Patent US5013360A successfully refreshed from Google Patents.
US5013360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass compositions
Assignee: VLSI PACKAGING MATERIALS Inc A CA CORP
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Filing: 1989-09-15
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Granted: 1991-05-07
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Expires: 2009-09-15
Abstract
Abstract Fluid, stable glasses useful for low-temperature sealing applications are made by adding jointly bismuth oxide, zinc oxide, phosphorus pentoxide, titania and/or zirconium oxide to the lead oxide vanadium oxide binary. The phosphorus pentoxide may be replaced partially or entirely with niobium pentoxide and/or tantalum oxide. Sealing glass compositions comprising these low-melting lead-vanadia glasses in powder form and refractory fillers of lower thermal expansion for use in hermetically sealing semiconductor devices in ceramic packages are disclosed. Group V metal oxides, particularly niobium-containing oxides, are preferred fillers. Silver metal is a preferred filler for making die-attach compositions.
Inventors
- 👤 Leo Finkelstein
- 👤 Maurice E. Dumesnil
- 👤 Richard R. Tetschlag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:25
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/122; C03C14/00; C03C14/004; C03C8/00; C03C8/24; H; H10; H10W; H10W72/00; H10W72/30; H10W76/00; H10W76/60; C03C2214/00; C03C2214/04; C03C2214/08; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
84 words
A low-melting glass composition comprising, in weight percent calculated on an oxide basis: (a) PbO: 35-50% (b) V 2 O 5 : 35-50% (c) Bi 2 O 3 : 0.1-6% (d) P 2 O 5 , Nb 2 O 5 , Ta 2 O 5 , or combinations thereof: 0.1-8% (e) ZnO, MgO, CaO, BaO, SrO, or combinations thereof: 0.1-5% (f) TiO 2 , ZrO 2 , or combinations thereof: 0.1-5% wherein the combined weight percent of (c)+(d)+(e)+(f) is in the range of 0.4-24%.
Claim 2
Dependent Claim
84 words
A low-melting glass composition comprising, in weight percent calculated on an oxide basis: (a) PbO: 35-50% (b) V 2 O 5 : 35-50% (c) Bi 2 O 3 : 0.1-6% (d) P 2 O 5 , Nb 2 O 5 , Ta 2 O 5 , or combinations thereof: 0.1-8% (e) ZnO, MgO, CaO, BaO, SrO, or combinations thereof: 0.1-5% (f) TiO 2 , ZrO 2 , or combinations thereof: 0.1-5% wherein the combined weight percent of (c)+(d)+(e)+(f) is in the range of 0.4-24%.
Claim 3
Dependent Claim
72 words
The low-melting glass of claim 1 wherein the composition includes at least one additive selected from the group consisting of: up to 3% by weight B 2 O 3 , up to 3% by weight F., up to 3% by weight FeO, CoO, NiO, MnO, and/or CrO, up to 3% by weight WO 3 , up to 3% by weight MoO 3 , and up to 3% by weight Cs 2 O.
Claim 4
Dependent Claim
66 words
A low-melting glass composition comprising, in weight percent calculated on an oxide basis: ______________________________________
(a) PbO 35-45%
(b) V.sub.2 O.sub.5
35-45%
(c) ZnO 2-4%
(d) Bi.sub.2 O.sub.3
3-5%
(e) Nb.sub.2 O.sub.5
3-5%
(f) TiO.sub.2
0-4%
(g) ZrO.sub.2
0-4%
(h) P.sub.2 O.sub.5
0-4%
(i) B.sub.2 O.sub.3
0-2%
(j) CoO 0-3%
(k) F 0-1%
______________________________________ wherein the combined weight percent of (f)+(g) is in the range of 0.1-4%.
Claim 5
Dependent Claim
66 words
A low-melting glass composition comprising, in weight percent calculated on an oxide basis: ______________________________________
(a) PbO 35-45%
(b) V.sub.2 O.sub.5
35-45%
(c) ZnO 2-4%
(d) Bi.sub.2 O.sub.3
3-5%
(e) Nb.sub.2 O.sub.5
3-5%
(f) TiO.sub.2
0-4%
(g) ZrO.sub.2
0-4%
(h) P.sub.2 O.sub.5
0-4%
(i) B.sub.2 O.sub.3
0-2%
(j) CoO 0-3%
(k) F 0-1%
______________________________________ wherein the combined weight percent of (f)+(g) is in the range of 0.1-4%.
Claim 6
Dependent Claim
30 words
The glass of claim 1 mixed with about 1% to about 50% by weight, based on the mixture, of a refractory filler powder with a low coefficient of linear expansion.
Claim 7
Dependent Claim
14 words
The glass of claim 4 wherein the filler is a Group V metal oxide.
Claim 8
Dependent Claim
18 words
The glass of claim 5 wherein the filler is a niobium-containing oxide, a phosphate, or a tantalum-containing oxide.
Claim 9
Dependent Claim
11 words
The glass of claim 5 wherein the filler is niobium pentoxide.
Claim 10
Dependent Claim
30 words
The glass of claim 2 mixed with about 1% to about 50% by weight, based on the mixture, of a refractory filler powder with a low coefficient of linear expansion.
Claim 11
Dependent Claim
14 words
The glass of claim 8 wherein the filler is a Group V metal oxide.
Claim 12
Dependent Claim
18 words
The glass of claim 9 wherein the filler is a niobium-containing oxide, a phosphate, or a tantalum-containing oxide.
Claim 13
Dependent Claim
11 words
The glass of claim 9 wherein the filler is niobium pentoxide.
Claim 14
Dependent Claim
30 words
The glass of claim 3 mixed with about 1% to about 50% by weight, based on the mixture, of a refractory filler powder with a low coefficient of linear expansion.
Claim 15
Dependent Claim
14 words
The glass of claim 12 wherein the filler is a Group V metal oxide.
Claim 16
Dependent Claim
18 words
The glass of claim 13 wherein the filler is a niobium-containing oxide, a phosphate, or a tantalum-containing oxide.
Claim 17
Dependent Claim
11 words
The glass of claim 13 wherein the filler is niobium pentoxide.
Claim 18
Dependent Claim
21 words
The glass of claim 1 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 19
Dependent Claim
21 words
The glass of claim 2 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 20
Dependent Claim
21 words
The glass of claim 3 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 21
Dependent Claim
21 words
The glass of claim 4 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 22
Dependent Claim
21 words
The glass of claim 5 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 23
Dependent Claim
21 words
The glass of claim 6 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 24
Dependent Claim
21 words
The glass of claim 7 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 25
Dependent Claim
21 words
The glass of claim 8 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 26
Dependent Claim
21 words
The glass of claim 9 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 27
Dependent Claim
21 words
The glass of claim 10 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 28
Dependent Claim
21 words
The glass of claim 11 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 29
Dependent Claim
21 words
The glass of claim 12 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 30
Dependent Claim
21 words
The glass of claim 13 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 31
Dependent Claim
21 words
The glass of claim 14 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 32
Dependent Claim
21 words
The glass of claim 15 mixed with up to 90% by weight, based on the mixture, of silver or gold powder.
Claim 33
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 1.
Claim 34
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 2.
Claim 35
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 3.
Claim 36
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 4.
Claim 37
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 5.
Claim 38
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 6.
Claim 39
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 7.
Claim 40
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 8.
Claim 41
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 9.
Claim 42
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 10.
Claim 43
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 11.
Claim 44
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 12.
Claim 45
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 13.
Claim 46
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 14.
Claim 47
Dependent Claim
29 words
An article of manufacture for use in sealing an electronic part comprising a metal, glass, or ceramic body coated with a pattern of the glass composition of claim 15.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |