Patent ID: 7551417
Filing Date: 2009-06-23
Classification: G02F,G09G,H04R

Abstract:
1. A thin film circuit substrate having an insulative substrate and a thin film layer provided on the insulative substrate, the thin film layer having at least part of a circuit section provided thereon, the thin film circuit substrate comprising: an antisurge element, provided on the insulative substrate and on a wiring between the circuit section and an input terminal section or an output terminal section of the circuit section, for removing excess charges from the wiring when a voltage exceeding a predetermined range is applied to the wiring; wherein said antisurge element has a first MOS transistor formed of said thin film layer; and the first MOS transistor is arranged such that a gate terminal is connected to the wiring, and a source terminal or a drain terminal is grounded, the first MOS transistor having a gate insulation film provided so that the amount of a leakage current flowing from a gate electrode to a channel region sharply increases with an increase of a voltage applied to the wiring.