Fine silver particle dispersion
AssigneeDowa Electronics Materials Co., Ltd.
InventorsShingo Teragawa, Takashi Hinotsu, Dave Hui, Michael Stephen Wolfe, Howard David Glicksman, Haixin Yang
Life of this patent
Estimating the term…
Abstract
This disclosure relates to a fine silver particle dispersion comprising: (i) 60 to 95 wt. % of fine silver particles, wherein particle diameter (D50) of the fine silver particles is 50 to 300 nm, (ii) 4.5 to 39 wt. % of a solvent; and (iii) 0.1 to 3 wt. % of a resin, wherein the glass transition temperature (Tg) of the resin is 70 to 300° C., wherein the weight percentages are based on the weight of the fine silver particle dispersion.
Claims13
A fine silver particle dispersion comprising:
- (i) 60 to 95 wt. % of fine silver particles, wherein particle diameter (D50) of the fine silver particles after being dispersed in solvent is 50 to 300 nm, (ii) 4.5 to 39 wt. % of a solvent;
- and
- (iii) ethyl cellulose resin,
- wherein the total amount of ethyl cellulose resin in the dispersion is 0.1 to 0.9 wt. %, and includes an ethyl cellulose resin having a weight-average molecular weight in the range of from 23,000 to 180,000,
- the weight percentages are based on the weight of the fine silver particle dispersion,
- the fine silver particle dispersion comprises no glass frit, and
- the fine silver particle dispersion does not contain terpene and does not contain silver microparticles having an average primary particle diameter of 1μm or more.
A fine silver particle dispersion consisting of:
- (i) 60 to 95 wt. % of fine silver particles, wherein particle diameter (D50) of the fine silver particles after being dispersed in solvent is 50 to 300 nm, (ii) 4.5 to 39 wt. % of solvent selected from the group consisting of diethylene glycol monobutyl ether, diethylene glycol dibutyl ether, diethylene glycol monobutyl ether acetate;
- and
- (iii) ethyl cellulose resin,
- wherein the total amount of ethyl cellulose resin in the dispersion is 0.1 to 0.9 wt. %, and includes an ethyl cellulose resin having a weight-average molecular weight in the range of from 23,000 to 180,000,
- the weight percentages are based on the weight of the fine silver particle dispersion,
- the fine silver particle dispersion does not contain glass frit and does not contain silver microparticles having an average primary particle diameter of 1μm or more.
Dependencies are inferred from the claim text.