Reliability Report

AOS Semiconductor
Product Reliability Report
AON4407,
rev B
Plastic Encapsulated Device
ALPHA & OMEGA Semiconductor, Inc
www.aosmd.com
This AOS product reliability report summarizes the qualification result for AON4407.
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 AON4407
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 AON4407 uses advanced trench technology to provide excellent RDS(ON), low gate charge
and operation with gate voltages as low as 1.8V. This device is suitable for use as a load
switch.
-RoHS Compliant
-Halogen Free
Detailed information refers to datasheet.
II. Die / Package Information:
AON4407
Standard sub-micron
Low voltage P channel
Package Type
DFN 3x2A
Lead Frame
Copper
Die Attach
Silver epoxy
Bonding Wire
Au wire
Mold Material
Epoxy resin with silica filler
MSL (moisture sensitive level) Level 1 based on J-STD-020
Process
Note * based on information provided by assembler and mold compound supplier
III. Result of Reliability Stress for AON4407
Test Item
Test Condition
Time
Point
MSL
Precondition
168hr 85°c
/85%RH +3 cycle
[email protected]°c
-
HTGB
Temp = 150°°c,
Vgs=100% of
Vgsmax
168hrs
500 hrs
1000 hrs
Lot
Attribution
Total
Sample
size
Number
of
Failures
11 lots
1815pcs
0
JESD22A113
77pcs
0
JESD22A108
0
JESD22A108
605pcs
0
JESD22A110
1 lot
(Note A*)
HTRB
Pressure Pot
Temperature
Cycle
77pcs / lot
Temp = 150°°c,
Vds=80% of
Vdsmax
168hrs
500 hrs
1000 hrs
130 +/- 2°°c,
85%RH, 33.3 psi,
Vgs = 100% of
Vgs max
121°°c, 29.7psi,
RH=100%
100 hrs
11 lots
96 hrs
(Note A*)
11 lots
55pcs / lot
605pcs
0
JESD22A102
-65°°c to 150°°c,
air to air
250 / 500
cycles
(Note A*)
11 lots
55pcs / lot
605pcs
0
JESD22A104
(Note A*)
55pcs / lot
77pcs
1 lot
(Note A*)
HAST
Standard
77pcs / lot
Note A: The reliability data presents total of available generic data up to the published date.
IV. Reliability Evaluation
FIT rate (per billion): 46
MTTF = 2478 years
The presentation of FIT rate for the individual product reliability is restricted by the actual
burn-in sample size of the selected product (AON4407). Failure Rate Determination is based
on JEDEC Standard JESD 85. FIT means one failure per billion hours.
2
9
9
Failure Rate = Chi x 10 / [2 (N) (H) (Af)] = 1.83 x 10
9
7
MTTF = 10 / FIT = 2.17 x 10 hrs = 2478 years
/ [2x (2x77x500) x258] = 46
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