Matrix wiring substrates
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United States of America Patent
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-
Mar 5, 1996
Grant Date -
N/A
app pub date -
May 27, 1993
filing date -
Jun 3, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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