MIL-PRF-19500P
APPENDIX E
TABLE E-IX. Group E inspections (all quality levels).
Inspections
MIL-STD-750
Sample
plan
Method
Condition
Subgroup 1
45 devices,
c = 0 or as
Thermal shock or
1056
100 cycles or as specified.
specified.
Temperature cycling
1051
500 cycles minimum or as specified. Test condition C or max storage temp,
which ever is less.
Hermetic seal
1071
As applicable.
a. Fine leak
b. Gross leak
Electrical measurements
Group A, subgroup 2.
Subgroup 2
45 devices,
c = 0 or as
specified.
1037
As specified.
Intermittent operating life
Group A, subgroup 2.
Electrical measurements
or
Life test
1042
Condition A, B, C, or D.
Electrical measurements
Group A, subgroup 2.
or
Steady-state operating life
1026
As specified.
Electrical measurements
Group A, subgroup 2.
or
Blocking life
1048
As specified.
Electrical measurements
Group A, subgroup 2.
Subgroup 3
Not applicable
Subgroup 4
Thermal impedance curves N/A
Each supplier shall submit a thermal impedance (ZθJX) histogram of the entire N/A
(as applicable)
qualification lot. The histogram data shall be taken prior to the removal of
devices that are atypical for thermal impedance. Thermal impedance curves
(from ZθJX test pulse time to RθJX minimum steady-state time) of the best
device in the qual lot and the worst device in the qual lot (that meets the
supplier proposed screening limit), or from the thermal grouping, shall be
submitted. The optimal test conditions and proposed initial thermal impedance
screening limit shall be provided in the qualification report. Data indicating how
the optimal test conditions were derived for ZθJX shall also be submitted. The
proposed specification maximum thermal impedance curve shall be submitted.
The qualifying activity may approve a different ZθJX limit not to exceed the
specification's thermal curve for conformance inspection end-point
measurements as applicable. The supplier shall support (with applicable data)
their ZθJX end-point limit proposal when it exceeds the screening ZθJX limit. A
delta (read and record) ZθJX shall be determined by the manufacturer and
approved by the qualifying activity for all case mounted devices for
conformance inspection (intermittent life test and temperature cycling) end-
point measurements. Any exceptions shall be justified to, and approved by,
the qualifying activity. Equivalent data, procedures, or SPC plans may be used
for part, or all, of the above requirements.
See footnotes at end of table.
119
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business