Hughes Aircraft Company

Hughes Electronics Corporation

Mcdonnell Douglas Corporation

Lydia H Simanyi

Steven R Felstein

Martin B Sheratte

Ching P Lo

Daniel A Huang

Richard Fanucchi

Joan L Lum

Gregory L Mayhew

Shih Chou

Rebecca Lee

Robert A Dunaetz

A chip-on-board electronic device includes an electronic device die affixed to a printed circuit board, and electrically interconnected thereto by wirebonds. The electronic device is protected by coating it with a layer of silicon oxynitride and, optionally, an overlying thin layer of a conformal coating such as parylene. Under some circumstances, a protective layer of an organic material may be used instead of the layer of silicon oxynitride. The chip-on-board electronic device may be protected with an overlying layer of the conformal coating.

Preparation of passivated chip-on-board electronic devices

Predetermined desired areas of solvent-insoluble parylene coatings are removed from substrates made of materials such as plastics, metals, composites, or ceramics by contacting the areas to be removed with a substance that causes the parylene coating to loosen from the substrate sufficiently to permit physical removal, as by peeling or scraping. The substance used is tetrahydrofuran alone, or in combination with a carrier that does not react with the tetrahydrofuran, the parylene, or the substrate, and that makes the mixture sufficiently viscous for application to desired coating areas without affecting other areas contiguous thereto.

Methods for removing parylene coatings from predetermined, desired areas

Production of urethane foams of increased fire resistance by mixing an ethylenic, e.g. allyl or vinyl, phosphorus compound with a polyol and polymerizing the polyol with polyisocyanate while simultaneously polymerizing the ethylenic phosphorus compound with a suitable catalyst to form an interpenetrating network of urethane polymer and phosphorus-containing polymer.

Fire-retardant polyurethane foams

Growing community of inventors

Santa Ana, CA, United States of America

Lydia H Simanyi