Photosensitive insulating paste and thick film multi-layer circuit substrate

• Main Authors: TOSE MAKOTO, KAWAKAMI HIROMICHI, WATANABE SHIZUHARU
• Format: Patent
• Language: English
• Published: 05.08.2003
• Edition: 7
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; BASIC ELECTRIC ELEMENTS; CABLES; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CINEMATOGRAPHY; CONDUCTORS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; HOLOGRAPHY; INSULATORS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MATERIALS THEREFOR; METALLURGY; MINERAL OR SLAG WOOL; ORIGINALS THEREFOR; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; PRINTED CIRCUITS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

A photosensitive insulating paste contains a borosilicate glass powder and a crystalline SiO2 powder, wherein the powders are dispersed in a photosensitive organic vehicle and the paste contains the crystalline SiO2 component in an amount of about 3-40 wt. % after sintering. A thick-film multi-layer circuit substrate (e.g., chip inductor) comprising an insulating substrate on which insulating layers are formed, wherein the insulating layers are formed through exposure, development and sintering, after the application of the photosensitive insulating paste.