Patent ID: 8339758
Filing Date: 2012-12-25
Classification: H01L

Abstract:
1. A transient voltage suppressor, comprising: a semiconductor substrate of a first conductivity type having first and second opposing major surfaces; a first doped region of a second conductivity type formed from a first portion of the semiconductor substrate, the first doped region extending from the first major surface into the first portion of the semiconductor substrate and having first and second sides; a second doped region formed from a first portion of the first doped region, the second doped region of the first conductivity type; a third doped region of the first conductivity type extending into the first doped region from the first side, the third doped region and a first portion of the first doped region serving as a first localized breakdown region; a fourth doped region of the first conductivity type extending into the first doped region from the second side, the fourth doped region and a second portion of the first doped region serving as a second localized breakdown region; and a fifth doped region of the second conductivity type extending from the second major surface into the semiconductor substrate.