Invention Grant
- Patent Title: Dual hard mask lithography process
- Patent Title (中): 双硬掩模光刻工艺
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Application No.: US14140060Application Date: 2013-12-24
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Publication No.: US09373580B2Publication Date: 2016-06-21
- Inventor: John C. Arnold , Sean D. Burns , Steven J. Holmes , David V. Horak , Muthumanickam Sankarapandian , Yunpeng Yin
- Applicant: GLOBALFOUNDRIES INC.
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L23/522 ; G03F7/00 ; G03F7/09 ; H01L21/768 ; H01L21/033 ; H01L21/311 ; H01L21/308

Abstract:
A first metallic hard mask layer over an interconnect-level dielectric layer is patterned with a line pattern. At least one dielectric material layer, a second metallic hard mask layer, a first organic planarization layer (OPL), and a first photoresist are applied above the first metallic hard mask layer. A first via pattern is transferred from the first photoresist layer into the second metallic hard mask layer. A second OPL and a second photoresist are applied and patterned with a second via pattern, which is transferred into the second metallic hard mask layer. A first composite pattern of the first and second via patterns is transferred into the at least one dielectric material layer. A second composite pattern that limits the first composite pattern with the areas of the openings in the first metallic hard mask layer is transferred into the interconnect-level dielectric layer.
Public/Granted literature
- US20140110846A1 DUAL HARD MASK LITHOGRAPHY PROCESS Public/Granted day:2014-04-24
Information query
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