Back to results
US 5,326,390 AGranted
Organic vehicle and electronic paste
AssigneeE. I. Du Pont de Nemours and Company
InventorBerhan Tecle
Life of this patent
Estimating the term…
Abstract
An organic vehicle for electronic paste compositions is provided. The organic vehicle contains organo-soluble hydroxyalkyl substituted polysaccharide, a solvent for the polysaccharide, two hydrogen bonding components and inorganic oxide particulates having a surface area of at least 50 m.sup.2 /g.
Claims7
A high resolution, no-clean, screen printable vehicle suitable for an electronic paste composition comprising:
- (a) an organo-soluble hydroxy alkyl substituted polysaccharide;
- (b) a solvent for the polysaccharides;
- (c) a monofunctional hydrogen bonding component selected from the group consisting of:
- (i) alcohol having 1-4 carbon atoms,
- (ii) acid having 1-4 carbon atoms, and
- (iii) amine having a structure:
- ##STR6## wherein R.sub.1, R.sub.2 and R.sub.3 are independently H or alkyl of 1-4 carbon atoms, wherein the sum of R.sub.1 +R.sub.2 +R.sub.3 is not more than 4 carbon atoms,
- (d) a monofunctional hydrogen bonding component selected from the group consisting of:
- (i) alcohol having at least 5 carbon atoms,
- (ii) acid having at least 5 carbon atoms, and
- (iii) amine having the general structure:
- ##STR7## wherein R.sub.1, R.sub.2 and R.sub.3 are independently hydrogen or alkyl, and wherein the sum of R.sub.1 +R.sub.2 +R.sub.3 is at least 5 carbon atoms,
- (e) an inorganic oxide particulate material having a surface area of at least 50 m.sup.2 /g.
10 more elements
An electronic paste composition comprising:
- finely divided inorganic particles suspended in a high resolution, non-clean, screen printable vehicle comprising:
- (a) an organo-soluble hydroxy alkyl substituted polysaccharide,
- (b) a solvent for the polysaccharide,
- (c) a monofunctional hydrogen bonding component selected from the group consisting of:
- (i) alcohol having 1-4 carbon atoms,
- (ii) acid having 1-4 carbon atoms, and
- (iii) amine having the general structure:
- ##STR8## wherein R.sub.1, R.sub.2 and R.sub.3 are independently H or alkyl of 1-4 carbon atoms, wherein the sum of R.sub.1 +R.sub.2 +R.sub.3 is not more than 4 carbon atoms,
- (d) a monofunctional hydrogen bonding component selected from the group consisting of:
- (i) alcohol having at least 5 carbon atoms,
- (ii) acid having at least 5 carbon and
- (iii) amine having the general structure:
- ##STR9## wherein R.sub.1, R.sub.2 and R.sub.3 are independently are hydrogen or alkyl groups, and wherein the sum of R.sub.1 +R.sub.2 +R.sub.3 is at least 5 carbon atoms,
- (e) an inorganic oxide particulate material having a surface area of at least 50 m.sup.2 /g,
- (f) inorganic particles having a size smaller than 149 microns but greater than 1 micron.
12 more elements
Dependencies are inferred from the claim text.