Patent ID: 8889528
Filing Date: 2014-11-18
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor component, comprising: providing a semiconductor material of a first conductivity type and having a major surface; forming one or more trenches in the semiconductor material of the first conductivity type, the one or more trenches extending from the major surface into the semiconductor material of the first conductivity type, wherein each trench of the one or more trenches has a sidewall and a floor, and wherein the semiconductor material of the first conductivity type serves as the sidewall and the floor; forming a layer of intrinsic semiconductor material in direct contact with the sidewall and the floor of the one or more trenches, the intrinsic semiconductor material a separate material from the semiconductor material of the first conductivity type and the sidewall and the floor not formed by the layer of intrinsic material; forming a first layer of semiconductor material on the layer of intrinsic material, wherein a first portion of the first layer of semiconductor material adjacent the sidewall serves to balance charge in a first direction and a second portion of the first layer of semiconductor material serves to balance charge in a second direction; and forming an electrically conductive material in contact with the semiconductor material and the first layer of semiconductor material, wherein providing the semiconductor material of a first conductivity type includes providing a semiconductor substrate of the first conductivity type and a first dopant concentration having an epitaxial layer formed thereon, the epitaxial layer of the first conductivity type and a second dopant concentration, the second dopant concentration less than the first dopant concentration, wherein forming the one or more trenches includes: forming a first trench having a floor and first and second opposing sidewalls; and forming a second trench having a floor and first and second opposing sidewalls, wherein the second sidewall of the first trench is spaced apart from the first sidewall of the second trench by a first lateral distance, and wherein a first figure of merit is a product of the first lateral distance and the second dopant concentration, wherein forming the first layer of semiconductor material includes selectively growing the first layer of semiconductor material on the floors and the first and second sidewalls of the first and second trenches, the first layer of semiconductor material of a second conductivity type and having a third dopant concentration, a portion of the first layer of semiconductor material on the first sidewall having a first lateral thickness, wherein a second figure of merit is a product of the first lateral thickness and the third dopant concentration, and wherein the first figure of merit is substantially twice the second figure of merit.