Patent ID: 7339203

Claim:
A thyristor, comprising: a semiconductor substrate of a second conductivity type having first and second sides; a first mesa structure extending from the first side, the first mesa structure having a mesa surface and first and second sidewalls, the first sidewall of the first mesa structure extending from a first portion of the first side to the mesa surface of the first mesa structure and the second sidewall of the first mesa structure extending from a second portion of the first side to the mesa surface of the first mesa structure; a second mesa structure extending from the second side, the second mesa structure having a mesa surface and first and second sidewalls, the first sidewall of the second mesa structure extending from a first portion of the second side to the mesa surface of the second mesa structure and the second sidewall of the second mesa structure extending from a second portion of the second side to the mesa surface of the second mesa structure; a first doped region of a first conductivity type in the first mesa structure, wherein the first doped region has a first boundary laterally spaced apart from the first sidewall and a second boundary laterally spaced apart from the second sidewall, wherein the first doped region laterally extends beyond the first mesa structure and extends to the mesa surface of the first mesa structure; and a second doped region of a first conductivity type in the second mesa structure, wherein the second doped region has a first boundary laterally spaced apart from the first sidewall and a second boundary laterally spaced apart from the second sidewall, wherein the first doped region laterally extends beyond the first mesa structure and extends to the mesa surface of the second mesa structure.