MIL-PRF-50884 Printed Wiring Board, Flexible Or Rigid-Flex, General Specification ForThis specification establishes the performance and qualification requirements for flexible and rigid-flex printed wiring boards with or without plated through holes \(see 6.1\). Verification is accomplished through the use of one of two methods of product assurance \(appendix A or appendix B\). Detail requirements, specific characteristics, and other provisions which are sensitive to the particular intended use are specified in the applicable master drawing.

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MIL�PRF�50884F

APPENDIX E

E.3.2 Reciprocal qualification from MIL�PRF�31032. A reciprocal qualification listing (i.e., from a technology

qualified to a MIL�PRF�31032 specification sheet) to this appendix will depend on the level of QML technology

qualified. Unless otherwise detailed in MIL�PRF�31032 qualification test plan, following guidelines will apply:

Printed wiring board type (see 6.4.3 and D.3.5). The extent of qualification for base materials types

defined in E.4 will apply. EXAMPLE: A type 2 qualification under a MIL�PRF�31032 specification sheet

will not justify a type 4 qualification listing to this appendix.

Printed board material. The extent of qualification for base materials types defined in MIL�PRF�31032 will

apply. EXAMPLE: An adhesiveless flexible metal clad base material qualification under a MIL�PRF�

31032 specification sheet will justify an adhesiveless flexible metal clad base material qualification listing

to this appendix (of the corresponding type).

Complexity. Printed wiring board designs verified using the QML product assurance option shall flow

through the conversion of customer requirements element of the approved Quality Management (QM) plan

as described in MIL�PRF�31032, appendix A. The Technical Review Board (TRB) shall evaluate designs

exceeding their current QML�31032 qualification listing to determine if the add�on qualification provisions of

MIL�PRF�31032 shall be used. Reasons for not using the add�on qualification provisions shall be

documented in the periodic status reports.

E.3.3 Retention (see B.6.4). The QML status report described in MIL�PRF�31032 will cover the retention

requirements to this appendix.

E.4 EXTENT OF QUALIFICATION

E.4.1 General. The extent of qualification shall be in accordance with the following ranges specified in E.4.1.1

E.4.1.1 Printed wiring board type. Qualification of a particular printed wiring board type shall be extended to cover

all conductor patterns of that same printed wiring board type produced.

Qualification of type 4 printed wiring boards shall be extended to cover all other types (5, 3, 2, and 1).

Qualification of type 3 printed wiring boards shall be extended to cover types 1 and 2 printed wiring boards.

Qualification of type 2 printed wiring boards shall be extended to cover type 1 printed wiring boards.

Qualification of type 5 printed wiring boards shall be extended to cover type 1 printed wiring boards.

Qualification of any type shall be extended to cover the approved type or types with a stiffener.

E.4.1.2 Installation use. Qualification to installation use B shall be extended to cover installation use A. If not

qualifying installation use B, installation use A shall be qualified.

E.4.1.3 Rework capability. Qualification to rework capability grade R shall be extended to cover rework capability

E.4.1.4 Base materials. All flexible and rigid base materials to be used in sunsequent production shall be qualified.