Chemically amplifed resists based on the poly(1,4-dioxaspiro[4.4]nonane-2-methyl methacrylate) = 폴리(1,4-디옥사스피로[4.4]노난-2-메틸 메타크릴레이트)를 기본으로 하는 화학증폭형 레지스트

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The present study describes a novel class of ketal-protected chemically amplified positive deep UV photoresist. Poly(1,4-dioxaspiro[4.4]nonane-2-methyl methacrylate) (DNMMA) was synthesized and evaluated as a matrix polymer. The glass transition temperature and decomposition temperature of the polymer were 135℃ and 200℃, respectively. The absorbances were $0.015 \mum^{-1}$ at 248 nm and $0.163 \mum^{-1}$ at 193 nm. The ketal group of the polymer hydrolyzes under acid catalysis to give two alcohols and a ketone. The ketal polymer is insoluble in an aqueous developer, while the hydrolyzed products are soluble. The resist composed of the polymer and photoacid generator gave 0.34㎛ line/space patterns. In this polymer system to clarify the diffusion path, the effect of the remaining ketone after deprotection in the resist film was evaluated on the acid diffusion property for various post-baking temperature and protection levels. It was considered that the concentration of the remaining ketone after deprotection in the resist film corresponds to the acid diffusion paths. Based on the experimental analysis, it was found that the existence of the remaining ketone improves sensitivity by guiding diffusion channel. For enhancing dry etching resistance, we synthesized the copolymer composed of DNMMA and cholate based material, t-butylcholyl methacrylate (TBCMA). The etching rate of poly($TBCMA_{0.2}-co-DNMMA_{0.8}$) was 1.18 times that of novolac-based, so TBCMA was confirmed to have good dry etching resistance.
Advisors
Kim, Jin-Baekresearcher김진백researcher
Description
한국과학기술원 : 신소재공학과,
Publisher
한국과학기술원
Issue Date
1999
Identifier
156298/325007 / 000959503
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 신소재공학과, 1999.2, [ xii, 99 p. ]

Keywords

Deep-UV; Chemically amplified resist; Poly(1,4-dioxaspiro[4.4]nonane-2-methyl methacrylate; Dry etching resistance; 건식내에칭성; 원자외선; 화학증폭형 포토레지스트; 폴리(1,4-디옥사스피로[4.4]노난-2-메틸 메타크릴레이트)

URI
http://hdl.handle.net/10203/49770
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=156298&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
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