RESINOUS INSULATION SUBSTRATE FOR WIRING CIRCUIT BOARD AND ITS MANUFACTURE

PURPOSE:To obtain insulation substrates with excellent heat conductivity in the direction of their thickness, by orientating a semicrystalline copolymer to form a sheet and laminating these sheets so that their orientation direction is identical with the thickness direction of the substrate. CONSTIT...

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Bibliographische Detailangaben
1. Verfasser:	NEZU SHINJI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CONDUCTORS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INSULATORS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS PRINTED CIRCUITS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SEMICONDUCTOR DEVICES TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain insulation substrates with excellent heat conductivity in the direction of their thickness, by orientating a semicrystalline copolymer to form a sheet and laminating these sheets so that their orientation direction is identical with the thickness direction of the substrate. CONSTITUTION:Desirable resin is formed into an isotropic sheet 10 of a desired thickness by compression molding, and then it is cooled and further auxiliarily heated up to an orientation temperature. An orientated sheet 20 is obtained by performing roll extension of the isotropic sheet 10 at a temperature which is smaller than that on a dissolution transition point of a crystalline material against resin for use. These sheets are cut in rectangular shapes, laminated, and uniformalized in their direction by supersonic welding or the like. This laminate is cut in the direction in which the sheets 20 are orientated, and insulated substrates 30 are formed so that each of them has a width l corresponding to a desired thickness l and besides is provided with a surface 30a, a rear 30b, and a thickness l in order to mount an electric device thereon. Substrates with excellent heat conductivity can be obtained accordingly in the direction of their thickness.