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US5108961A
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Etchable core glass compositions and method for manufacturing a high performance microchannel plate
Assignee: Circon Corp
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Filing: 1991-05-10
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Granted: 1992-04-28
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Expires: 2011-05-10
Abstract
Abstract An etchable core glass composition consisting essentially of the following components present in the glass in the following mole percent ranges is shown: CHART I ______________________________________ CHEMICAL COMPOSITION RANGES mole percent ______________________________________ SiO 2 35-46 B 2 O 3 22-28 BaO + SrO + CaO + ZnO 20-32 Al 2 O 3 + Y 2 O 3 0-3.5 La 2 O 3 + Nd 2 O 3 + Sm 2 O 3 + CeO 2 1-11 As 2 O 3 + Sb 2 O 3 0-1.5 ______________________________________ A core glass for manufacturing a microchannel plate made from a glass composition having components in the glass range as defined above is also shown. The core glass has a transformation temperature in range of about 637° C. to about 654° C., a liquidus temperature below 1000° C. and wherein the composition consists essentially of the components described herein above and wherein the glass has an average lineal coefficient of thermal expansion in the range of about 74×10 -7 per °C. to about 91×10 -7 per °C. at a temperature between 25° C. and 300° C. is shown.
Inventors
- 👤 William J. S. Zhong
- 👤 John A. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:08
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/246; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/068; C03C3/076; C03C3/095; C03C3/102; C03C3/108; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
A glass composition comprising the following components present in the glass in the following mole percent ranges: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________
Claim 2
Dependent Claim
55 words
A glass composition comprising the following components present in the glass in the following mole percent ranges: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________
Claim 3
Dependent Claim
21 words
The glass composition of claim 1 further containing CaO which is present inn the glass in mole percent of about 6.5-7.3.
Claim 4
Dependent Claim
20 words
The glass composition of claim 1 further containing SrO which is present in the glass in mole percent of 10.2.
Claim 5
Dependent Claim
21 words
The glass composition of claim 1 further containing ZnO which is present in the glass in mole percent of about 2.6.
Claim 6
Dependent Claim
90 words
A microchannel plate made comprising substantially parallel surfaces wherein a plurality of glass fibers are fused together and the cores thereof are etched and extend between said parallel surfaces, said glass fibers being made from a core glass composition comprising the following components in the glass in the following mole percent ranges: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________
Claim 7
Dependent Claim
90 words
A microchannel plate made comprising substantially parallel surfaces wherein a plurality of glass fibers are fused together and the cores thereof are etched and extend between said parallel surfaces, said glass fibers being made from a core glass composition comprising the following components in the glass in the following mole percent ranges: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________
Claim 8
Dependent Claim
24 words
The microchannel plate of claim 5 wherein the glass composition further contains CaO which is present in glass in mole percent of about 6.5-7.3.
Claim 9
Dependent Claim
24 words
The microchannel plate of claim 5 wherein the glass composition further contains SrO which is present in the glass in mole percent of 0-3.
Claim 10
Dependent Claim
25 words
The microchannel plate of claim 5 wherein the glass composition further contains ZnO which is present in the glass in mole percent of about 2.6.
Claim 11
Dependent Claim
158 words
A cylindrically shaped, non-porous glass rod comprising a solid central area, said glass rod being formed of a glass composition having a transformation temperature in the range of about 637° C. to about 654° C. and a liquidus temperature below 1000° C., said glass having a composition comprising the following components, present in the glass, in the following mole percent: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________ wherein the total mole percent of SiO 2 +B 2 O 3 +BaO is in the range of about 76 to about 96 and wherein said glass rod has an average lineal coefficient of thermal expansion in the range of about 74×10 -7 per °C. to about 91×10 -7 per °C. at a temperature between 25° C. and 300° C.
Claim 12
Dependent Claim
158 words
A cylindrically shaped, non-porous glass rod comprising a solid central area, said glass rod being formed of a glass composition having a transformation temperature in the range of about 637° C. to about 654° C. and a liquidus temperature below 1000° C., said glass having a composition comprising the following components, present in the glass, in the following mole percent: ______________________________________
SiO.sub.2 35-46
B.sub.2 O.sub.3 22-28
BaO + SrO + CaO + ZnO 20-32
Al.sub.2 O.sub.3 + Y.sub.2 O.sub.3
0-3.5
La.sub.2 O.sub.3 + Nd.sub.2 O.sub.3 + Sm.sub.2 O.sub.3 + CeO.sub.2
1-11
As.sub.2 O.sub.3 + Sb.sub.2 O.sub.3
0-1.5
______________________________________ wherein the total mole percent of SiO 2 +B 2 O 3 +BaO is in the range of about 76 to about 96 and wherein said glass rod has an average lineal coefficient of thermal expansion in the range of about 74×10 -7 per °C. to about 91×10 -7 per °C. at a temperature between 25° C. and 300° C.
Claim 13
Dependent Claim
28 words
The cylindrically shaped non-porous glass rod of claim 9 wherein said glass composition further contains CaO which is present in the glass in mole percent of about 6.5-7.3.
Claim 14
Dependent Claim
28 words
The cylindrically shaped non-porous glass rod of claim 9 wherein said glass composition further contains SrO which is present in the glass in mole percent of about 10.2.
Claim 15
Dependent Claim
28 words
The cylindrically shaped non-porous glass rod of claim 9 wherein said glass composition further contains ZnO which is present in the glass in mole percent of about 2.6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |