Invention Grant
- Patent Title: Multi-landing contact etching
- Patent Title (中): 多层接触蚀刻
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Application No.: US14280911Application Date: 2014-05-19
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Publication No.: US09006809B2Publication Date: 2015-04-14
- Inventor: Fei Xie , Wen Cheng Tien , Ya Ping Chen , Li Bin Man , Kuo Jung Chen , Yu Liu , Tian Yi Zhang , Sisi Xie
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Jacqueline J. Garner; Frank Cimino
- Main IPC: H01L27/108
- IPC: H01L27/108 ; H01L29/94 ; H01L29/78 ; H01L21/8234 ; H01L21/768 ; H01L29/417 ; H01L29/423 ; H01L29/66 ; H01L29/45 ; H01L29/49

Abstract:
A method for contacting MOS devices. First openings in a photosensitive material are formed over a substrate having a top dielectric in a first die area and a second opening over a gate stack in a second die area having the top dielectric, a hard mask, and a gate electrode. The top dielectric layer is etched to form a semiconductor contact while etching at least a portion the hard mask layer thickness over a gate contact area exposed by the second opening. An inter-layer dielectric (ILD) is deposited. A photosensitive material is patterned to generate a third opening in the photosensitive material over the semiconductor contact and a fourth opening inside the gate contact area. The ILD is etched through to reopen the semiconductor contact while etching through the ILD and residual hard mask if present to provide a gate contact to the gate electrode.
Public/Granted literature
- US20140252457A1 MULTI-LANDING CONTACT ETCHING Public/Granted day:2014-09-11
Information query
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