MIL-PRF-19500/291W
4.3.1 Screening (JANHC and JANKC). Screening of JANHC and JANKC die shall be in accordance with
MIL-PRF-19500, "Discrete Semiconductor Die/Chip Lot Acceptance". Burn-in durat ion for the JANKC level follows
JANS requirements; the JANHC follows JANTX requirements.
4.3.2 Power burn-in conditions. Power burn-in conditions ar e as follow s: VCB = -10 to -30 V dc. Power shall be
applied to ac hieve TJ = +135°C minimum using a minimum PD = 75 percent of PT maximum, TA ambi ent ra ted as
defined in 1.3. With approval of the qualifying activity and preparing activity, alt ern ate bur n -in criteria (hours, bias
conditions, TJ, and mounting conditions) for JANTX and JANTXV quality levels may be used. A justification
demonstrating equivalence is required. In addition, the manu facturing sit e’ s burn-in data and performance history will
be essential criteria for burn-in modification approval.
4.3.3 Thermal impedance measurements). The thermal impedance measurements shall be performed in
accordance with method 3131 of MIL-STD-750 using the gui d elin es in that meth od for deter mini ng IM, IH, tH, and tMD
(and VC where appropriate). The thermal impedance limit used in screen 3c of 4.3 herein and subgroup 2 of table I
shall comply with the thermal impedance graph s in figur es 1 2, 13, 14, 15, and 16 (less than or equal to the curve
value at the same tH time) and shall be less than the proc ess determined statistical maximum limit as outlined in
method 3131. See table III, subgroup 4 herein.
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as
specified herein. If alternate screening is being performed in accordance with MIL-PRF-19500, a sample of screened
devices shall be submitted to and pass the requirements of subgroups 1 and 2, of table I herein, inspection only
(table E-VIb, group B, subgroup 1 is not required to be performed again if group B has already been satisfied in
accordance with 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 Gro up B inspe ctio n. Group B inspection shall be conducted in accordance with the conditions specified for
subgroup test ing in table E-VIa (JANS) of MIL-PRF-19500 and 4.4.2.1 herein. Electrical measurements (end-points)
and delta requirements shall be in accordance with table I, subgr ou p 2 and 4.5.3 herein. See 4.4.2.2 herein for JAN,
JANTX, and JANTXV, group B testing. Electrical measurements (end-points) and delt a requir ements for JAN,
JANTX, and JANTXV, shall be after each step in 4.4.2.2 and shall be in accordance with table I, subgroup 2 and
4.5.3 herein.
4.4.2.1 Group B inspection, table E-VIa (JANS) of MIL-PRF-19500.
Subgroup Method Condition
B4 1037 VCB = -10 to -30 V dc. Adjus t dev ice current, or pow er, to achiev e a minim um
∆TJ of 100°C.
B5 1027 VCB = -10 V dc; PD ≥ 100 percent of maximum rated PT (see 1.3). (NOTE: If a failure
occurs, resubmission shall be at the test conditions of the original sample.)
Option 1: 96 hours minimum sample size in accordance with MIL-PRF-19500,
table E-VIa, adjust TA or PD to achi ev e TJ = +275°C minimum.
Option 2: 216 hours minimum, sample size = 45, c = 0; adjusted TA or PD to achiev e a
TJ = +225°C minimum.
B6 3131 RθJA, RθJC only (see 1.3).