METAL FINE PARTICLE DISPERSION, CONDUCTIVE INK, AND ELECTRONIC DEVICE

• Main Authors: YAMAGUCHI RYOTA, MIYAWAKI ATSUHISA, KARINO YUSUKE, OZAWA TORU, KAWAMURA KAORI, YATSUGI KENICHI
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2018
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CABLES; 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; ELECTRICITY; FILLING PASTES; INKS; INSULATORS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PREPARATION OF CARBON BLACK; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SEMICONDUCTOR DEVICES; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a metal fine particle dispersion or a metal fine particle dispersion-containing ink exhibiting sufficient conductivity and transistor characteristics at a firing temperature of approximately 120°C, and to provide a metal fine particle dispersion or a metal fine particle dispersion-containing ink having long-term storage stability and dispersion stability at 23°C.SOLUTION: A metal fine particle dispersion is extremely stably dispersible in a polar solvent or a low polar solvent without using a high molecular weight dispersant by using a primary amine compound having an amino group and at least one hetero element and a monobasic carboxylic acid having a carboxyl group and at least one hetero element as protective agents. The metal fine particle dispersion can obtain an electrode which exhibits excellent conductivity in baking at a low temperature of approximately 120°C, and exhibits excellent transistor characteristics. Furthermore, said particle dispersion exhibits the above described characteristics, and has particularly excellent dispersion stability under room temperature as well.SELECTED DRAWING: Figure 1 【課題】１２０℃程度の焼成温度で十分な導電性及びトランジスタ特性を発現する金属微粒子分散体又は該金属微粒子分散体含有インク、及び、２３℃での長期保存安定性・分散安定性を有する金属微粒子分散体又は該金属微粒子分散体含有インクを提供する。【解決手段】 アミノ基および少なくとも一種のヘテロ元素を有する第一級アミン化合物と、カルボキシル基および少なくとも一種のヘテロ元素を有する一塩基カルボン酸を保護剤として用いることにより、高分子量の分散剤を使用することなく、極性溶媒又は低極性溶媒に極めて安定的に分散可能な金属微粒子分散体の発明を完成するに至った。本発明に係る金属微粒子分散体は、１２０℃程度の低温での焼結で優れた導電性を示すとともに、優れたトランジスタ特性を示す電極を得ることができる。また、当該微粒子分散体は、上記特性を示すことに加え、室温下で特に優れた分散安定性を有する。【選択図】図１