US5139975A
Expired / Lapsed
US
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Sintering arrangement for enhancing removal of carbon from ceramic substrate laminates
Assignee: International Business Machines Corp
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Filing: 1991-09-11
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Granted: 1992-08-18
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Expires: 2011-09-11
Abstract
Abstract There is disclosed a sintering arrangement for enhancing the removal of carbon from multilayer ceramic substrate laminate during the sintering thereof. A multilayer ceramic substrate laminate having metallic lines and vias is provided with a reducible metal oxide in close proximity to the substrate laminate. The multilayer ceramic substrate laminate contains a polymeric binder which upon heating depolymerizes into carbon. The substrate laminate is sintered in an atmosphere which is reducing with respect to the reducible metal oxide and which is oxidizing with respect to the carbon.
Inventors
- 👤 Lester W. Herron
- 👤 Sarah H. Knickerbocker
- 👤 Ananda H. Kumar
- 👤 Govindarajan Natarajan
- 👤 Srinivasa S. N. Reddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/638; B; B32; B32B; B32B18/00; C04B35/632; C04B35/634; H; H10; H10W; H10W70/00; H10W70/01; H10W70/05; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/658; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/345; C04B2237/348; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/56; C04B2237/565; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
A sintering arrangement for enhancing the removal of carbon from multilayer ceramic substrate laminates during the sintering thereof comprising: an unfired ceramic substrate laminate having nonoxide metallic lines and vias and containing a polymeric binder which upon heating depolymerizes into carbon; and a reducible metal oxide prior to sintering on at least one surface of the substrate laminate wherein the reducible metal oxide is chosen such that when the substrate laminate is sintered in an atmosphere which is oxidizing with respect to the carbon, the reducible metal oxide undergoes reduction to form an adherent layer of metallurgy on the surface of the multilayer ceramic substrate.
Claim 2
Dependent Claim
105 words
A sintering arrangement for enhancing the removal of carbon from multilayer ceramic substrate laminates during the sintering thereof comprising: an unfired ceramic substrate laminate having nonoxide metallic lines and vias and containing a polymeric binder which upon heating depolymerizes into carbon; and a reducible metal oxide prior to sintering on at least one surface of the substrate laminate wherein the reducible metal oxide is chosen such that when the substrate laminate is sintered in an atmosphere which is oxidizing with respect to the carbon, the reducible metal oxide undergoes reduction to form an adherent layer of metallurgy on the surface of the multilayer ceramic substrate.
Claim 3
Dependent Claim
17 words
The sintering arrangement of claim 1 wherein the metallic liens and vias are copper or copper alloys.
Claim 4
Dependent Claim
26 words
The sintering arrangement of claim 1 wherein the reducible metal oxide is a copper oxide selected from the group consisting of CuO and Cu 2 O.
Claim 5
Dependent Claim
14 words
The sintering arrangement of claim 1 wherein the polymeric binder comprises polyvinyl butyral resin.
Claim 6
Dependent Claim
27 words
The sintering arrangement of claim 1 wherein the ceramic substrate laminate comprises a ceramic selected from the group consisting of cordierite glass ceramics and spodumene glass ceramics.
Claim 7
Dependent Claim
104 words
A sintering arrangement for enhancing the removal of carbon from multilayer ceramic substrate laminates during the sintering thereof, comprising: an unfired multilayer ceramic substrate laminate having nonoxide metallic lines and vias and a polymeric binder which upon heating depolymerizes into carbon; and at least one setter tile proximate with the multilayer ceramic substrate laminate, the setter tile comprising refractory oxide and a reducible metal oxide prior to sintering wherein the reducible metal oxide is chosen such that upon sintering the ceramic substrate laminate in an atmosphere which is oxidizing with respect to the carbon, the reducible metal oxide undergoes reduction to the non-oxide form.
Claim 8
Dependent Claim
104 words
A sintering arrangement for enhancing the removal of carbon from multilayer ceramic substrate laminates during the sintering thereof, comprising: an unfired multilayer ceramic substrate laminate having nonoxide metallic lines and vias and a polymeric binder which upon heating depolymerizes into carbon; and at least one setter tile proximate with the multilayer ceramic substrate laminate, the setter tile comprising refractory oxide and a reducible metal oxide prior to sintering wherein the reducible metal oxide is chosen such that upon sintering the ceramic substrate laminate in an atmosphere which is oxidizing with respect to the carbon, the reducible metal oxide undergoes reduction to the non-oxide form.
Claim 9
Dependent Claim
19 words
The sintering arrangement of claim 6 wherein the setter tile is in direct contact with the ceramic substrate laminate.
Claim 10
Dependent Claim
25 words
The sintering arrangement of claim 6 wherein the setter tile comprises a plurality of layers of refractory oxide having the reducible metal oxide screened thereon.
Claim 11
Dependent Claim
20 words
The sintering arrangement of claim 6 wherein the setter tile comprises refractory oxide having the reducible metal oxide dispersed therein.
Claim 12
Dependent Claim
13 words
The sintering arrangement of claim 6 wherein the setter tile is partially sintered.
Claim 13
Dependent Claim
24 words
The sintering arrangement of claim 6 wherein the refractory oxide is selected from the group consisting of alumina, silica, magnesia, zirconia and mixtures thereof.
Claim 14
Dependent Claim
17 words
The sintering arrangement of claim 1 wherein the metallic liens and vias are copper or copper alloys.
Claim 15
Dependent Claim
26 words
The sintering arrangement of claim 6 wherein the reducible metal oxide is a copper oxide selected from the group consisting of CuO and Cu 2 O.
Claim 16
Dependent Claim
14 words
The sintering arrangement of claim 6 wherein the polymeric binder comprising polyvinyl butyral resin.
Claim 17
Dependent Claim
27 words
The sintering arrangement of claim 6 wherein the ceramic substrate laminate comprises a ceramic selected from the group consisting of cordierite glass ceramics and spodumene glass ceramics.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |