PRINTED WIRING BOARDS, DIELECTRIC STRENGTH OF

Corona and breakdown voltage information is presented for use in the design of printed wiring boards for high altitude applications. The complete mass of raw data is published in addition to the recommended conductor spacings, because of requests by design engineers who prefer to review the raw data and set their own safety factors for each particular design application. Recommended spacings between the conductors on printed wiring boards were established. The corona discharge and dielectric breakdown voltages were measured for each of ten different spacings: .010, .015, .022, .025, .032, .062, .093, .125, .187, and . 250 inches.