Fishing – trapping – and vermin destroying
Patent
1990-01-18
1991-05-07
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
437978, 148DIG137, H01L 21312
Patent
active
050136895
ABSTRACT:
A method of forming a passivation film for protection of circuits and/or curcuit elements on semiconductor chips, IC chips, LSI chips, VLSI chips or microcomputer, wherein the resist film used in patterning the passivation film is employed as part of the passivation film after being subjected to post-baking, and the upper layer of the passivation film is made of a material selected from the group consisting of a light-sensitive polyimide, silicon resin, epoxy resin and silicon ladder polymer.
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Electronics International, vol. 54, No. 12, 16th Jun. 1981, p. 73, New York, U.S.; J. Gosch: "Polymer Doubles as Photoresist and Insulator".
Fukushima Jiro
Yamamoto Isamu
Chaudhuri Olik
Griffis Andrew
Mitsubishi Denki & Kabushiki Kaisha
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