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US 4,900,614 AGranted
Glass fiber base material for print wiring substrate
AssigneeNitto Boseki Co., Ltd.
InventorsKeita Miyazato, Kouichi Yamaki
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Abstract
A glass fiber base material for print wiring substrate is disclosed, comprising a fluorescent whitening agent attached to the surface of a sheet made of glass fibers such as woven fabrics, non-woven fabrics and paper. The glass fiber base material has excellent ultraviolet light-shielding properties and, hence, is very useful in production of super LSI.
Claims6
A glass fiber base material suitable for forming a print wiring substrate, wherein said base material comprises a glass fiber sheet which has been impregnated with an aqueous solution of a fluorescent whitening agent and then dried.
Dependencies are inferred from the claim text.