MIL-STD-275E, MILITARY STANDARD: PRINTED WIRING FOR ELECTRONIC EQUIPMENT (31 DEC 1984) [SUPERSEDES MIL-STD-1495] [S/S BY IPC-2221 OR IPC-D-275]

MIL-STD-275E, MILITARY STANDARD: PRINTED WIRING FOR ELECTRONIC EQUIPMENT (31 DEC 1984) [SUPERSEDES MIL-STD-1495] [S/S BY IPC-2221 OR IPC-D-275]., This standard establishes design requirements governing rigid, single printed-wiring boards, double-sided printed -wiring boards, multi-layered printed-wiring boards, printed-wiring assemblies constructed from those boards mentioned above, and design considerations for mounting of parts and assemblies thereon. The design criteria (such as electrical spacings) contained in this standard are predicated on the requirement that end item assemblies [circuit card assemblies, printed-wiring assemblies, back planes, mother boards) shall be conformally coated (see 6.3.1). Conformal coating shall be in accordance with MIL-I-45059.