Durable tungsten-doped tin-fluorophosphate glasses
First Claim
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1. A homogeneous glass comprising:
- Sn (55-75 wt %)P (4-14 wt %)O (6-24 wt %)F (4-22 wt %)W (0.5-15 wt %) and having a glass transition temperature Tg<
160°
C.
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Abstract
Tungsten-doped tin-fluorophosphate glasses are described herein which exhibit excellent humidity resistance, thermal resistance, and have a low glass transition temperature which makes them suitable for low temperature sealing applications, such as for encapsulating electronic components. In one embodiment, these glasses comprise 55-75% Sn, 4-14% P, 6-24% O, 4-22% F, and 0.15-15% W on a weight percent elemental basis.
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Citations
20 Claims
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1. A homogeneous glass comprising:
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Sn (55-75 wt %) P (4-14 wt %) O (6-24 wt %) F (4-22 wt %) W (0.5-15 wt %) and having a glass transition temperature Tg<
160°
C. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An encapsulated article, comprising:
a device encapsulated in a homogenous glass including, in weight percent on an elemental basis, 55-75% Sn, 4-14% P, 6-24% O, 4-22% F, and 0.15-15% W, said homogenous glass having a glass transition temperature Tg<
160°
C.- View Dependent Claims (8, 9)
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10. A method for encapsulating a device, said method comprising the steps of:
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depositing a homogeneous glass over at least a portion of said device; and heat treating said homogeneous glass that was deposited over said at least a portion of said device, wherein said homogeneous glass has a glass transition temperature Tg<
160°
C. and has a composition;Sn (55-75 wt %) P (4-14 wt %) O (6-24 wt %) F (4-22 wt %) W (0.5-15 wt %). - View Dependent Claims (11, 12, 13, 14)
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15. A package comprising:
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a plate; and a sealing glass plate which includes a swelled portion that is a hermetic seal which connects said plate to said sealing glass plate and also creates a gap between said plate and said sealing glass plate, wherein said sealing glass plate has a glass transition temperature Tg<
160°
C. and has a composition;Sn (55-75 wt %) P (4-14 wt %) O (6-24 wt %) F (4-22 wt %) W (0.5-15 wt %). - View Dependent Claims (16, 17)
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18. A package comprising:
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a first plate; a second plate; and a frit made from a homogeneous glass, wherein said frit was heated in a manner that caused said frit to melt and form a hermetic seal which connects said first plate to said second plate, wherein said homogeneous glass has a glass transition temperature Tg<
160°
C. and has a composition;Sn (55-75 wt %) P (4-14 wt %) O (6-24 wt %) F (4-22 wt %) W (0.5-15 wt %). - View Dependent Claims (19, 20)
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Specification