Patent ID: 6365939
Filing Date: 2002-04-02
Classification: H01L

Abstract:
A semiconductor device, comprising:a semiconductor substrate of a first conductivity type; a well region of the first conductivity type formed on said semiconductor substrate; a MOS transistor of a second conductivity type formed in said well region of the first conductivity type; a well region of the second conductivity type formed adjacent said well region of the first conductivity type; and a first protection element and a second protection element connected to a gate electrode of said MOS transistor, said first protection element comprising a pn junction type diode formed from said well region of the first conductivity type and a diffusion region of the second conductivity type provided in said well region of the first conductivity type, while said second protection element comprises another pn junction type diode formed from said well region of the second conductivity type and a diffusion region of the first conductivity type provided in said well region of the second conductivity type; and an interface between said well region of the second conductivity type and said semiconductor substrate, wherein the perimetric length L of said wire antenna connected to said second protection element as represented in a unit of micrometer, the wire distance D of said wire to an adjacent wire as represented in a unit of micrometer and the area S1 of said interface between said well region of the second conductivity type and said semiconductor substrate as represented in a unit of square micrometer satisfy the relationship of S1&gE;L/(250D).