Patent ID: 8338854

Claim:
A transient voltage suppressing (TVS) device comprising: a semiconductor substrate of a first conductivity type; an epitaxial layer of the first conductivity type disposed on top of said semiconductor substrate and a top dopant layer of a second conductivity type disposed at the top of said epitaxial layer; a buried dopant region of the second conductivity type disposed and encompassed in the epitaxial layer wherein said buried dopant region interfacing with underlying portions of said epitaxial layer thus constituting a Zener diode for said TVS device; and a first contact region of the first conductivity type disposed at the top of said top dopant layer over said buried dopant region for constituting a semiconductor controlled rectifier (SCR) functioning as a first steering diode, wherein said SCR comprises vertically of the first contact region, the top dopant layer, the epitaxial layer, and the buried dopant region.