CONDUCTIVE VIA FILL INKS FOR CERAMIC MULTILAYER CIRCUIT BOARDS ON SUPPORT SUBSTRATES

Conductive via fill inks for green tapes to be stacked and bonded to a suppo rt substrate, the glass used for the green tape having a firing temperature from 850-950 .degree. C, wherein the glass used for the v ia fill ink has a glass transition temperature that is higher than that of the glass used...

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Bibliographische Detailangaben
Hauptverfasser:	THALER, BARRY JAY, TORMEY, ELLEN SCHWARTZ, PRABHU, ASHOK NARAYAN, KUMAR, ANANDA HOSAKERE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CABLES CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CONDUCTORS CORRECTING FLUIDS DYES ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FILLING PASTES INKS INSULATORS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTED CIRCUITS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SEMICONDUCTOR DEVICES TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	Conductive via fill inks for green tapes to be stacked and bonded to a suppo rt substrate, the glass used for the green tape having a firing temperature from 850-950 .degree. C, wherein the glass used for the v ia fill ink has a glass transition temperature that is higher than that of the glass used to make the green tape, preferably does not crystallize at th e maximum firing temperature of the green tape and comprises from 30-75 percent by volume of the glass-conductive metal powder mixture of the via fill ink. These conductive via fill inks will not shrink until the green tape shrinkage has commenced during firing of the composite circuit board and they will flow slightly during firing, forming good bonds to the glass in the walls of the vias, thereby ensuring good integrity of the vias and good connections to the circuitry on the fired ceramic multilayer circuit board.