Invention Grant
- Patent Title: Method of filling retrograde recessed features
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Application No.: US15914831Application Date: 2018-03-07
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Publication No.: US10410861B2Publication Date: 2019-09-10
- Inventor: Kandabara N. Tapily , Gerrit J. Leusink
- Applicant: Tokyo Electron Limited
- Applicant Address: JP Tokyo
- Assignee: Tokyo Electron Limited
- Current Assignee: Tokyo Electron Limited
- Current Assignee Address: JP Tokyo
- Main IPC: H01L21/02
- IPC: H01L21/02 ; H01L21/311

Abstract:
Methods for void-free material filling of fine recessed features have been disclosed in various embodiments. According to one embodiment, the method includes a) providing a substrate containing a recessed feature having an opening, a sidewall and a bottom, the sidewall including an area of retrograde profile relative to a direction extending from a top of the recessed feature to the bottom of the recessed feature, b) depositing an amount of a material in the recessed feature, the material having a greater thickness at the bottom than on the sidewall of the recessed feature, c) stopping the depositing in step b) before the recessed feature is fully filled with the material, d) etching a portion of the material from the recessed feature, and e) depositing an additional amount of the material to fully fill the recessed feature with the material without any voids in the recessed feature.
Public/Granted literature
- US20180261450A1 METHOD OF FILLING RETROGRADE RECESSED FEATURES Public/Granted day:2018-09-13
Information query
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