The effects of wafer topography after STI fill on ceria slurry CMP for beyond 110nm generation

Shing Yih Shih, Jian Jang Cheng, Chi Hsiang Kuo, Chang Rang Wu, Jeng Ping Lin, Pei Ing Lee

Research output: Contribution to conferenceConference Paperpeer-review

Abstract

As chip size shrinkage, similar to the pattern density effect, topography effect of STI structure would also strongly influence CMP performance due to STI filling process getting complication. In this paper, the STI topography effect on SiN erosion of direct ceria slurry CMP was studied on four different STI topography structures created by three different fill approaches on 110nm ground rule with AR∼4 and ∼8, in respectively. Besides, the performances of two kinds of ceria slurry with different selectivity of oxide to SiN were also compared.

Original languageEnglish
Pages197-200
Number of pages4
StatePublished - 2005
Externally publishedYes
Event22nd International VLSI Multilevel Interconnection Conference, VMIC 2005 - Fremont, CA, United States
Duration: 04 10 200506 10 2005

Conference

Conference22nd International VLSI Multilevel Interconnection Conference, VMIC 2005
Country/TerritoryUnited States
CityFremont, CA
Period04/10/0506/10/05

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