Reliability Report

AOS Semiconductor
Product Reliability Report
AOC2800,
rev A
Plastic Encapsulated Device
ALPHA & OMEGA Semiconductor, Inc
www.aosmd.com
This AOS product reliability report summarizes the qualification result for AOC2800.
Accelerated environmental tests are performed on a specific sample size, and then followed
by electrical test at end point. Review of final electrical test result confirms that AOC2800
passes AOS quality and reliability requirements. The released product will be categorized by
the process family and be monitored on a quarterly basis for continuously improving the
product quality.
Table of Contents:
I.
II.
III.
IV.
Product Description
Package and Die information
Environmental Stress Test Summary and Result
Reliability Evaluation
I. Product Description:
The AOC2800 uses advanced trench technology to provide excellent RSS(ON), low gate charge
and operation with gate voltages as low as 2.5V while retaining a 12V VGS(MAX) rating. It is
ESD protected. This device is suitable for use as a unidirectional or bi-directional load switch,
facilitated by its common-drain configuration.
-RoHS Compliant
-Halogen Free
Detailed information refers to datasheet.
II. Die / Package Information:
AOC2800
Standard sub-micron
Low voltage N channel
Package Type
WLCSP
Lead Frame
N.A
Die Attach
N.A
Bonding
0.35mm ball
Mold Material
N.A
MSL (moisture sensitive level) N.A
Process
Note * based on information provided by assembler and mold compound supplier
III. Result of Reliability Stress for AOC2800
Test Item
Test Condition
Time
Point
Lot
Attribution
Total
Sample
size
Number
of
Failures
Precondition
168hr 85°c
/85%RH +3 cycle
[email protected]°c
HTGB
-
6 lots
990pcs
0
JESD22A113
Temp = 150 °c,
Vgs=100% of
Vgsmax
168hrs
500 hrs
1000 hrs
308pcs
0
2 lots
2 lots
JESD22A108
Temp = 150 °c,
Vds=80% of
Vdsmax
168hrs
500 hrs
1000 hrs
77pcs / lot
308pcs
0
2 lots
2 lots
JESD22A108
130 +/- 2°°c,
85%RH, 33.3 psi,
Vgs = 80% of Vgs
max
121°°c, 29.7psi,
RH=100%
100 hrs
(Note A*)
6 lots
77pcs / lot
330pcs
0
JESD22A110
96 hrs
(Note A*)
6 lots
55pcs / lot
330pcs
0
JESD22A102
-65°°c to 150°°c,
air to air
250 / 500
cycles
(Note A*)
6 lots
55pcs / lot
330pcs
0
JESD22A104
(Note A*)
55pcs / lot
(Note A*)
HTRB
HAST
Pressure Pot
Temperature
Cycle
Standard
Note A: The reliability data presents total of available generic data up to the published date.
IV. Reliability Evaluation
FIT rate (per billion): 8
MTTF = 14871 years
The presentation of FIT rate for the individual product reliability is restricted by the actual
burn-in sample size of the selected product (AOC2800). Failure Rate Determination is based
on JEDEC Standard JESD 85. FIT means one failure per billion hours.
2
9
Failure Rate = Chi x 10 / [2 (N) (H) (Af)]
9
= 1.83 x 10 / [2x (2x2x77x500+2x2x77x1000) x258] = 8
9
8
MTTF = 10 / FIT = 1.30 x 10 hrs = 14871 years
Chi² = Chi Squared Distribution, determined by the number of failures and confidence interval
N = Total Number of units from HTRB and HTGB tests
H = Duration of HTRB/HTGB testing
Af = Acceleration Factor from Test to Use Conditions (Ea = 0.7eV and Tuse = 55°C)
Acceleration Factor [Af] = Exp [Ea / k (1/Tj u – 1/Tj s)]
Acceleration Factor ratio list:
Af
55 deg C
70 deg C
85 deg C
100 deg C
115 deg C
130 deg C
150 deg C
258
87
32
13
5.64
2.59
1
Tj s = Stressed junction temperature in degree (Kelvin), K = C+273.16
Tj u = The use junction temperature in degree (Kelvin), K = C+273.16
-5
K = Boltzmann’s constant, 8.617164 X 10 eV / K