1MC06-060-10 Reliability Report (February 2004)

1
Thermoelectric Cooler
Reliability Report
RMT Ltd
53 Leninskij prosp
Moscow 119991 Russia
Phone +7-095-132-6817
Fax +7-095-132-5870
e-mail [email protected]
http://www.rmtltd.ru
Moscow, February 5th, 2004
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru
2
Contents
1
Introduction ......................................................................................................................................3
1.1
Background.............................................................................................................................3
1.2
Contents of This Report ..........................................................................................................3
1.3
Notice of Confidentiality ..........................................................................................................3
2
Test Program ...................................................................................................................................4
2.1
Test Program Content.............................................................................................................4
2.2
Sampling Plan.........................................................................................................................5
2.3
Test Plan.................................................................................................................................5
3
Methods ...........................................................................................................................................6
3.1
General ...................................................................................................................................6
3.2
Military Standards ...................................................................................................................6
3.3
Telcordia Requirements..........................................................................................................6
4
Thermoelectric Coolers ...................................................................................................................7
5
Variable Frequency Vibration Testing .............................................................................................8
5.1
Purpose of Test.......................................................................................................................8
5.2
Test Method Used...................................................................................................................8
5.3
Test Equipment Details...........................................................................................................8
5.4
Test Parameters .....................................................................................................................8
5.5
Test Data ................................................................................................................................8
5.6
Test Results ..........................................................................................................................10
6
Mechanical Shock Testing.............................................................................................................11
6.1
Purpose of Test.....................................................................................................................11
6.2
Test Method Used.................................................................................................................11
6.3
Test Equipment Details.........................................................................................................11
6.4
Test Parameters ...................................................................................................................11
6.5
Test Data ..............................................................................................................................11
6.6
Test Results ..........................................................................................................................13
7
Temperature Cycling .....................................................................................................................14
7.1
Purpose of Test.....................................................................................................................14
7.2
Test Method Used.................................................................................................................14
7.3
Test Equipment Details.........................................................................................................14
7.4
Test Parameters ...................................................................................................................14
7.5
Test Data ..............................................................................................................................14
7.6
Test Results ..........................................................................................................................17
8
Power Cycle Testing......................................................................................................................18
8.1
Purpose of Test.....................................................................................................................18
8.2
Test Method Used.................................................................................................................18
8.3
Test Equipment Details.........................................................................................................18
8.4
Test Parameters ...................................................................................................................18
8.5
Test Data ..............................................................................................................................18
8.6
Test Results ..........................................................................................................................21
9
Thermoelectric Cooler Qualification Summary Sheet ...................................................................22
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3
1 Introduction
This Section contains a description of the background of the testing, a brief overview of the contents of
this Report, and a Notice of Confidentiality.
1.1
Background
RMT Ltd has performed complex qualification testing of TE modules for application is Space program.
Thermoelectric cooler type– 1MC06-060-10.
1.2
Contents of This Report
Section 2 contains brief description of Qualification Test Program. Section 3 – brief description of
produced batch of TE modules. Sections 4 through 9 contain detailed information regarding the
multiple types of testing conducted on the selected modules. For each test, the purpose of the test,
test methods, test equipment used, test data, test results, and conclusions are described.
1.3
Notice of Confidentiality
This Report and all of its contents are to be treated as confidential information. The Report may not be
reproduced, or may the information contained within be divulged to third parties, without the prior
written consent of RMT Ltd.
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4
2 Test Program
2.1
Test Program Content
Content of the Test Program is the following:
Table 2.1-1 Qualification Inspection Sequence
No
Test
1 Electrical Measurements
Test Conditions
Per Table 2.1.2
2
Mounting of units to test base
With InSb solder (117 °C)
3
4
Performance Test in Nitrogen
Vibration
5
6
7
Mechanical Shock
Electrical Measurements
Life Test
8
9
Performance Test in Vacuum
Final electrical Measurement
Note 1
MIL-STD-883E, Method 2007.2, Vibration, Variable
Frequency
MIL-STD-883E, Method 2002.3, Mechanical Shock
Per Table 2.1.2
MIL-STD-883E, Method 1006, Intermittent Life
Tamb= 85°C
Current: Imax=1.65 A
Cycle Time: 5 minutes on and 5 minutes off.
Number of cycles: 6000 cycles (1000 hrs)
Note 1
Per Table 2.1.2, AC Resistance change: < 5% of
initial value
Note 2
10 External Visual Inspection
Notes:
1) Verify that the performance meets the following specification:
a. Thot = 30 °C
b. Tcold = -42 ±2°C
c.
Current = Imax=1.65 A ±5%
d. Voltage = Umax=7.5 V ±5%
2) The TEC shall be examined to verify that the materials, design and construction, physical
dimensions, marking and workmanship are in accordance with the requirements specified
herein. They shall be free from cracks, voids, sharp edges and other defects that would be
adversely affect life or serviceability.
Table 2.1-2 Electrical Measurements at Room Temperature
No
Characteristics
Symbol
1
AC Resistance
R
2
Insulation Resistance
Ri
Test Conditions
VDC= 500 ± 50V
Limits
Min
Max
Unit
3.40
3.75
Ω
10
-
MΩ
Note
Testing includes the following methods:
1) Vibration
2) Mechanical Shock
3) Life Test (High temperature Burn-In)
4) To this report additional method is included – Temperature Cycling
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2.2
Sampling Plan
Sampling Plan for the program is the following:
Table 2.2-1 Sampling Plan
No
1
2
3
4
2.3
Test
Vibration
Mechanical Shock
Life Test (Power Cycle Test)
Temperature Cycling
LTPD, %
Acceptance
Number
0
0
0
0
10
10
2
7
Sample Size,
pcs
22
22
116
32
Test Plan
Total batch of produced TE modules was divided into lots according to Test Plan:
Table 2.3.1 Test Plan
No
1
2
3
4
5
6
7
8
9
Test
Electrical Measurements
Performance Test in Vacuum
Vibration
Mechanical Shock
Life Test (Power Cycle Test)
Temperature Cycling
External Visual Inspection
Performance Test in Vacuum
Final Electrical Measurement
Lot 22 pcs
100%
2 pcs
100%
100%
2 pcs
100%
Lot 22 pcs
100%
2 pcs
100%
100%
2 pcs
100%
Lot 116 pcs
100%
6 pcs
100%
100%
6 pcs
100%
Lot 32 pcs
100%
2 pcs
100%
100%
2 pcs
100%
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3 Methods
3.1
General
Methods used for testing reported herein are based on military standards and Telcordia requirements.
3.2
Military Standards
Military standards (abbreviated in the singular as “MIL-STD”) were originally developed for defense
and aerospace related organizations, but lately these standards have been adopted by many
commercial and industrial companies ranging from those using thermoelectric for telecommunications
to those using them for medical applications. Thermoelectric modules, being typically comprised of a
small circuit of Peltier elements, are tested using MIL-STD 883 for microcircuits.
3.3
Telcordia Requirements
Telcordia, whose requirements are referenced in this report, is a company that provides technical
analysis, testing, and consulting services to product suppliers and service providers in the
communications market. Telcordia’s GR-468 CORE is their generic reliability assurance requirement.
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7
4 Thermoelectric Coolers
Total batch of 250 TE modules was produced for purposes of current Qualification Test Program.
Production Specification # 1157 dated 15.12.2003. The Specification is attached.
All TE modules were hot side metallized and pre-tinned by InSn solder (117 deg. C melting point)
Hot side – nicked (clear) ceramics, except 12 samples prepared for performance testing in vacuum.
Cold side of these 12 TE modules was metallized for thermocouples mounting.
The first 192 samples were divided into four lots according to Sampling Plan (Item 2.2).
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5 Variable Frequency Vibration Testing
5.1
Purpose of Test
The variable frequency vibration test was performed for the purpose of determining the effect of
vibration frequency in the specified frequency range on component parts.
5.2
Test Method Used
The basic test method employed was MIL-SDT-883E. Method 2007.2. Vibration. Variable Frequency.
All 22 samples have been taken from produced batch # 1157 (Appendix 1).
Every TE module has been soldered (solder InSn, 117 deg. C melting point) onto individual flat copper
sub-holder.
The 22 parts were bolted to the vibration table on three different faces. These parts were then
subjected to vibration at a 20 G level from 20 to 2.000 Hz. The frequency sweep up and down was
performed in four minutes and repeated four more times. The axis was then changed and the sweep
was repeated another four times. The same process was repeated for three axis as well.
A measurement of the AC Resistance and Figure-of-Merit of each part was taken before and after
each test. Performance pre-test and post-test are compared of selected samples from the lot.
Performance pre-test and post-test are compared of selected samples from the lot.
5.3
Test Equipment Details
The following test equipment was used to conduct this test.
Vibration Machine ВЭДС-200А (Russia), S/N 44-24675.
TEC Vacuum Performance Tester DX3085.
DX4065 Z-Meter (ACR, Z, Time Constant), S/N 10-0012.
Insulation Tester MEG, P/N 690326.
Microscope LOMO Stereo-MX-3, S/N TT0009.
5.4
Test Parameters
The test was conducted at room temperature with the parts in a non-operational mode. A four-minute
sweep up and down was conducted at 20 G’s over a frequency range of 20 to 2.000 Hz in four
minutes. Four such sweeps were done on each of three axes.
Ambient conditions: temperature 22 oC, humidity 57%, pressure 742 mmHg
5.5
Test Data
After testing visual inspection shows no any damaged sample.
Insulation resistance measurement before and after testing shows Ri>300 MOhm, close to the upper
level of Tester scale. Table with detailed listing of each tested samples did not included into the
document.
Table 5.1-1 shows the data from the test of the TEC 1MC06-060-10 part. The before and after test
Resistances in Ohms and Figure-of-Merit (Z) in 1000/K are shown, as well as the calculated change
value.
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3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.20
2.80
2.75
2.70
Z
R, Ohm
Table 5.5-1. Resistance and Figure-of-Merit Data for TEC 1MC06-060-10 Vibration Test (dated
20/01/04)
Before
After
Before
After
ΔR
ΔZ
Sample #
Sample #
Ohm
Ohm
1000/K 1000/K
%
%
A1
3.41
3.47
1.76%
A1
1.11%
2.70
2.73
A2
3.43
3.45
0.58%
A2
0.00%
2.72
2.72
A3
3.43
3.47
1.17%
A3
0.37%
2.73
2.74
A4
3.43
3.50
2.04%
A4
-1.82%
2.74
2.69
A5
3.42
3.44
0.58%
A5
-0.37%
2.72
2.71
A6
3.36
3.38
0.60%
A6
-0.73%
2.75
2.73
A7
3.37
3.40
0.89%
A7
0.00%
2.72
2.72
A8
3.40
3.40
0.00%
A8
-1.09%
2.75
2.72
A9
3.39
3.38
-0.29%
A9
0.00%
2.74
2.74
A10
3.38
3.37
-0.30%
A10
-1.86%
2.69
2.64
A11
3.42
3.49
1.95%
A11
-0.77%
2.71
2.69
A12
3.37
3.42
1.55%
A12
0.40%
2.72
2.73
A13
3.40
3.46
1.67%
A13
-0.37%
2.73
2.72
A14
3.29
3.29
0.01%
A14
-2.17%
2.72
2.66
A15
3.41
3.41
0.12%
A15
-1.75%
2.72
2.67
A16
3.42
3.47
1.60%
A16
0.64%
2.72
2.74
A17
3.38
3.39
0.42%
A17
-1.11%
2.73
2.70
A18
3.33
3.37
1.13%
A18
0.04%
2.71
2.71
A19
3.38
3.38
0.06%
A19
0.69%
2.70
2.72
A20
3.26
3.25
-0.22%
A20
-1.06%
2.74
2.71
A21
3.36
3.39
0.92%
A21
-0.86%
2.71
2.68
A22
3.37
3.42
1.44%
A22
-1.28%
2.70
2.67
Average
3.38
3.41
0.80%
Average
2.72
2.71
-0.54%
Min
3.26
3.25
-0.30%
Min
2.69
2.64
1.11%
Max
3.43
3.50
2.04%
Max
2.75
2.74
-2.17%
2.65
2.60
2.55
2.50
2
3
2
3
Table 5.5-2 Performance of TECs 1MC06-060-10 before and after Vibration Test
Sample #
A11
A22
ΔTmax
K
70.5
70.0
Before test
Imax
Umax
V
A
7.3
1820
7.2
1800
ΔTmax
K
69.8
69.5
After test
Umax
V
7.4
7.3
Imax
A
1820
1800
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5.6
Test Results
5.6.1 A total of 22 parts were selected for the purpose of this report. Telcordia provides a suggested
passing criterion for such a test in GR-468 CORE of less than 5% change in resistance. All parts
tested met the suggested criterion, with maximal change in resistance 2.04%, minimal change -0.37
%. The average change value is of 0.80%.
5.6.2 Figure–of-Merit (Z) was controlled too. All parts showed slight change of TEC performance with
maximal change in Z is -2.17%, minimal change 1.11%. The average change value is of -0.54%.
Performance testing in vacuum also before and after test of selected samples showed good
correlation with Z measurements of all samples of the lot – correspondent only slight reduction of
ΔTmax
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6 Mechanical Shock Testing
6.1
Purpose of Test
The purpose of this test was to determine the suitability of the thermoelectric modules for use in
equipment which may be subject to moderately severe shocks as a result of suddenly applied forces
or abrupt changes in motion.
6.2
Test Method Used
The basic test method employed was MIL-SDT-883E. Method 2002.3. Mechanical Shock.
All 22 samples have been taken from produced batch # 1157 (Appendix 1).
Every TE module has been soldered (solder InSn, 117 deg. C melting point) onto individual flat copper
sub-holder.
The 22 parts were initially prepared by mounting them successively on the test platform. The test
platform was impacted by a swing arm to apply the mechanical shock. These parts were then
subjected to shock at 1500 G level using a 0.5 msec duration half-sine wave pulse. Each device was
shocked a total of 5 times in the first axis. The axis was then changed and the shock was repeated
another 5 times. The same process was repeated for each of the remaining four axes as well.
A measurement of the AC Resistance and Figure-of-Merit of each part was taken before and after
each test. Performance pre-test and post-test are compared of selected samples from the lot.
Performance pre-test and post-test are compared of selected samples from the lot.
6.3
Test Equipment Details
The following test equipment was used to conduct this test.
Single Impact Machine STT, S/N P24/78-13617.
TEC Vacuum Performance Tester DX3085.
DX4065 Z-Meter (ACR, Z, Time Constant), S/N 10-0012.
Insulation Tester MEG, P/N 690326.
Microscope LOMO Stereo-MX-3, S/N TT0009.
6.4
Test Parameters
The test was conducted at room temperature with the parts in a non-operational mode. A total of five
shocks were conducted in each of six axes.
Ambient conditions: temperature 22 oC, humidity 56%, pressure 740 mmHg
6.5
Test Data
After testing visual inspection shows no any damaged sample.
Insulation resistance measurement before and after testing shows Ri>300 MOhm, close to the upper
level of Tester scale. Table with detailed listing of each tested samples did not included into the
document.
Table 6.5-1 shows the data from the test of the TEC 1MC06-060-10 part. The before and after test AC
Resistances in Ohms and Figure-of-Merit (Z) in 1000/K are shown, as well as the calculated change
value.
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Table 6.5-1. Resistance and Figure-of-Merit Data for TEC 1MC06-060-10 Mechanical Shock Test
(dated 27/01/04)
Sample #
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Average
Min
Max
R
Before
3.45
3.47
3.47
3.45
3.47
3.44
3.43
3.44
3.47
3.45
3.40
3.44
3.38
3.41
3.42
3.37
3.47
3.40
3.43
3.41
3.39
3.43
3.43
3.37
3.47
R
After
3.44
3.44
3.46
3.44
3.59
3.51
3.43
3.49
3.52
3.48
3.43
3.43
3.49
3.47
3.42
3.49
3.52
3.42
3.48
3.48
3.47
3.50
3.47
3.42
3.59
ΔR
Sample #
-0.29%
-0.86%
-0.29%
-0.29%
3.46%
2.03%
0.00%
1.45%
1.44%
0.87%
0.88%
-0.29%
3.23%
1.64%
-0.10%
3.33%
1.33%
0.42%
1.38%
2.11%
2.42%
1.90%
1.17%
-0.86%
3.46%
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Average
Min
Max
3.65
2.80
3.60
2.75
Z
After
2.73
2.74
2.74
2.75
2.66
2.68
2.73
2.73
2.74
2.76
2.74
2.63
2.64
2.69
2.69
2.74
2.63
2.61
2.67
2.61
2.65
2.75
2.70
2.61
2.76
ΔZ
-0.36%
-0.36%
0.00%
0.00%
-2.92%
-2.55%
-0.36%
-0.73%
0.00%
0.36%
0.00%
-2.78%
-1.72%
-0.54%
-1.82%
-0.45%
-2.05%
-3.17%
-0.88%
-1.98%
-1.52%
0.30%
-1.07%
0.36%
-3.17%
2.70
3.50
Z
R, Ohm
3.55
Z
Before
2.74
2.75
2.74
2.75
2.74
2.75
2.74
2.75
2.74
2.75
2.74
2.70
2.69
2.70
2.74
2.75
2.69
2.69
2.69
2.67
2.69
2.74
2.72
2.67
2.75
3.45
2.65
3.40
2.60
3.35
2.55
3.30
2.50
2
3
2
3
Table 6.5-1. Performance of TECs 1MC06-060-10 before and after Mechanical Shock Test
Sample #
B11
B22
ΔTmax
K
71.0
70.5
Before test
Imax
Umax
V
A
7.5
1850
7.3
1800
ΔTmax
K
70.0
70.5
After test
Umax
V
7.6
7.4
Imax
A
1850
1800
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6.6
Test Results
6.6.1 A total of 22 parts were selected for the purpose of this report. Telcordia provides a suggested
passing criterion for such a test in GR-468 CORE of less than 5% change in resistance. All parts
tested met the suggested criterion, with maximal change in resistance 3.46%, minimal change -0.86
%. The average change value is of 1.17%.
6.6.2 Figure–of-Merit (Z) was controlled too. All parts showed slight change of TEC performance with
maximal change in Z is -3.17%, minimal change 0.36%. The average change value is of -1.07%.
6.6.3 Performance testing in vacuum also before and after test of selected samples showed good
correlation with Z measurements of all samples of the lot – correspondent only slight reduction of
ΔTmax
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7 Temperature Cycling
7.1
Purpose of Test
The purpose of this test was to determine the resistance of the parts to alternate exposure to extremes
of high and low temperatures.
7.2
Test Method Used
The basic test method employed was MIL-SDT-883E. Method 1010.7. Condition B.
All 32 samples have been taken from produced batch # 1157 (Appendix 1).
The ovens were then heated to 125oC and the cold chamber was brought down to -55oC. The TE
modules were then placed in the oven for a period of 10 minutes, and then place in the cold chamber.
also for a period of 10 minutes. Fast transfer between cold and hot chambers (less then 5 sec) was
provided.
This cycling was repeated until any sample of the tested lot reaches 5% change in AC Resistance.
A measurement of the AC Resistance and Figure-of-Merit of each part was taken before and after
each test. Performance pre-test and post-test are compared of selected samples from the lot.
Performance pre-test and post-test are compared of selected samples from the lot..
7.3
Test Equipment Details
The following test equipment was used to conduct this test.
TABAI Thermal Shock Chamber TSE-10, S/N450118
TEC Vacuum Performance Tester DX3085.
DX4065 Z-Meter (ACR, Z, Time Constant), S/N 10-0012.
Insulation Tester MEG, P/N 690326.
Microscope LOMO Stereo-MX-3, S/N TT0009.
7.4
Test Parameters
The hot chamber temperature was set to 125oC. while the cold chamber was set to -55oC. The parts
were held at each temperature for a minimum of 10 minutes for each exposure.
This cycling was repeated until any sample of the tested lot reaches 5% change in AC Resistance.
7.5
Test Data
After testing visual inspection shows no any damaged sample.
Insulation resistance measurement before and after testing shows Ri>300 MOhm, close to the upper
level of Tester scale. Table with detailed listing of each tested samples did not included into the
document.
Tables 7.5-1 and 7.5-2 shows the data from the test of the TEC 1MC06-060-10 part. The before and
after test AC Resistances in Ohms and Figure-of-Merit (Z) in 1000/K are shown, as well as the
calculated change value.
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Table 7.5-1. Resistance Data for TEC 1MC06-060-10 Temperature Cycling Test (finished 25.01.04)
Sample #
0
130
270
410
500
630
760
900
3.45
3.48
3.50
3.50
3.49
3.44
3.35
3.36
3.47
3.49
3.43
3.52
3.44
3.44
3.41
3.45
3.47
3.45
3.47
3.41
3.38
3.36
3.36
3.36
3.37
3.36
3.45
3.44
3.43
3.35
3.43
3.39
3.43
3.35
3.47
3.45
3.46
3.49
3.47
3.47
3.41
3.36
3.37
3.45
3.47
3.41
3.48
3.45
3.44
3.41
3.45
3.44
3.43
3.44
3.42
3.39
3.35
3.40
3.37
3.37
3.35
3.45
3.43
3.43
3.37
3.42
3.41
3.42
3.35
3.45
3.54
3.46
3.56
3.49
3.54
3.48
3.42
3.43
3.51
3.47
3.44
3.51
3.51
3.46
3.43
3.48
3.45
3.43
3.46
3.41
3.47
3.38
3.44
3.39
3.37
3.37
3.44
3.43
3.43
3.39
3.45
3.39
3.45
3.37
3.51
3.54
3.48
3.52
3.49
3.56
3.48
3.40
3.44
3.50
3.49
3.42
3.49
3.47
3.45
3.46
3.47
3.47
3.42
3.45
3.41
3.39
3.37
3.45
3.38
3.38
3.38
3.46
3.44
3.47
3.39
3.46
3.42
3.45
3.37
3.47
3.48
3.45
3.49
3.46
3.51
3.42
3.39
3.42
3.55
3.51
3.45
3.52
3.49
3.48
3.51
3.48
3.48
3.42
3.44
3.41
3.40
3.36
3.46
3.39
3.39
3.40
3.48
3.45
3.44
3.44
3.49
3.45
3.45
3.36
3.51
3.53
3.54
3.51
3.52
3.56
3.50
3.43
3.45
3.54
3.54
3.45
3.49
3.46
3.52
3.51
3.47
3.51
3.45
3.44
3.46
3.42
3.38
3.49
3.40
3.39
3.38
3.51
3.48
3.48
3.41
3.51
3.47
3.48
3.38
3.52
3.59
3.51
3.55
3.48
3.55
3.43
3.42
3.44
3.57
3.48
3.44
3.51
3.50
3.46
3.46
3.45
3.46
3.43
3.45
3.50
3.43
3.40
3.38
3.40
3.39
3.39
3.48
3.46
3.46
3.46
3.47
3.42
3.46
3.38
3.50
3.57
3.52
3.55
3.51
3.57
3.47
3.45
3.51
3.53
3.53
3.45
3.51
3.51
3.47
3.46
3.51
3.48
3.46
3.46
3.44
3.43
3.38
3.52
3.41
3.40
3.41
3.48
3.46
3.47
3.41
3.50
3.43
3.48
3.38
3.52
R, Ohm
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
Average
Min
Max
Cycles/R, Ohm
ΔR
3.48%
1.15%
1.43%
0.29%
2.29%
0.87%
2.99%
4.46%
1.73%
1.15%
0.58%
-0.28%
2.03%
0.87%
1.47%
1.74%
0.29%
0.29%
-0.29%
0.88%
1.48%
0.60%
4.76%
1.49%
0.89%
1.49%
0.87%
0.58%
1.17%
1.79%
2.04%
1.18%
1.43%
-0.29%
4.76%
3.65
3.60
3.55
3.50
3.45
3.40
3.35
3.30
0
100 200 300 400 500 600 700 800 900
Cycles
RMT Ltd
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16
Table 7.5-2. Figure-of-Merit TEC 1MC06-060-10 Temperature Cycling Test (finished 25.01.04)
Sample #
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
Average
Min
Max
0
2.76
2.79
2.73
2.72
2.73
2.70
2.71
2.74
2.75
2.74
2.72
2.77
2.73
2.76
2.71
2.75
2.74
2.66
2.75
2.73
2.70
2.74
2.73
2.74
2.77
2.74
2.74
2.71
2.76
2.77
2.68
2.77
2.74
2.66
2.77
130
2.74
2.79
2.73
2.71
2.72
2.70
2.69
2.72
2.74
2.74
2.72
2.76
2.72
2.75
2.70
2.74
2.74
2.66
2.75
2.73
2.69
2.74
2.71
2.74
2.76
2.73
2.74
2.70
2.75
2.76
2.67
2.77
2.73
2.66
2.77
270
2.75
2.78
2.73
2.71
2.71
2.71
2.70
2.72
2.71
2.74
2.72
2.76
2.76
2.78
2.73
2.78
2.77
2.64
2.73
2.72
2.69
2.74
2.69
2.73
2.75
2.73
2.73
2.70
2.75
2.75
2.66
2.70
2.73
2.64
2.78
Cycles/Z, 1000/K
410
500
2.73
2.73
2.79
2.77
2.73
2.68
2.71
2.69
2.71
2.68
2.70
2.69
2.69
2.64
2.71
2.71
2.73
2.74
2.73
2.73
2.71
2.72
2.75
2.76
2.72
2.72
2.74
2.74
2.70
2.71
2.74
2.73
2.74
2.73
2.65
2.64
2.73
2.72
2.72
2.71
2.68
2.68
2.73
2.73
2.69
2.68
2.72
2.72
2.75
2.75
2.72
2.72
2.73
2.73
2.69
2.70
2.74
2.75
2.75
2.75
2.65
2.66
2.75
2.76
2.72
2.71
2.65
2.64
2.75
2.76
630
2.73
2.80
2.72
2.71
2.70
2.70
2.69
2.70
2.73
2.73
2.71
2.75
2.72
2.73
2.71
2.73
2.74
2.65
2.73
2.72
2.68
2.73
2.68
2.71
2.75
2.71
2.73
2.70
2.75
2.74
2.65
2.76
2.72
2.65
2.76
760
2.73
2.77
2.72
2.70
2.70
2.69
2.68
2.70
2.72
2.72
2.70
2.75
2.72
2.73
2.71
2.73
2.73
2.64
2.72
2.67
2.71
2.68
2.73
2.72
2.74
2.71
2.72
2.69
2.74
2.75
2.64
2.69
2.71
2.64
2.75
900
2.73
2.78
2.73
2.70
2.70
2.69
2.68
2.71
2.72
2.71
2.71
2.75
2.71
2.71
2.72
2.73
2.73
2.64
2.72
2.71
2.67
2.72
2.67
2.71
2.74
2.70
2.72
2.69
2.74
2.74
2.65
2.69
2.71
2.64
2.74
ΔZ
-1.09%
-0.36%
0.00%
-0.74%
-1.10%
-0.37%
-1.11%
-1.09%
-1.09%
-1.09%
-0.37%
-0.72%
-0.73%
-1.81%
0.37%
-0.73%
-0.36%
-0.75%
-1.09%
-0.73%
-1.11%
-0.73%
-2.20%
-1.09%
-1.08%
-1.46%
-0.73%
-0.74%
-0.72%
-1.08%
-1.12%
-2.89%
-0.94%
-2.89%
0.37%
2.85
2.80
Z
2.75
2.70
2.65
2.60
0
100
200
300
400
500
600
700
800
900
Cycles
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru
17
Table 7.5-3. Performance of TECs 1MC06-060-10 before and after Temperature Cycling Test
Sample #
C11
C22
7.6
ΔTmax
K
70.2
70.5
Before test
Imax
Umax
V
mA
7.3
1800
7.3
1850
ΔTmax
K
70.0
70.3
After test
Umax
V
7.4
7.4
Imax
mA
1800
1850
Test Results
7.6.1 A total of 32 parts were selected for the purpose of this report. Telcordia provides a suggested
passing criterion for such a test in GR-468 CORE of less than 5% change in resistance. All parts
tested met the suggested criterion, with maximal change in resistance 4.76%, minimal change -0.29
%. The average change value is of 1.43%.
7.6.2 Figure –of-Merit (Z) was controlled too. All parts showed slight change of TEC performance with
maximal change in Z is -2.89%, minimal change 0.37%. The average change value is of -0.94%.
7.6.3 Performance testing in vacuum also before and after test of selected samples showed good
correlation with Z measurements of all samples of the lot – correspondent only slight reduction of
ΔTmax
7.6.4 The tested samples withstood 9 times longer testing than required by Telcordia GR-468 CORE.
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru
18
8 Power Cycle Testing
8.1
Purpose of Test
The purpose of this test was to determine the resistance of the parts to thermal/electrical stresses
generated by sudden cycling between “on” and “off” conditions.
8.2
Test Method Used
The basic test method employed was MIL-SDT-883E, Method 1006, Intermittent Life, Condition B.
It is required to confirm reliability of selected TE modules of 50 FIT. That is why sample size increased
to 116 samples (LTPD 2%) is applied.
All 116 samples have been taken from produced batch # 1157 (Appendix 1).
Every TE module has been soldered (solder InSn, 117 deg. C melting point) onto individual flat copper
sub-holder.
Prior to the test, the AC Resistance and Insulation Resistance of each TE module were recorded.
Measurement of Performance in vacuum of 6 selected samples has been made prior the test.
Every TE module mounted onto sub-holder has been mounted onto common heat sink using thermally
conductive grease as an interface material. The wires from the test TE modules were run to a power
supply controlled by a programmable controller. The heat sink with mounted TE modules was placed
into oven.
The oven temperature was then set to keep the parts at 85oC. The programmable controller cycled the
thermoelectric modules between the “on” and “off” conditions for 1000 hours.
8.3
Test Equipment Details
The following test equipment was used to conduct this test.
HERAEUS Power Controller КRGU.UI-45-7785
HERAEUS Oven HEP 2, S/N 8903510
DX2050 Programmable Time Controller
TEC Vacuum Performance Tester DX3085.
DX4065 Z-Meter (ACR, Z, Time Constant), S/N 10-0012.
Insulation Tester MEG, P/N 690326.
Microscope LOMO Stereo-MX-3, S/N TT0009.
8.4
Test Parameters
The TE modules were run at maximum current (Imax) according to specification on the TE modules,
which was specified as 1.65 Amps at a duty cycle of 5 min on and 5 min off.
The ambient temperature was set at 85oC, and the parts were tested for 1000 hrs (6000 cycles) to
meet the requirements of the intermittent life test.
8.5
Test Data
After testing visual inspection shows no any damaged sample.
Insulation resistance measurement before and after testing shows Ri>300 MOhm, close to the upper
level of Tester scale. Table with detailed listing of each tested samples did not included into the
document.
RMT Ltd
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19
Tables 8.5-1 and 8.5-2 shows the data from the test of the TEC 1MC06-060-10 part. The before and
after test AC Resistances in Ohms and Figure-of-Merit (Z) in 1000/K are shown, as well as the
calculated change value.
Table 8.5-1. Resistance (Ohm) Data for TEC 1MC06-060-10 Power Cycling (finished 24.01.04)
Before After
3.43
3.37
3.42
3.39
3.38
3.39
3.38
3.38
3.38
3.42
3.40
3.42
3.40
3.40
3.39
3.38
3.42
3.40
3.42
3.42
3.40
3.41
3.40
3.42
3.41
3.42
3.40
3.40
3.37
3.42
3.44
3.42
3.38
3.43
3.40
3.42
3.39
3.41
3.42
3.41
3.37
3.40
3.40
3.44
3.49
3.47
3.46
3.44
3.42
3.51
3.51
3.45
3.43
3.48
3.43
3.48
3.50
3.52
3.44
3.45
3.49
3.46
3.50
3.50
3.49
3.45
3.49
3.52
3.54
3.52
3.46
3.47
3.47
3.46
3.50
3.53
3.45
3.54
3.46
3.51
3.50
3.51
3.51
3.54
3.44
3.46
3.52
3.53
ΔR
1.54%
2.88%
1.17%
1.47%
1.15%
3.57%
3.76%
2.10%
1.48%
1.75%
0.76%
1.77%
2.98%
3.50%
1.49%
1.93%
2.07%
1.81%
2.33%
2.30%
2.73%
1.23%
2.87%
3.01%
3.95%
2.91%
1.60%
2.19%
2.87%
1.31%
1.94%
3.28%
1.89%
3.32%
1.60%
2.70%
3.14%
2.71%
2.63%
3.53%
2.05%
1.81%
3.50%
2.66%
Samples
#
D45
D46
D47
D48
D49
D50
D51
D52
D53
D54
D55
D56
D57
D58
D59
D60
D61
D62
D63
D64
D65
D66
D67
D68
D69
D70
D71
D72
D73
D74
D75
D76
D77
D78
D79
D80
D81
D82
D83
D84
D85
D86
D87
D88
Before After
3.40
3.42
3.42
3.38
3.42
3.37
3.44
3.40
3.40
3.38
3.44
3.40
3.39
3.39
3.38
3.40
3.42
3.43
3.40
3.37
3.39
3.39
3.44
3.40
3.42
3.38
3.41
3.40
3.43
3.38
3.39
3.37
3.41
3.43
3.39
3.40
3.41
3.39
3.39
3.42
3.40
3.39
3.43
3.42
3.50
3.49
3.52
3.47
3.52
3.41
3.52
3.49
3.50
3.51
3.50
3.45
3.48
3.44
3.45
3.53
3.47
3.49
3.48
3.48
3.51
3.43
3.57
3.46
3.48
3.44
3.51
3.49
3.54
3.46
3.44
3.49
3.46
3.50
3.47
3.46
3.52
3.44
3.49
3.51
3.45
3.44
3.52
3.54
ΔR
2.83%
1.93%
2.90%
2.61%
2.78%
1.20%
2.47%
2.75%
2.85%
3.70%
1.65%
1.60%
2.72%
1.57%
2.11%
3.66%
1.56%
1.69%
2.10%
3.24%
3.40%
1.41%
3.65%
1.95%
2.04%
1.71%
2.98%
2.63%
3.38%
2.42%
1.41%
3.57%
1.69%
2.17%
2.31%
1.70%
3.43%
1.73%
3.16%
2.65%
1.58%
1.59%
2.75%
3.42%
Samples
#
D89
D90
D91
D92
D93
D94
D95
D96
D97
D98
D99
D100
D101
D102
D103
D104
D105
D106
D107
D108
D109
D110
D111
D112
D113
D114
D115
D116
Average
Min
Max
Before After
3.40
3.37
3.38
3.38
3.41
3.43
3.39
3.40
3.40
3.45
3.40
3.42
3.41
3.42
3.38
3.39
3.41
3.44
3.42
3.39
3.36
3.42
3.40
3.43
3.42
3.40
3.41
3.39
3.40
3.37
3.44
3.48
3.50
3.49
3.45
3.48
3.48
3.51
3.50
3.47
3.56
3.51
3.48
3.47
3.54
3.48
3.49
3.52
3.56
3.48
3.47
3.47
3.47
3.48
3.49
3.47
3.51
3.50
3.50
3.48
3.42
3.54
ΔR
2.46%
3.75%
3.38%
2.12%
2.08%
1.46%
3.53%
3.02%
2.20%
3.22%
3.03%
1.63%
1.65%
3.61%
2.97%
2.84%
3.13%
3.41%
1.68%
2.15%
3.05%
1.54%
2.24%
1.54%
1.58%
3.29%
2.61%
3.37%
2.35%
0.76%
3.95%
3.60
3.55
R, Ohm
Samples
#
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
D32
D33
D34
D35
D36
D37
D38
D39
D40
D41
D42
D43
D44
3.50
3.45
3.40
3.35
2
3
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected]ol.ru http://www.rmtltd.ru
20
Table 8.5-2. Figure-of-Merit (1000/K) for TEC 1MC06-060-10 Power Cycling (finished 24.01.04)
After
2.64
2.66
2.72
2.66
2.69
2.62
2.70
2.60
2.72
2.72
2.68
2.66
2.71
2.61
2.66
2.65
2.67
2.71
2.68
2.68
2.71
2.58
2.69
2.68
2.65
2.67
2.66
2.69
2.64
2.65
2.59
2.70
2.61
2.71
2.62
2.66
2.64
2.68
2.66
2.64
2.65
2.69
2.68
2.69
ΔR
Samples Before
#
2.73
-4.00% D45
-1.48% D46
2.75
-0.37% D47
2.73
-1.12% D48
2.73
-1.47% D49
2.72
-2.53% D50
2.72
-0.48% D51
2.69
-3.70% D52
2.71
-0.44% D53
2.73
-0.37% D54
2.72
-1.47% D55
2.68
-2.13% D56
2.72
-1.63% D57
2.74
-4.40% D58
2.70
-1.65% D59
2.71
-1.85% D60
2.73
-2.34% D61
2.73
-0.95% D62
2.69
-0.78% D63
2.71
-1.18% D64
2.68
-0.81% D65
2.71
-3.87% D66
2.73
-0.41% D67
2.73
-1.87% D68
2.73
-2.79% D69
2.71
-1.22% D70
2.69
-1.19% D71
2.69
-1.18% D72
2.73
-3.83% D73
2.69
-3.07% D74
2.67
-3.68% D75
2.72
-0.74% D76
2.68
-2.94% D77
2.73
-0.73% D78
2.70
-3.53% D79
2.74
-1.44% D80
2.74
-3.40% D81
2.69
-0.85% D82
2.73
-1.37% D83
2.76
-2.62% D84
2.70
-2.50% D85
2.68
-0.66% D86
2.74
-1.69% D87
2.69
-0.88% D88
2.72
After
2.67
2.66
2.70
2.64
2.67
2.66
2.60
2.69
2.65
2.63
2.58
2.64
2.70
2.60
2.61
2.63
2.63
2.66
2.68
2.64
2.61
2.63
2.68
2.63
2.61
2.64
2.64
2.68
2.66
2.60
2.66
2.67
2.69
2.66
2.71
2.71
2.66
2.67
2.65
2.68
2.59
2.72
2.60
2.70
ΔR
Samples Before
#
-2.09% D89
2.72
-3.20% D90
2.68
-1.10% D91
2.71
-3.26% D92
2.69
-1.77% D93
2.73
-2.13% D94
2.75
-3.27% D95
2.74
-0.81% D96
2.73
-3.00% D97
2.70
-3.38% D98
2.72
-3.70% D99
2.73
-2.76% D100
2.73
-1.35% D101
2.73
-3.74% D102
2.69
-3.55% D103
2.73
-3.56% D104
2.70
-3.70% D105
2.71
-0.93% D106
2.68
-1.18% D107
2.74
-1.46% D108
2.70
-3.55% D109
2.71
-3.66% D110
2.75
-1.83% D111
2.70
-3.66% D112
2.69
-3.73% D113
2.68
-1.79% D114
2.70
-1.68% D115
2.73
-1.90% D116
2.73
-1.23% Average 2.72
Min
2.68
-2.77%
2.76
-2.13% Max
-0.34%
-1.54%
2.80
-1.44%
2.75
-0.95%
2.70
-1.20%
2.65
-1.26%
-2.34%
2.60
-3.85%
2.55
-0.78%
2.50
-3.39%
2.45
-0.55%
2.40
-3.38%
2
-0.63%
After
ΔR
2.66
2.64
2.65
2.64
2.66
2.66
2.65
2.65
2.62
2.69
2.63
2.66
2.65
2.64
2.71
2.65
2.64
2.64
2.65
2.61
2.63
2.71
2.65
2.62
2.59
2.66
2.72
2.69
2.67
2.58
2.72
-2.28%
-1.35%
-2.21%
-1.79%
-2.60%
-3.10%
-3.14%
-2.79%
-2.82%
-1.03%
-3.66%
-2.42%
-2.89%
-1.93%
-0.84%
-1.96%
-2.73%
-1.42%
-3.28%
-3.44%
-2.95%
-1.38%
-1.74%
-2.71%
-3.43%
-1.37%
-0.33%
-1.47%
-1.85%
-0.37%
-4.40%
Z
Samples Before
#
D1
2.75
D2
2.70
D3
2.73
D4
2.69
D5
2.73
D6
2.69
D7
2.71
D8
2.70
D9
2.73
D10
2.73
D11
2.72
D12
2.72
D13
2.76
D14
2.73
D15
2.70
D16
2.70
D17
2.73
D18
2.74
D19
2.70
D20
2.71
D21
2.73
D22
2.68
D23
2.70
D24
2.73
D25
2.73
D26
2.70
D27
2.69
D28
2.72
D29
2.75
D30
2.73
D31
2.69
D32
2.72
D33
2.69
D34
2.73
D35
2.72
D36
2.70
D37
2.73
D38
2.70
D39
2.70
D40
2.71
D41
2.72
D42
2.71
D43
2.73
D44
2.71
3
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru
21
Table 8.5-3. Performance of TECs 1MC06-060-10 before and after Power Cycling
ΔTmax
K
71.0
70.5
71.0
71.0
71.0
71.5
Sample #
D1
D22
D44
D66
D88
D110
Before test
Umax
V
7.4
7.3
7.3
7.2
7.2
7.2
Imax
mA
1850
1850
1830
1800
1800
1820
ΔTmax
K
69.5
69.0
70.0
70.0
70.5
70.0
After test
Umax
V
7.4
7.4
7.5
7.3
7.5
7.3
Imax
mA
1850
1850
1830
1810
1830
1820
80
8
70
7
60
6
50
5
40
4
30
3
20
2
10
1
U, V
T, deg.C
Fig. 8.5-1. Example of Performance Test in vacuum (sample # D22, before)
0
0
8.6
500
1000
1500
Current, mA
2000
0
2500
Test Results
8.6.1 A total of 116 parts were selected for the purpose of this report. Telcordia provides a suggested
passing criterion for such a test in GR-468 CORE of less than 5% change in resistance. All parts
tested met the suggested criterion, with maximal change in resistance 3.95%, minimal change 0.76%. The average change value is of 2.35%.
8.6.2 Figure–of-Merit (Z) was controlled too. All parts showed slight change of TEC performance with
maximal change in Z is -4.40%, minimal change - 0.37%. The average change value is of -1.85%.
8.6.3 Performance testing in vacuum also before and after test of selected samples showed good
correlation with Z measurements of all samples of the lot – correspondent only slight reduction of
ΔTmax
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru
22
9 Thermoelectric Cooler Qualification Summary Sheet
TEC MODEL
Cold Side Dimensions
Hot Side Dimensions
Height
ΔTmax
Qmax
Imax
Umax
No of Couples
Element Cross-Section
Element Height
End Plates Ceramics
Assembly Solder
Barrier
Connection
1MC06-060-10
10 x 12 mm2
12 x 12 mm2
2,1 mm
72 deg.
6.6 W
1.65 A
7.5 V
60
0.6x 0.6 mm2
1.0 mm
Al2O3 (100%)
PbSn (187 deg. C)
Ni
Horizontal wires
QUALIFICATION TESTS
Power Cycling
Specification No A10-DJO-TS-0005, Table 8-1
MIL Sdt 883 Method 1006
Telcordia GR-468 CORE. R4-94
Complete
Temperature Cycling
MIL Std 883. method 1010 Condition B
Teclcordia GR-468 CORE. R-93
Complete
Mechanical Shock
Specification No A10-DJO-TS-0005, Table 8-1
MIL STD 883 Method 2002. Condition B
Telcordia GR-468 CORE R4-89
Complete
Vibration Test
Specification No A10-DJO-TS-0005, Table 8-1
MIL STD 883 Method 2007. Condition A 2
Telcordia GR-468 CORE. R4-90
Complete
Quality Manager
Date
Y.V. Zakhartsev
06.02.2004
RMT Ltd
53 Leninskij prosp Moscow 119991 Russia phone +7-095-132-6817 fax +7-095-132-5870 e-mail [email protected] http://www.rmtltd.ru