Alternating copolymers of sulfur dioxide and vinyltrimethylsilane (VTMS) and terpolymers with allyltrimethylsilane (ATMS) and 1-butene have been synthesized by low-temperature, free radical-initiated polymerization. The copolymers with VTMS were soluble but hydrolytically unstable. Whereas the copolymer from ATMS was insoluble, terpolymers containing less than 75 mol-% ATMS (relative to butene) were soluble in a variety of organic solvents. Moreover, they were stable against hydrolysis and had good film forming properties. Their electron beam sensitivity was 1. 5 mu C/cm**2 at 20 keV, and their contrast was approx. 2. The terpolymers have been used as a top imaging layer in a two-layer resist system to transfer half-micron features into a 1. 2 mu m-thick Novolac planarizing layer by oxygen reactive-ion etching.
|Title of host publication||Technical Papers, Regional Technical Conference - Society of Plastics Engineers|
|Place of Publication||Brookfield Center, CT, USA|
|Publisher||Soc of Plastics Engineers Inc|
|Number of pages||9|
|State||Published - Dec 1 1985|
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