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In-House Screening Options for 'Mil Processed' Conformance

QR204: Discrete Component Screening (with reference to MIL-STD-750)
   Description MIL-STD-750
method
Conditions JQR-A JQR-B
1 Internal Visual
(Precap) Inspection
2069
2070
2072
  100% n/a
2 High temperature
stabilisation bake
1032 24 hrs min at rated
maximum storage temperature
100% 100%
3 Temperature
Cycling
1051 20 cycles at -55°C to +175°C or
max storage temp (whichever is lower)
with minimum 10 minutes dwell tim
100% 100%
4 Constant
acceleration
2006 20,000G force in Y1axis for
1 min duration (see note 2)
100% 100%
7 Hermeticity

a) Fine


b) Gross



1071


1071


Test condition H. Max leak rate =5x10-8 atm cc/s, (5x10-7 atm cc/s for internal cavity < 0.3cc)

Condition C


100%


100%


100%


100%
9 Interim electrical     100% 100%
10 High temperature reverse bias

a) Bipolar

b) Power MOSFET

c) Diodes


1039

1042

1038


Test Condition A

Test Condition B

Test Condition C
100% 100%
11 Interim electrical   Group A (read & record) 100% 100%
12 Power burn-in

a) Bipolar

b) Power MOSFET

c) Diodes


1039

1042

1038


Test Condition B - 160 hrs min.

Test Condition A - 160 hrs min.

Test Condition B - 96 hrs min.
100% 100%
13 Final electrical   Group A
Read & Record + Drift chck (1)
100% 100%

Notes:

  1. Group A end point tests are DC functional / parametric at 25°C (subgroup 2) of QR205.
  2. 10000G force for devices with power rating >10 watts at Tc=25°C.
  3. PDA (percentage defects allowable) is 10% between steps 9 & 11 and 11& 13.

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