Title:
FINE SILVER PARTICLES, METHOD FOR PRODUCING SAME, CONDUCTIVE PASTE CONTAINING THE FINE SILVER PARTICLES, CONDUCTIVE FILM, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/040521
Kind Code:
A1
Abstract:
Disclosed are fine silver particles having an average particle diameter (DSEM) of 30-100 nm and a polycrystallization degree (which is the ratio of the average particle diameter (DSEM) to the crystallite diameter (DX), namely (DSEM)/(DX)) of not less than 2.8. The fine silver particles are able to be obtained by the following procedure: an alcohol solution of an amine complex of silver nitrate prepared using silver nitrate and one or more kinds of amines that are water-soluble or water-soluble to some extent and have a boiling point of not more than 200˚C is added into a water-alcohol mixed solvent, into which ascorbic acid or erythorbic acid is dissolved, for reducing and depositing fine silver particles, and the thus-obtained fine silver particles are separated, cleaned, and then vacuum dried or vacuum freeze dried at a temperature of not more than 30˚C. The thus-obtained fine silver particles are polycrystallized fine silver particles that have an average particle diameter of 30-100 nm and are suitable as a starting material for a conductive paste that can be fired at low temperatures.
Inventors:
KAKIHARA, Yasuo (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
柿原康男 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
OHSUGI, Mineko (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
大杉峰子 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
柿原康男 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
OHSUGI, Mineko (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
大杉峰子 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
Application Number:
JP2010/067075
Publication Date:
April 07, 2011
Filing Date:
September 30, 2010
Export Citation:
Assignee:
TODA KOGYO CORPORATION (1-4 Meijishinkai, Otake-shi Hiroshima, 52, 〒7390652, JP)
戸田工業株式会社 (〒52 広島県大竹市明治新開１番４ Hiroshima, 〒7390652, JP)
KAKIHARA, Yasuo (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
柿原康男 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
OHSUGI, Mineko (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
戸田工業株式会社 (〒52 広島県大竹市明治新開１番４ Hiroshima, 〒7390652, JP)
KAKIHARA, Yasuo (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
柿原康男 (〒52 広島県大竹市明治新開１番４戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
OHSUGI, Mineko (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
International Classes:
B22F1/00; B22F9/24; H01B1/22; H01B5/00; H01B13/00
Attorney, Agent or Firm:
OKADA, Kazuhiko (Okada & Associates, 6F Kudan Kangyo Bldg., 10-1, Kudankita 1-chome, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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