Patent ID: 6320229
Filing Date: 2001-11-20
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate of a first conductivity type;a first high-concentration layer of a second conductivity type formed in said semiconductor substrate;a second high-concentration layer of the second conductivity type formed in said semiconductor substrate in spaced relation to said first high-concentration layer, a reference voltage being applied to said second high-concentration layer;a conductive layer for providing an electrical connection between said first high-concentration layer and an input pad for inputting an input signal to an input circuit or to an input/output circuit;a first low-concentration layer of the second conductivity type formed in a region of said semiconductor substrate immediately underlying said first high-concentration layer; anda high-resistance conductive layer formed between said input pad and said first high-concentration layer to be connected in series with said conductive layer, said high-resistance conductive layer having a resistance value higher than that of said conductive layer.