公开(公告)号：US20170200792A1

公开(公告)日：2017-07-13

申请号：US14993537

申请日：2016-01-12

Applicant: GLOBALFOUNDRIES Inc.

Inventor： Chang Ho MAENG ,  Andy WEI ,  Anthony OZZELLO ,  Bharat KRISHNAN ,  Guillaume BOUCHE ,  Haifeng SHENG ,  Haigou HUANG ,  Huang LIU ,  Huy M. CAO ,  Ja-Hyung HAN ,  SangWoo LIM ,  Kenneth A. BATES ,  Shyam PAL ,  Xintuo DAI ,  Jinping LIU

IPC: H01L29/40 ,  H01L21/02 ,  H01L21/28 ,  H01L29/423

CPC classification number: H01L29/401 ,  H01L21/02126 ,  H01L21/02282 ,  H01L21/28229 ,  H01L29/41791 ,  H01L29/4232 ,  H01L29/78

Abstract: Methods of MOL S/D contact patterning of RMG devices without gouging of the Rx area or replacement of the dielectric are provided. Embodiments include forming a SOG layer around a RMG structure, the RMG structure having a contact etch stop layer and a gate cap layer; forming a lithography stack over the SOG and gate cap layers; patterning first and second TS openings through the lithography stack down to the SOG layer; removing a portion of the SOG layer through the first and second TS openings, the removing selective to the contact etch stop layer; converting the SOG layer to a SiO2 layer; forming a metal layer over the SiO2 layer; and planarizing the metal and SiO2 layers down to the gate cap layer.