Patent ID: 6787432
Filing Date: 2004-09-07
Classification: H01L

Abstract:
A method of fabricating a semiconductor device having a semiconductor substrate, the method comprising:forming an internal circuitry on said semiconductor substrate, the internal circuitry executing a predetermined operation; forming a terminal on said semiconductor substrate, the terminal being connected to the internal circuitry and receiving an external signal; forming a protection circuitry on said semiconductor substrate, wherein the protection circuitry includes a transistor which has a first region of a first conductivity type, a second region of the first conductivity type and a third region of a second conductivity type, wherein the first region is connected to the terminal, wherein the second region is provided at a scribe line of said semiconductor substrate and wherein the third region is defined by a region between the first region and the second region; and protecting the internal circuitry from a surge voltage occurred at the terminal by using the transistor.