PARTICLE DIAMETER EVALUATION METHOD OF METAL NANO INK, MANUFACTURING METHOD OF SUBSTRATE FOR PRINTED WIRING BOARD, AND METAL NANO INK

• Main Authors: OKADA KAZUMASA, SUGIURA MOTOHIKO, KAKUDO HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEASURING; NANOTECHNOLOGY; PERFORMING OPERATIONS; PHYSICS; PRINTED CIRCUITS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TESTING; TRANSPORTING

To provide a particle diameter evaluation method of metal nano ink capable of easily evaluating the particle diameter of a metal nano particle.SOLUTION: A particle diameter evaluation method of metal nano ink related to one aspect of the present invention is a method of evaluating the particle diameter of a metal nano particle contained in the metal nano ink that contains a solvent and metal nano particles dispersed in the solvent and is used for producing a sinter layer by coating and burning. This method includes the steps of: coating a smooth surface with the metal nano ink; drying the coated film of the metal nano ink; measuring the glossiness of the dried coated film at the incident angle 60°; and determining, as a nondefective, when the measured value of the glossiness of the coated film is within a prescribed range.SELECTED DRAWING: Figure 1 【課題】発明は、金属ナノ粒子の粒径を容易に評価することができる金属ナノインクの粒径評価方法を提供することを課題とする。【解決手段】本発明の一態様に係る金属ナノインクの粒径評価方法は、溶媒及びこの溶媒中に分散される金属ナノ粒子を含み、塗工及び焼成により焼結体層を形成するための金属ナノインクに含まれる金属ナノ粒子の粒径を評価する方法であって、金属ナノインクを平滑面上に塗工する工程と、上記金属ナノインクの塗膜を乾燥する工程と、乾燥した上記塗膜の入射角６０°での光沢度を測定する工程と、上記塗膜の光沢度の測定値が所定範囲内にあるものを良品と判定する工程とを備える。【選択図】図１