Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1990-12-03
1992-06-30
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 34, C08G 7700
Patent
active
051264196
ABSTRACT:
A polymer having linear --Si--O--Si-- bonds and --Si--Si--Si-- bonds, or polysilane bonds more than trisilane bonds, sensitive to far ultraviolet rays. The light-sensitive polymer can be prepared by copolymerizing a dichlorodisiloxane and a dichlorosilane in an inert solvent in the presence of sodium. The polymer undergoes oxidation with oxygen plasma to form SiO.sub.2 resistant to oxygen dry etching, exhibits absorption peaks only in far ultraviolet and is suitable for preparing a single layered resist or an upper resist of a two layered resist system.
REFERENCES:
patent: 4384100 (1983-05-01), Takamizawa et al.
patent: 4626583 (1986-12-01), Arkles
patent: 4761464 (1988-08-01), Zeigler
Endou Masayuki
Ishihara Toshinobu
Kubota Tohru
Ogawa Kazufumi
Tanaka Yasuhisa
Marquis Melvyn I.
Matsushita Electric - Industrial Co., Ltd.
Shin-Etsu Chemical Co. , Ltd.
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