公开(公告)号：US20210226044A1

公开(公告)日：2021-07-22

申请号：US16745833

申请日：2020-01-17

申请人： GLOBALFOUNDRIES U.S. Inc.

发明人： Alexander Derrickson ,  Edmund K. Banghart ,  Alexander Martin ,  Ryan Sporer ,  Jagar Singh ,  Katherina Babich ,  George R. Mulfinger

IPC分类号： H01L29/737 ,  H01L29/08 ,  H01L29/10 ,  H01L29/165 ,  H01L29/66 ,  H01L21/02 ,  H01L21/324

摘要： Structures for a heterojunction bipolar transistor and methods of forming a structure for a heterojunction bipolar transistor. A first portion of a first semiconductor layer defines an emitter, a first portion of a second semiconductor layer defines a collector, and a base includes respective second portions of the first and second semiconductor layers that are laterally positioned between the first portion of the first semiconductor layer and the first portion of the second semiconductor layer. The first portion of the first semiconductor layer has a first thickness, and the first portion of the second semiconductor layer has a second thickness that is greater than the first thickness. The first portion and the second portion of the first semiconductor layer adjoin at a first junction having the first thickness. The first portion and the second portion of the second semiconductor layer adjoin at a second junction having the second thickness.