Patent ID: 7186609
Filing Date: 2007-03-06
Classification: H01L

Abstract:
1. A process of fabricating a trench junction barrier rectifier comprising: providing a semiconductor body of a first conductivity type; etching at least two trenches in a surface of the semiconductor body, leaving a mesa between the trenches, each of the trenches having a sidewall and a bottom; introducing a dopant of a second conductivity type into a first region of the semiconductor body adjacent the sidewall and the bottom of each of the trenches, leaving a second region of the mesa with a first conductivity type so as to form a PN junction between the first and second regions; filling the trenches with polysilicon; and depositing a metal layer on a surface of the mesa, wherein introducing the dopant comprises implanting atoms or molecules of the dopant through the sidewall and bottom of the each of the trenches, the dopant being implanted by tilting an implant beam of the dopant to facilitate introducing the atoms or molecules through the sidewall of each of the trenches.