CONDUCTIVE PARTICLE, ANISOTROPIC CONDUCTIVE ADHESIVE, CONNECTION STRUCTURE AND PRODUCTION METHOD OF CONDUCTIVE PARTICLE

• Main Authors: MATSUZAWA MITSUHARU, MATSUZAKI TOSHIAKI, ENOMOTO NANA, NAKAGAWA MASAYUKI, EJIRI YOSHINORI, WATANABE YASUSHI, AKAI KUNIHIKO, YAMAMURA TAIZO
• Format: Patent
• Language: English; Japanese
• Published: 28.09.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; CURRENT COLLECTORS; ELECTRICITY; INSULATORS; LINE CONNECTORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

PROBLEM TO BE SOLVED: To provide a conductive particle capable of having low conductive resistance and high insulation reliability when being used as a conductive particle blended in an anisotropic conductive adhesive, and maintaining low electric resistance value even when being highly compressed, the anisotropic conductive adhesive and connection structure using the conductive particle, and a production method of the conductive particle.SOLUTION: The conductive particle comprises: a resin particle; and a metal layer disposed on a surface of the resin particle. The metal layer has a first layer including copper, or including nickel and copper and a second layer including nickel, in the order close to the resin particle and includes a grain including palladium whose length in a thickness direction of the metal layer is equal to or more than 4 nm, and an outer surface of the metal layer has projections. 【課題】異方導電性接着剤に配合される導電粒子として用いられたときに低い導通抵抗と高い絶縁信頼性とを両立することができ、且つ高圧縮された場合でも低い電気抵抗値を保つことができる導電粒子、該導電粒子を用いた異方導電性接着剤及び接続構造体、並びに導電粒子の製造方法を提供する。【解決手段】この導電粒子は、樹脂粒子と、該樹脂粒子の表面に設けられた金属層と、を備え、金属層は、樹脂粒子に近い順に、銅、又はニッケル及び銅を含む第１の層と、ニッケルを含む第２の層と、を有し、金属層の厚さ方向における長さが４ｎｍ以上であるパラジウムを含む粒を含有し、金属層の外表面には突起が形成されている。【選択図】図１