Stress relieved printed wiring board

Details Stress relieved printed wiring board Stress relieved printed wiring board

1976-07-01

1978-04-25

Reynolds, Bruce A.

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

29626, 361398, H05K 108

Patent

active

040864260

ABSTRACT:
A board of dielectric material having printed electrical circuitry on at least one side thereof with at least one mounting pad and a hole through the board in the center of the mounting pad for receiving the connecting lead of a component with a stress relief hole, having a diameter larger than the diameter of the mounting pad, extending from the surface opposite the electrical circuitry, coaxial with the mounting hole and to within a short distance of the surface carrying the mounting pad to permit minute motions of the circuit and component connected thereto and provide the necessary stress relief for thermal expansion differentials of connecting lead and board materials.

REFERENCES:
patent: 3239895 (1966-03-01), Stuckert
patent: 3290558 (1966-12-01), Sapy
patent: 3321570 (1967-05-01), Webb
patent: 3345622 (1967-10-01), Matsushita

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