公开(公告)号：US20140120669A1

公开(公告)日：2014-05-01

申请号：US14149909

申请日：2014-01-08

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Satoshi EGUCHI ,  Yuya ABIKO ,  Junichi KOGURE

IPC: H01L29/66 ,  H01L21/02

CPC classification number: H01L29/7802 ,  H01L21/02639 ,  H01L21/26506 ,  H01L21/26566 ,  H01L29/0634 ,  H01L29/1095 ,  H01L29/161 ,  H01L29/165 ,  H01L29/41766 ,  H01L29/66712 ,  H01L29/66727 ,  H01L29/66734 ,  H01L29/7813 ,  H01L29/7842 ,  H01L29/7848

Abstract: In the manufacturing steps of a super-junction power MOSFET having a drift region having a super junction structure, after the super junction structure is formed, introduction of a body region and the like and heat treatment related thereto are typically performed. However, in the process thereof, a dopant in each of P-type column regions and the like included in the super junction structure is diffused to result in a scattered dopant profile. This causes problems such as degradation of a breakdown voltage when a reverse bias voltage is applied between a drain and a source and an increase in ON resistance. According to the present invention, in a method of manufacturing a silicon-based vertical planar power MOSFET, a body region forming a channel region is formed by selective epitaxial growth.