公开(公告)号：US09634084B1

公开(公告)日：2017-04-25

申请号：US15040477

申请日：2016-02-10

Applicant: GLOBALFOUNDRIES INC.

Inventor： Christopher D. Sheraw ,  Chengwen Pei ,  Eric T. Harley ,  Yue Ke ,  Henry K. Utomo ,  Yinxiao Yang ,  Zhibin Ren

IPC: H01L29/78 ,  H01L29/06 ,  H01L21/324 ,  H01L29/66 ,  H01L29/417

CPC classification number: H01L29/0615 ,  H01L21/02381 ,  H01L21/0245 ,  H01L21/02513 ,  H01L21/02532 ,  H01L21/02639 ,  H01L21/324 ,  H01L29/41791 ,  H01L29/66795 ,  H01L29/66803 ,  H01L29/785

Abstract: Fin-type transistor fabrication methods and structures are provided which include, for example, providing a gate structure extending at least partially over a fin extended above a substrate structure, the gate structure being disposed adjacent to at least one region of the fin; disposing a protective film conformally over the gate structure and over the at least one region; modifying the protective film over the at least one region of the fin to form a conformal buffer layer, wherein the modifying selectively alters a crystalline structure of the protective film over the at least one region which thereby becomes the conformal buffer layer, without altering the crystalline structure of the protective film disposed over the gate structure; and removing the un-altered protective film over the gate structure, leaving the conformal buffer layer over the at least one region to form a source region and a drain region of the fin-type transistor.