scope:

This specification establishes the requirements for flexible printed-wiring (with or without shield(s) or stiffeners) and rigid and flexible printed-wiring combinations. The rigid and flexible printed-wiring combination hereinafter will be referred to as rigid-flex printed-wiring. In the rigid-flex application, the conductor layers that are in the flexible portion are also a layer in the rigid multilayer board.

The flexible and rigid-flex printed-wiring covered by this specification shall be of the following types and classes, as specified.

Type 1 - Singled-sided flexible material with or without shield(s) or stiffener (one conductor layer).

Type 2 - Double-sided flexible material with or without shield(s) or stiffener (two conductor layers) with plated-through holes.

Type 3 - Multilayer flexible material with or without shield(s) or stiffener (more than two conductor layers) with plated-through holes.

Type 4 - Multilayer rigid and flexible material combinations (more than two conductor layers), with plated-through holes.

Type 5 - Bonded rigid and/or flexible material combinations (more than one conductive layer) without plated-through holes.

Class A - Capable of withstanding flexing during installation.

Class B - Capable of withstanding continuous flexing for a number of cycles specified on the master drawing. (Generally not used for more than two conductor layers). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Electronic Systems Command, ATTN: ELEX 8111, Washington, DC 20363, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.