METHOD FOR FORMING FIN FIELD EFFECT TRANSISTOR DEVICE STRUCTURE

    公开(公告)号:US20210313443A1

    公开(公告)日:2021-10-07

    申请号:US16837465

    申请日:2020-04-01

    IPC分类号: H01L29/66 H01L21/02

    摘要: A method for forming a fin field effect transistor device structure includes forming a fin structure over a substrate. The method also includes forming a gate structure across the fin structure. The method also includes forming a source/drain recess adjacent to the gate structure. The method also includes wet cleaning the source/drain recess in a first wet cleaning process. The method also includes treating the source/drain recess with a plasma process. The method also includes wet cleaning the source/drain recess in a second wet cleaning process after treating the source/drain recess via the plasma process. The method also includes growing a source/drain epitaxial structure in the source/drain recess.

    METHOD OF FORMING EPITAXIAL FIN STRUCTURES OF FINFET

    公开(公告)号:US20200321450A1

    公开(公告)日:2020-10-08

    申请号:US16908057

    申请日:2020-06-22

    摘要: A method of forming a semiconductor device having first and second fin structures on a substrate includes forming a first epitaxial region of the first fin structure and forming a second epitaxial region of the second fin structure. The method further includes forming a buffer region on the first epitaxial region of the first fin structure and performing an etch process to etch back a portion of the second epitaxial region. The buffer region helps to prevents etch back of a top surface of the first epitaxial region during the etch process. Further, a capping region is formed on the buffer region and the etched second epitaxial region.