PRINTING INK, METAL NANOPARTICLES USED IN THE SAME, WIRING, CIRCUIT BOARD, AND SEMICONDUCTOR PACKAGE

• Main Authors: YOKOSAWA SHUNYA, INADA MAKI, KUMASHIRO YASUSHI, KURODA KYOKO, NAKAKO HIDEO, MASUDA KATSUYUKI, YAMAMOTO KAZUNORI, EJIRI YOSHINORI
• Format: Patent
• Language: English; Korean
• Published: 23.08.2012
• Subjects: 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; COLOUR PRINTING; CONDUCTORS; CORRECTING FLUIDS; DYES; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FILLING PASTES; INKS; INSULATORS; LINING MACHINES; 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; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

Disclosed is a printing ink comprising Cu- and/or CuO-containing metal nanoparticles, which obtains excellent dispersion properties and successive dispersion stability without using additives such as dispersing agents. Specifically disclosed is a printing ink that comprises Cu- and/or CuO-containing metal nanoparticles and has no more than 2,600 ppm of ionic impurities in the total solid content. The printing ink is obtained by dispersing the Cu- and/or CuO-containing metal nanoparticles, which have no more than 2,600 ppm of ionic impurities in the total solid content, in a dispersion medium.