MIL-PRF-19500/270G
6
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as specified herein. If
alternate screening is being performed per MIL-PRF-19500, a sample of screened devices shall be submitted to and pass the
requirements of group A1 and A2 inspection only (table VIb, group B, subgroup 1 is not required to be performed again if group B has
already been satisfied per 4.4.2).
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with MIL-PRF-19500, and table I herein.
4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the conditions specified for subgroup testing in
table VIa (JANS) of MIL-PRF-19500 and 4.4.2.1. Electrical measurements (end-points) and delta requirements shall be in accordance
with group A, subgroup 2 and 4.5.9 herein. See 4.4.2.2 for JAN, JANTX, and JANTXV group B testing. Electrical measurements (end-
points) and delta requirements for JAN, JANTX, and JANTXV shall be after each step in 4.4.2.2 and shall be in accordance with group A,
subgroup 2 and 4.5.9 herein.
4.4.2.1 Group B inspection, table VIa (JANS) of MIL-PRF-19500.
Subgroup Method Condition
B4 1037 VCB = 10 V dc; TJ = 150
q
C, ton = toff = 3 minutes minimum for 2,000 cycles. No heat sink or forced-air
cooling on devices shall be permitted.
B5 1027 VCB = 10 V dc; TA = +125
q
C +25
q
C for 96 hours with PT adjusted according to the chosen TA to give an
average TJ = +275
q
C.
4.4.2.2 Group B inspection, (JAN, JANTX, and JANTXV). 1/
Step Method Condition
1 1039 Steady-state life: Test condition B, 340 hours, VCB = 10 -30 V dc, TJ = 150
q
C min. No heat sink or forced-
air cooling on the devices shall be permitted. n = 45 devices, c = 0
2 1039 The steady state life test of step 1 shall be extended to 1,000 hrs for each die design. Samples shall
be selected from a wafer lot every twelve months of wafer production. Group B step 2
shall not be required more than once for any single wafer lot. n = 45, c = 0.
3 1032 High-Temperature life (non-operating), t = 340 hours, TA = +200
q
C. n = 22, c = 0
1/ Separate samples may be used for each step. In the event of a group B failure, the manufacturer may pull a new sample at
double size from either the failed assembly lot or from another assembly lot from the same wafer lot. If the new “assembly lot” option is
exercised, the failed assembly lot shall be scrapped.
4.4.2.3 Group B sample selection. Samples selected from group B inspection shall meet all of the following requirements:
a. For JAN, JANTX, and JANTXV samples shall be selected randomly from a minimum of three wafers (or from each wafer in
the lot) from each wafer lot. For JANS, samples shall be selected from each inspection lot. See MIL-PRF-19500.
b. Must be chosen from an inspection lot that has been submitted to and passed group A, subgroup 2, conformance inspection.
When the final lead finish is solder or any plating prone to oxidation at high temperature, the samples for life test (subgroups
B4 and B5 for JANS, and group B for JAN, JANTX, and JANTXV) may be pulled prior to the application of final lead finish.
4.4.3 Group C inspection, Group C inspection shall be conducted in accordance with the conditions specified for subgroup testing in
table VII of MIL-PRF-19500, and in 4.4.3.1 (JANS).and 4.4.3.2 (JAN, JANTX, and JANTXV) herein for group C testing. Electrical
measurements (end points) and delta requirements shall be in accordance with group A, subgroup 2 and 4.5.9 herein.