Patent US1196211A successfully refreshed from Google Patents.
US20030113554A1
Expired / Lapsed
US
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Glass ceramic laminate becoming relatively high in bending strength after fired
Assignee: Nippon Electric Glass Co Ltd
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Filing: 2002-08-20
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Granted: —
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Expires: 2022-08-20
Abstract
Abstract In a sintered glass ceramic product including at least three layers each of which is formed by a glass ceramic material, the layers are stacked to be substantially symmetrical in a stacking direction and integrally sintered. Among the sintered layers, each of outermost layers and an inner layer adjacent thereto have crystal phases different from each other. Each of the outermost layers and the inner layer have thermal expansion coefficients α1 and α2 selected so that the relationship given by 0<α2−α1<5 ppm is satisfied.
Inventors
- 👤 Yoshio Umayahara
- 👤 Yoshikatsu Nishikawa
- 👤 Kazuyoshi Shindo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185; B; B32; B32B; B32B17/00; B32B17/06; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; C03C3/089; C03C3/095; C03C3/102; C04B35/195; C04B35/22; C04B37/00; C04B37/04; H; H05; H05K; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629; H05K3/4688; B32B2307/00; B32B2307/50; B32B2307/546; B32B2315/00; B32B2315/02; B32B2315/08; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3213; C04B2235/3217; C04B2235/3224; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/3284; C04B2235/3296; C04B2235/34; C04B2235/3409; C04B2235/3418; C04B2235/3427; C04B2235/3463; C04B2235/36; C04B2235/365; C04B2235/70; C04B2235/80; C04B2235/96; C04B2235/9607; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/345; C04B2237/346; H05K1/00; H05K1/02; H05K1/0271; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/06; H05K2201/068; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
1 . A glass ceramic laminate comprising at least three glass ceramic layers stacked and press-bonded to be substantially symmetrical in a stacking direction, each of outermost ones of the glass ceramic layers and an inner layer adjacent thereto being formed by glass ceramic materials which, when fired, have crystal phases different from each other, each of the outermost layers having a first thermal expansion coefficient α1, the inner layer having a second thermal expansion coefficient α2, the relationship between the first and the second thermal expansion coefficients α1 and α2 being given by 0<α2−α1<5 ppm.
Claim 2
Dependent Claim
96 words
1 . A glass ceramic laminate comprising at least three glass ceramic layers stacked and press-bonded to be substantially symmetrical in a stacking direction, each of outermost ones of the glass ceramic layers and an inner layer adjacent thereto being formed by glass ceramic materials which, when fired, have crystal phases different from each other, each of the outermost layers having a first thermal expansion coefficient α1, the inner layer having a second thermal expansion coefficient α2, the relationship between the first and the second thermal expansion coefficients α1 and α2 being given by 0<α2−α1<5 ppm.
Claim 3
Dependent Claim
48 words
2 . The glass ceramic laminate according to claim 1 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —B 2 O 3 glass ceramic material while the inner layer is formed by a SiO 2 —CaO—MgO glass ceramic material.
Claim 4
Dependent Claim
45 words
3 . The glass ceramic laminate according to claim 1 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —CaO glass ceramic material while the inner layer is formed by a SiO 2 —CaO—MgO glass ceramic material.
Claim 5
Dependent Claim
49 words
4 . The glass ceramic laminate according to claim 1 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —SrO glass ceramic material while the inner layer is formed by a SiO 2 —Al 2 O 3 —CaO glass ceramic material.
Claim 6
Dependent Claim
46 words
5 . The glass ceramic laminate according to claim 1 , wherein each of the outermost layers is formed by a SiO 2 —CaO—MgO glass ceramic material while the inner layer is formed by a SiO 2 —TiO 2 —Nd 2 O 3 glass ceramic material.
Claim 7
Dependent Claim
92 words
6 . A sintered glass ceramic product comprising at least three layers formed by glass ceramic materials which are stacked to be substantially symmetrical in a stacking direction and integrally sintered, each of outermost ones of the layers and an inner layer adjacent thereto having crystal phases different from each other, each of the outermost layers having a first thermal expansion coefficient α1, the inner layer having a second thermal expansion coefficient α2, the relationship between the first and the second thermal expansion coefficients α1 and α2 being given by 0<α2−α1<5 ppm.
Claim 8
Dependent Claim
92 words
6 . A sintered glass ceramic product comprising at least three layers formed by glass ceramic materials which are stacked to be substantially symmetrical in a stacking direction and integrally sintered, each of outermost ones of the layers and an inner layer adjacent thereto having crystal phases different from each other, each of the outermost layers having a first thermal expansion coefficient α1, the inner layer having a second thermal expansion coefficient α2, the relationship between the first and the second thermal expansion coefficients α1 and α2 being given by 0<α2−α1<5 ppm.
Claim 9
Dependent Claim
30 words
7 . The sintered glass ceramic product according to claim 6 , wherein each of the outermost layers has a compressive stress while the inner layer has a tensile stress.
Claim 10
Dependent Claim
49 words
8 . The sintered glass ceramic product according to claim 6 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —B 2 O 3 glass ceramic material while the inner layer is formed by a SiO 2 —CaO—MgO glass ceramic material.
Claim 11
Dependent Claim
46 words
9 . The sintered glass ceramic product according to claim 6 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —CaO glass ceramic material while the inner layer is formed by a SiO 2 —CaO—MgO glass ceramic material.
Claim 12
Dependent Claim
50 words
10 . The sintered glass ceramic product according to claim 6 , wherein each of the outermost layers is formed by a SiO 2 —Al 2 O 3 —SrO glass ceramic material while the inner layer is formed by a SiO 2 —Al 2 O 3 —CaO glass ceramic material.
Claim 13
Dependent Claim
47 words
11 . The sintered glass ceramic product according to claim 6 , wherein each of the outermost layers is formed by a SiO 2 —CaO—MgO glass ceramic material while the inner layer is formed by a SiO 2 —TiO 2 —Nd 2 O 3 glass ceramic material.
References Cited (Backward Citations)
US20020048666A1
Cited
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