Conductive paste and ceramic electronic component

Patent metadata

Field	Value
Publication number	US-9765225-B2
Application number	US-201615067736-A
Country	US
Kind code	B2
Filing date	Mar 11, 2016
Priority date	Sep 17, 2013
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A conductive paste obtained by adding an organic solvent B to a vehicle containing a Ni powder, a binder resin component, and an organic solvent A. The Ni powder has an average primary particle size of 30 to 400 nm. The binder resin component is cellulose acetate butyrate. Organic solvent A is a solvent having a Δ δ value of 11.5 or less with the cellulose acetate butyrate. Organic solvent B is a solvent having a Δ δ value from 11.5 to 25.0 with the cellulose acetate butyrate. A ratio of the organic solvent B relative to a total of the organic solvent A and the organic solvent B is 5.0 to 40.0 wt %.

First claim

The invention claimed is:

1. A conductive paste comprising:
(a) Ni powder having an average primary particle size of 30 to 400 nm;
(b) cellulose acetate butyrate;
(c) organic solvent A having a Δ δ value of 11.5 or less with the cellulose acetate butyrate; and
(d) organic solvent B different from organic solvent A having a Δ δ value from 11.5 to 25.0 with the cellulose acetate butyrate,
a ratio of the organic solvent B relative to a total of the organic solvent A and the organic solvent B is 5.0 to 40.0 wt %.

2. The conductive paste according to claim 1 , wherein the organic solvent A is selected from the group consisting of alcohols, ethers, esters, and ketones.

3. The conductive paste according to claim 2 , wherein the organic solvent A is at least one solvent selected from the group consisting of acetophenone, anisole, 2-ethylbutyl acetate, 2-ethylhexyl acetate, 2-hexyl acetate, n-propyl acetate, n-hexyl acetate, ethyl acetate, butyl acetate, diisobutyl ketone, dihydroterpineol, dihydroterpineol acetate, terpineol, terpineol acetate, triacetin, phenetole, butyl acetate, butyl butyrate, isopentyl propionate, hexyl acetate, heptyl acetate, benzyl acetate, benzyl alcohol, methyl n-amyl ketone, methyl isobutyl ketone, and methyl ethyl ketone.

4. The conductive paste according to claim 2 , wherein the organic solvent B is a hydrocarbon.

5. The conductive paste according to claim 4 , wherein the organic solvent B is at least one solvent selected from the group consisting of α-pinene, hexane, octane, dodecane, toluene, xylene, cyclohexane, methylcyclohexane, and D-limonene.

6. The conductive paste according to claim 1 , wherein the organic solvent B is a hydrocarbon.

7. The conductive paste according to claim 6 , wherein the organic solvent B is at least one solvent selected from the group consisting of α-pinene, hexane, octane, dodecane, toluene, xylene, cyclohexane, methylcyclohexane, and D-limonene.

8. The conductive paste according to claim 1 , further comprising a ceramic solid component, and the ceramic solid component has an ABO 3 perovskite structure, where A is at least one selected from the group consisting of Ba, Ca, and Sr, and B is at least one selected from Ti and Zr.

9. The conductive paste according to claim 1 , wherein the cellulose acetate butyrate is a polymer with a weight average molecular weight from 5000 to 650000.

10. A method of manufacturing a conductive paste, the method comprising:
providing a vehicle containing:
(a) Ni powder having an average primary particle size of 30 to 400 nm;
(b) cellulose acetate butyrate; and
(c) organic solvent A having a Δ δ value of 11.5 or less with the cellulose acetate butyrate; and

mixing an organic solvent B different from organic solvent A having a Δ δ value from 11.5 to 25.0 with the cellulose acetate butyrate with the vehicle such that a ratio of the organic solvent B relative to a total of the organic solvent A and the organic solvent B is 5.0 to 40.0 wt %.

11. The method of manufacturing a conductive paste according to claim 10 , wherein the organic solvent A is selected from the group consisting of alcohols, ethers, esters, and ketones.

12. The method of manufacturing a conductive paste according to claim 11 , wherein the organic solvent A is at least one solvent selected from the group consisting of acetophenone, anisole, 2-ethylbutyl acetate, 2-ethylhexyl acetate, 2-hexyl acetate, n-propyl acetate, n-hexyl acetate, ethyl acetate, butyl acetate, diisobutyl ketone, dihydroterpineol, dihydroterpineol acetate, terpineol, terpineol acetate, triacetin, phenetole, butyl acetate, butyl butyrate, isopentyl propionate, hexyl acetate, heptyl acetate, benzyl acetate, benzyl alcohol, methyl n-amyl ketone, methyl isobutyl ketone, and methyl ethyl ketone.

13. The method of manufacturing a conductive paste according to claim 11 , wherein the organic solvent B is a hydrocarbon.

14. The method of manufacturing a conductive paste according to claim 13 , wherein organic solvent B is at least one solvent selected from the group consisting of α-pinene, hexane, octane, dodecane, toluene, xylene, cyclohexane, methylcyclohexane, and D-limonene.

15. The method of manufacturing a conductive paste according to claim 10 , wherein organic solvent B is a hydrocarbon.

16. The method of manufacturing a conductive paste according to claim 15 , wherein organic solvent B is at least one solvent selected from the group consisting of α-pinene, hexane, octane, dodecane, toluene, xylene, cyclohexane, methylcyclohexane, and D-limonene.

17. The method of manufacturing a conductive paste according to claim 10 , wherein the vehicle further includes a ceramic solid component, and the ceramic solid component has an ABO 3 perovskite structure, where A is at least one selected from the group consisting of Ba, Ca, and Sr, and B is at least one selected from Ti and Zr.

18. The method of manufacturing a conductive paste according to claim 10 , wherein the cellulose acetate butyrate is a polymer with a weight average molecular weight from 5000 to 650000.

19. The method of manufacturing a conductive paste according to claim 10 , further comprising forming a conductor pattern on a ceramic green sheet using the conductive paste.

20. The method of manufacturing a conductive paste according to claim 19 , further comprising forming a ceramic electronic component from a plurality of the ceramic green sheets having the conductive paste thereon.

Assignees

• Murata Manufacturing Co

Inventors

• Ishikawa Masahito
• Ogata Naoaki

Classifications

• C08L1/14 Primary

  Mixed esters, e.g. cellulose acetate-butyrate · CPC title

• H01G4/0085

  Fried electrodes · CPC title

• H01G4/30

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• C09D5/24 Primary

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title