公开(公告)号：US11798707B2

公开(公告)日：2023-10-24

申请号：US16961612

申请日：2019-01-10

Applicant: NISSHIN ENGINEERING INC.

Inventor： Shu Watanabe ,  Shiori Sueyasu ,  Keitaroh Nakamura

IPC: H01B1/02 ,  B22F3/02 ,  B22F1/054 ,  B22F1/142 ,  B22F1/102 ,  B22F9/12

CPC classification number: H01B1/02 ,  B22F1/054 ,  B22F1/102 ,  B22F1/142 ,  B22F3/02 ,  B22F9/12 ,  B22F2301/10 ,  B22F2304/054 ,  B22F2999/00 ,  B22F1/142 ,  B22F2201/02

Abstract: Provided are copper microparticles which have exceptional oxidation resistance, in which oxidation is reduced even when the copper microparticles are held at a firing temperature in an oxygen-containing atmosphere, and in which sintering also occurs. The copper microparticles have a particle diameter of 10-100 nm, have a surface coating material, and are such that, after the copper microparticles are held for one hour at a temperature of 400° C. in an oxygen-containing atmosphere, the particle diameter exceeds 100 nm while a copper state is retained.

公开(公告)号：US11691200B2

公开(公告)日：2023-07-04

申请号：US16963796

申请日：2019-01-10

Applicant: NISSHIN ENGINEERING INC.

Inventor： Shu Watanabe ,  Shiori Sueyasu ,  Keitaroh Nakamura

IPC: B22F9/12

CPC classification number: B22F9/12 ,  B22F2301/255 ,  B22F2304/054

Abstract: Provided are: a production method for silver fine particles that retain capabilities such as conductivity and make it possible to form wiring at even lower temperatures; and silver fine particles. A silver fine particle production method in which silver powder is used to produce silver fine particles by means of a gas phase method. The silver fine particle production method has a step for supplying an organic acid to the silver fine particles. The gas phase method is, for example, a plasma method or a flame method. The silver fine particles have a surface coating that includes at least a carboxyl group.

公开(公告)号：US10144060B2

公开(公告)日：2018-12-04

申请号：US15527947

申请日：2015-11-20

Applicant: NISSHIN ENGINEERING INC.

Inventor： Shu Watanabe ,  Keitaroh Nakamura ,  Shiori Sueyasu

IPC: B22F1/00 ,  B22F1/02 ,  B22F9/02 ,  B22F9/08

Abstract: In the present invention, a fine silver particle has a particle diameter of 65-80 nm and has, on the surface of the particle, a thin film comprising a hydrocarbon compound. The fine silver particle has an exothermic peal temperature of 140-155° C. in differential thermal analysis. If d denotes the particle diameter after firing at a temperature of 100° C. for one hour and D denotes the particle diameter before firing, it is preferable for the fine silver particle to have a particle growth rate, as represented by (d−D)/D (%), of 50% or higher.