Composition for ceramic substrates and ceramic circuit component

Patent metadata

Field	Value
Publication number	US-9607765-B2
Application number	US-201514953976-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Jun 5, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A composition for ceramic substrates that includes a mixture of borosilicate glass powder and ceramic powder. The borosilicate glass powder contains 4% to 8% by weight B 2 O 3 , 38% to 44% by weight SiO 2 , 3% to 10% by weight Al 2 O 3 , and 40% to 48% by weight MO, where MO is at least one selected from CaO, MgO, and BaO. The mixing proportions of the borosilicate glass powder and the ceramic powder are 50% to 56% by weight the borosilicate glass powder and 50% to 44% by weight the ceramic powder. The ceramic powder has an average particle diameter D50 of 0.4 to 1.5 μm.

First claim

The invention claimed is:

1. A composition for ceramic substrates, the composition comprising:
a mixture of 50% to 56% by weight of borosilicate glass powder and 50% to 44% by weight of ceramic powder,
wherein the borosilicate glass powder contains:
4% to 8% by weight B 2 O 3 ,
38% to 44% by weight SiO 2 ,
3% to 10% by weight Al 2 O 3 , and
40% to 48% by weight MO, where MO is at least one selected from CaO, MgO, and BaO, and
wherein the ceramic powder has an average particle diameter D50 of 0.4 to 1.5 μm. and the ceramic powder is alumina powder.

2. The composition according to claim 1 , further comprising a crystallinity modifier.

3. The composition according to claim 2 , wherein the crystallinity modifier is crystallized wollastonite.

4. The composition according to claim 3 , wherein a quantity of the crystallized wollastonite is in a range of 0.005 to 0.1 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

5. The composition according to claim 3 , wherein a quantity of the crystallized wollastonite is in a range of 0.005 to 0.04 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

6. The composition according to claim 2 , wherein the crystallinity modifier is crystallized anorthite.

7. The composition according to claim 6 , wherein a quantity of the crystallized anorthite is in a range of 0.03 to 0.2 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

8. The composition according to claim 6 , wherein a quantity of the crystallized anorthite is in a range of 0.05 to 0.15 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

9. A ceramic circuit component comprising:
a ceramic substrate obtained through shaping and firing of a composition according to claim 1 ; and
a conductor section adjacent to the ceramic substrate.

10. A ceramic circuit component comprising:
a ceramic substrate comprising a composition according to claim 1 ; and
a conductor section adjacent to the ceramic substrate,
wherein the ceramic substrate and the conductor section are obtained by co-firing.

11. A composition for ceramic substrates, the composition comprising:
a mixture of 50% to 56% by weight of borosilicate glass powder and 50% to 44% by weight of ceramic powder; and
crystallized wollastonite,
wherein the borosilicate glass powder contains:
4% to 8% by weight B 2 O 3 ,
38% to 44% by weight SiO 2 ,
3% to 10% by weight Al 2 O 3 , and
40% to 48% by weight MO, where MO is at least one selected from CaO, MgO, and BaO, and
wherein the ceramic powder has an average particle diameter D50 of 0.4 to 1.5 μm.

12. The composition according to claim 11 , wherein a quantity of the crystallized wollastonite is in a range of 0.005 to 0.1 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

13. The composition according to claim 11 , wherein a quantity of the crystallized wollastonite is in a range of 0.005 to 0.04 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

14. A ceramic circuit component comprising:
a ceramic substrate obtained through shaping and firing of a composition according to claim 11 ; and
a conductor section adjacent to the ceramic substrate.

15. A ceramic circuit component comprising:
a ceramic substrate comprising a composition according to claim 11 ; and
a conductor section adjacent to the ceramic substrate,
wherein the ceramic substrate and the conductor section are obtained by co-firing.

16. A composition for ceramic substrates, the composition comprising:
a mixture of 50% to 56% by weight of borosilicate glass powder and 50% to 44% by weight of ceramic powder; and
crystallized anorthite,
wherein the borosilicate glass powder contains:
4% to 8% by weight B 2 O 3 ,
38% to 44% by weight SiO 2 ,
3% to 10% by weight Al 2 O 3 , and
40% to 48% by weight MO, where MO is at least one selected from CaO, MgO, and BaO, and
wherein the ceramic powder has an average particle diameter D50 of 0.4 to 1.5 μm.

17. The composition according to claim 16 , wherein a quantity of the crystallized anorthite is in a range of 0.03 to 0.2 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

18. The composition according to claim 16 , wherein a quantity of the crystallized anorthite is in a range of 0.05 to 0.15 parts by weight when a total quantity of the borosilicate glass powder and the ceramic powder is 100 parts by weight.

19. A ceramic circuit component comprising:
a ceramic substrate obtained through shaping and firing of a composition according to claim 16 ; and
a conductor section adjacent to the ceramic substrate.

20. A ceramic circuit component comprising:
a ceramic substrate comprising a composition according to claim 16 ; and
a conductor section adjacent to the ceramic substrate,
wherein the ceramic substrate and the conductor section are obtained by co-firing.

Assignees

• Murata Manufacturing Co

Inventors

• Kishida Kazuo
• Fujita Seiji
• Iida Yuichi

Classifications

• H05K3/4629

  laminating inorganic sheets comprising printed circuits, e.g. green ceramic sheets · CPC title

• H01G4/30

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

• C03C3/064

  containing boron · CPC title

• H01G4/1209 Primary

  characterised by the ceramic dielectric material (H01G4/1272, H01G4/1281 take precedence) · CPC title

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title