Invention Grant
- Patent Title: EUV pattern transfer with ion implantation and reduced impact of resist residue
-
Application No.: US16177881Application Date: 2018-11-01
-
Publication No.: US10658180B1Publication Date: 2020-05-19
- Inventor: Yann Mignot , Yongan Xu , Oleg Gluschenkov
- Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Tutunjian & Bitetto, P.C.
- Agent Vazken Alexanian
- Main IPC: H01L21/033
- IPC: H01L21/033 ; H01L21/3115 ; G03F7/20 ; H01L21/311 ; H01L21/308

Abstract:
A method is presented for amplifying extreme ultraviolet (EUV) lithography pattern transfer into a hardmask and preventing hard mask micro bridging effects due to resist residue in a semiconductor structure. The method includes forming a top hardmask over an organic planarization layer (OPL), depositing a photoresist over the top hardmask, patterning the photoresist using EUV lithography, performing ion implantation to create doped regions within the exposed top hardmask and regions of hardmask underneath resist residue, stripping the photoresist, and selectively etching the top hardmask by either employing positive tone or negative tone etch based on an implantation material.
Information query
IPC分类: