Showing papers on "Flexible electronics published in 1972"

Electronic module using flexible printed circuit board with heat sink means

Abstract: An electronic circuit component having particular utility in multi-layer circuit board construction formed essentially of a flexible dielectric sheet of material used as the board base to which is attached circuit runs etched from copper sheets clad to the dielectric sheet prior to etching. Generally, circuitry runs are separated according to alignment with either the X or Y axis with the runs on each side of the dielectric sheet being parallel to only one of those axes. Integration of communication between X and Y runs is by means of plated through holes to which circuit elements may be attached. Flatpack integrated circuits are attached to the board oriented with their covers toward and their heat sink base portions away from the board. By placing all flatpacks on one side of the flexible board structure and looping the structure back on itself, a high circuit component density can be achieved with the heat sink portions of flatpacks exposed exteriorly of the loops of the structure facilitating placing the flatpacks in heat conducting contact with a casing.

Flexible printed wiring switch

Abstract: An electrical switch formed of a single flexible printed wiring element having a plurality of circuits to be selectively coupled and a shorting circuit. The flexible printed wiring element is folded upon itself such that the circuits to be coupled and the shorting circuit are facing. An actuator is provided to selectively urge the shorting circuit into and out of contact with the circuits to be coupled. Sliding and pushbutton embodiments of the invention are described.