Matrix wiring substrates

Details Matrix wiring substrates Matrix wiring substrates

1993-05-27

1996-03-05

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082579, 345 92, 345904, 359 54, 359 59, 257 59, 257452, H04Q 118

Patent

active

054971462

ABSTRACT:
A matrix wiring substrate is provided which can perform an electrostatic countermeasure until drive circuits are connected to a matrix wiring substrate, whereby the circuit wiring can be inspected at an earlier stage. The matrix wiring substrate, where circuit wiring is formed over a substrate, includes a guard ring formed around the circuit wiring and connected to the circuit wiring, and separable portions arranged between the circuit wiring and the guard ring for controlling the conduction between the circuit wiring and the guard ring. Since the circuit wiring is conducted with the guard ring by effecting externally the separable portion, lines of the circuit wiring are short-circuited electrically. No potential difference between the wires causes any electric discharge, thus resulting in increased manufacturing yield.

REFERENCES:
patent: 4457588 (1984-07-01), Yasukawa
patent: 4940934 (1990-07-01), Kawaguchi et al.
patent: 5019002 (1991-05-01), Holmberg
patent: 5068748 (1991-11-01), Ukai et al.
patent: 5168382 (1992-12-01), Tsujikawa
patent: 5184235 (1993-02-01), Sukegawa
patent: 5212573 (1993-05-01), Yamazaki
patent: 5220443 (1993-06-01), Noguchi
patent: 5233448 (1993-08-01), Wu

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