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US5889322A
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US
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Low-temperature calcined ceramics
Assignee: Kyocera Corp
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Filing: 1997-12-01
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Granted: 1999-03-30
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Expires: 2017-12-01
Abstract
Abstract A low-temperature calcined ceramic of the present invention comprises a sintered body obtained by calcining a mixture of a glass and an SiO2 filler such as quartz or cristobalite, wherein the sintered body contains an SiO2 crystal having an X-ray diffraction image that the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05 DEG (2 theta ) to the lower angle side. The ceramic containing the shifted crystal of quarts or cristobalite does not have a region of abruptly changing the thermal expansion and has a substantially linear thermal expansion curve. Accordingly, when the ceramic is used as an insulating substrate of a wiring boad, there is no possibility of abruptly causing the thermal expansion by heating, etc., at mounting on an external electric circuit boad and the occurrence of the inferior connection, etc., by thermal expansion can be effectively prevented.
Inventors
- 👤 Noriaki Hamada
- 👤 Kouichi Yamaguchi
- 👤 Hideto Yonekura
- 👤 Kenichi Nagae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:28
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H10W70/68; H10W70/682; H10W72/00; H10W72/071; H10W72/075; H10W72/90; H10W72/951; H10W72/952; H10W74/00; H10W90/00; H10W90/701; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A low-temperature calcined ceramic comprising a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler, wherein the sintered body contains an SiO 2 crystal having an X-ray diffraction image in which the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 2
Dependent Claim
58 words
A low-temperature calcined ceramic comprising a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler, wherein the sintered body contains an SiO 2 crystal having an X-ray diffraction image in which the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 3
Dependent Claim
16 words
A low-temperature calcined ceramic of claim 1, wherein the SiO 2 filler is quartz or cristobalite.
Claim 4
Dependent Claim
24 words
A low-temperature calcined ceramic of claim 1, wherein the sintered body contains an enstatite crystal having an average aspect ratio of at least 3.
Claim 5
Dependent Claim
82 words
A wiring body comprising an insulating substrate having a metallized wiring layer formed on the surface or in the inside thereof, wherein the insulating substrate is made up of a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler and the sintered body contains an SiO 2 crystal having an X-ray diffraction image in which the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 6
Dependent Claim
82 words
A wiring body comprising an insulating substrate having a metallized wiring layer formed on the surface or in the inside thereof, wherein the insulating substrate is made up of a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler and the sintered body contains an SiO 2 crystal having an X-ray diffraction image in which the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 7
Dependent Claim
15 words
A wiring boad of claim 4, wherein the SiO 2 filler is quartz or cristobalite.
Claim 8
Dependent Claim
100 words
A mounted structure of a package for accommodating a semiconductor formed by connecting a package for accommodating a semiconductor having a wiring boad comprising an insulating substrate having a metallized layer formed on the surface or in the inside thereof, wherein the insulating substrate is made up of a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler and the sintered material contains an SiO 2 crystal having an X-ray diffraction image that the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 9
Dependent Claim
100 words
A mounted structure of a package for accommodating a semiconductor formed by connecting a package for accommodating a semiconductor having a wiring boad comprising an insulating substrate having a metallized layer formed on the surface or in the inside thereof, wherein the insulating substrate is made up of a sintered body obtained by calcining a mixture of a glass and an SiO 2 filler and the sintered material contains an SiO 2 crystal having an X-ray diffraction image that the peak at the (101) plane of quartz or cristobalite is shifted at least 0.05° (2θ) to the lower angle side.
Claim 10
Dependent Claim
15 words
A mounted structure of claim 6, wherein the SiO 2 filler is quartz or cristobalit.
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) | 2002-03-29 | 2002-09-28 | 2003-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-29 | 2006-09-28 | 2007-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-29 | 2010-09-28 | 2011-03-30 | $7700.00 | Window Closed / Lapsed |