MILPRF50884F
APPENDIX A
A.3.7.6.3 Thermal shock. While undergoing the test specified in A.4.8.6.3, a resistance change of 10 percent or
more between the first and last high temperature measurements shall be considered a reject. After the test, the
printed wiring board test specimens shall meet the following requirements:
External visual and dimensional inspection (all types): When inspected as specified in A.4.8.1, there shall
a.
be no evidence of plating cracks, blistering, or delamination in excess of that allowed in A.3.5.1.3.
b.
Internal visual and dimensional inspection (types 3 and 4): When the printed wiring board test specimen is
microsectioned and inspected in accordance with A.4.8.2, the requirements specified in A.3.6 shall be met.
A.3.8 Marking.
A.3.8.1 Product identification and test vehicle traceability codes. Unless otherwise specified (see A.6.2), each
production printed wiring board, each qualification test specimen, and each set of quality conformance test circuit
strips (as opposed to each individual test coupon) shall be marked as specified (see A.3.1.1) and herein. As a
minimum, each production printed wiring board, qualification test specimen, or quality conformance test circuit strip
shall be marked with the printed wiring board manufacturers' CAGE code (see 6.4.5), lot date code (see A.3.8.5), and
traceability code (see A.7.15). Additional marking on the printed wiring boards is allowed provided it does not
interfere with the required marking.
A.3.8.2 Legend. Legends on printed wiring boards shall be as specified (see A.3.1.1).
A.3.8.3 Methods of producing legend and marking. Legend and marking shall be produced by one of the following
methods: the same process used in producing the conductive pattern; or the use of a fungistatic ink or paint applied
to the printed wiring board; or on a label which is applied to the printed wiring board; or by a mechanical pencil,
mechanical machining, or laser machining on a metallic area provided for marking purposes. Conductive legends or
marking shall be no closer to the conductive pattern of the printed wiring board than the spacing requirements
specified (see A.3.1.1).
A.3.8.4 Marking legibility. All marking shall be able to withstand solder fluxes, cleaning solutions, and molten
solder encountered in the manufacture of printed wiring boards, shall remain legible after all tests, and in no manner
affect printed wiring board performance. After any or all tests, product identification or traceability marking shall
comply with the class 3, acceptable conditions specified in IPCA600.
A.3.8.5 Lot date code. The lot date code is a unique code to identify the period during which the printed wiring
boards were manufactured. Unless otherwise specified by the acquiring activity (see A.3.1.1), the first two numbers
in the lot date code shall be two digits of the number of the year, and the third and fourth number shall be two digits
indicating the calendar week of the year. When the number of the week is a single digit, it shall be proceeded by a
zero reading from left to right or from top to bottom, the code number shall designate the year and week, in that order.
35
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business