Electronic watch module and its method of fabrication

Details Electronic watch module and its method of fabrication Electronic watch module and its method of fabrication

1975-05-29

1976-10-19

Witkowski, Stanley J.

Electricity: conductors and insulators

Feedthrough or bushing

Compression

58 23R, 58 23BA, 29177, 174 52FP, 174 52PE, 357 70, 357 72, G04C 300, H05K 506

Patent

active

039863352

ABSTRACT:
An electronic watch module is fabricated by mounting a semiconductor integrated circuit chip on a metal lead frame. Connectors are utilized to connect the circuit to selected lead frame conductors. The semiconductor chip incorporates all of the electronic circuitry necessary to drive a display with decoded timekeeping signals. The lead frame includes selectively positioned conductors for connection of a display, a variable capacitor, oscillator crystal and battery contacts. The lead frame is plastic encapsulated with the plastic being formed to completely seal the integrated circuit and connectors while providing mechanical support cavities for the display, capacitor, crystal and batteries. Openings are also provided in the plastic within the cavities and opposite the cavity formations exposing the selectively positioned conductors so that the display, capacitor and crystal may be electrically connected to the lead frame. Lead frame conductors also extend about the periphery of the module for connection of time setting and/or display demand switches to the battery and circuit.

REFERENCES:
patent: 3759031 (1973-09-01), McCoullough et al.
patent: 3784725 (1974-01-01), Perkins et al.

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