Intermediate thermal expansion coefficient glass

Patent metadata

Field	Value
Publication number	US-2016145146-A1
Application number	US-201615013417-A
Country	US
Kind code	A1
Filing date	Feb 2, 2016
Priority date	Oct 6, 2008
Publication date	May 26, 2016
Grant date	—

Abstract

CTE-matched silicate glasses and more particularly to low-alkali CTE-matched silicate glasses that are useful in semiconductor-based applications, such as photovoltaics are described along with methods of making such glasses.

First claim

1 . A glass comprising about, in mol %:
60 to 65 percent SiO 2 ; 8 to 12 percent Al 2 O 3 ; 7 to 15 percent B 2 O 3 ; 0 to 8 percent M 2 O; and 9 to 15 percent RO;
wherein, M is an alkali metal and wherein, R is an alkaline earth metal, and the glass has a coefficient of thermal expansion of from about 4.0 to about 7.5 ppm/° C. from 25 to 300° C.

2 . The glass according to claim 1 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.5 ppm/° C. from 25 to 300° C.

3 . The glass according to claim 2 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.0 ppm/° C. from 25 to 300° C.

4 . The glass according to claim 1 , comprising about 0.1 to 8 mol % M 2 O.

5 . The glass according to claim 1 , comprising about, in mol %:
61 to 64 percent SiO 2 ; 8 to 12 percent Al 2 O 3 ; 9 to 15 percent B 2 O 3 ; greater than 0 to 4 percent M 2 O; and 12 to 15 percent RO.

6 . The glass according to claim 1 , comprising about, in mol %:
60 to 65 percent SiO 2 ; 8 to less than 10 percent Al 2 O 3 ; greater than 11 to 15 percent B 2 O 3 ; greater than 0 to less than 1 percent M 2 O; and 9 to 15 percent RO.

7 . The glass according to claim 1 , comprising about, in mol %:
60 to 65 percent SiO 2 ; 10 to 12 percent Al 2 O 3 ; 7 to 11 percent B 2 O 3 ; 1 to 8 percent M 2 O; and 9 to 15 percent RO.

8 . The glass according to claim 1 , further comprising about 0.01 to 0.4 mol % SnO 2 .

9 . The glass according to claim 1 , comprising about, in mol %:
62 to 65 percent SiO 2 ; 10 to 12 percent Al 2 O 3 ; 7 to 11 percent B 2 O 3 ; 3 to 8 percent MgO; 3 to 10 percent CaO; 3 to 8 percent SrO; and 1 to 8 percent M 2 O;
wherein, M is an alkali metal selected from K, Na, and combinations thereof and wherein, CaO/(CaO+SrO) is from 0.4 and 1.

10 . A glass comprising about, in mol %:
20 to 70 percent SiO 2 ; 5 to 20 percent Al 2 O 3 ; 0 to 15 percent B 2 O 3 ; 0 to 1 percent M 2 O; 0 to 10 percent MgO; 8 to 35 percent CaO; 0 to 16 percent SrO; 0 to 9 percent BaO; and 20 to 45 percent RO;
wherein, M is an alkali metal and wherein, R is an alkaline earth metal, and the glass has a coefficient of thermal expansion of from about 4.0 to about 7.5 ppm/° C. from 25 to 300° C.

11 . The glass according to claim 10 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.5 ppm/° C. from 25 to 300° C.

12 . The glass according to claim 11 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.0 ppm/° C. from 25 to 300° C.

13 . The glass according to claim 12 , comprising about, in mol %:
57 to 68 percent SiO 2 ; 5 to 12 percent Al 2 O 3 ; 0 to 8 percent B 2 O 3 ; 0 to 0.1 percent M 2 O; 0 to 10 percent MgO; 8 to 28 percent CaO; 0 to 10 percent SrO; 0 to 9 percent BaO; and 21 to 32 percent RO;
wherein, M is an alkali metal and wherein, R is an alkaline earth metal, and the glass has a coefficient of thermal expansion of from about 4.0 to about 6.0 ppm/° C. from 25 to 300° C.

14 . A glass comprising about, in mol %:
60 to 68 percent SiO 2 ; 8 to 11 percent Al 2 O 3 ; 6 to 11 percent B 2 O 3 ; 0 to 1 percent M 2 O; 0 to 5 percent MgO; greater than 0 to 12 percent CaO; 1 to 12 percent SrO; 0 to 8 percent BaO; and 16 to 20 percent RO;
wherein R is an alkaline earth metal, and M is an alkali metal, and the glass has a coefficient of thermal expansion of from about 4.0 to about 7.5 ppm/° C. from 25 to 300° C.

15 . The glass according to claim 14 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.5 ppm/° C. from 25 to 300° C.

16 . The glass according to claim 15 , wherein the glass has a coefficient of thermal expansion of from about 4.5 to about 6.0 ppm/° C. from 25 to 300° C.

17 - 30 . (canceled)

Assignees

• Corning Inc

Inventors

• Aitken Bruce Gardiner
• Kosik Williams Carlo Anthony

Classifications

• H10F99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• C03C3/083

  containing aluminium oxide or an iron compound · CPC title

• C03C3/091 Primary

  containing aluminium · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title