US4985098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing ceramic laminate
Assignee: Murata Manufacturing Co Ltd
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Filing: 1989-02-16
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Granted: 1991-01-15
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Expires: 2009-02-16
Abstract
Abstract Disclosed is a method of manufacturing a ceramic laminate which is adapted to manufacture a laminated ceramic capacitor, for example. This method includes the steps of stacking a plurality of ceramic green sheets containing ceramic powder and a first binder on a base and forming a metal paste film containing metal powder and a second binder for providing an internal electrode on an upper major surface of a prescribed one of the ceramic green sheets during the stacking step. In such a method, a junction member containing a solvent which can commonly dissolve the first and second binders is prepared in order to join the plurality of ceramic green sheets with no application of pressure, to be applied between adjacent pairs of plurality of ceramic green sheets, which are stacked with each other. The junction member joins the adjacent pairs of ceramic green sheets with each other through chemical action.
Inventors
- 👤 Yoshiaki Kohno
- 👤 Norio Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:35
CPC Classifications
B; B32; B32B; B32B18/00; H; H01; H01G; H01G4/00; H01G4/30; H01G4/308; C; C04; C04B; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/345; C04B2237/346; C04B2237/50; C04B2237/68; C04B2237/70; C04B2237/704; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
122 words
A method of manufacturing a ceramic laminate comprising the following steps: preparing a plurality of ceramic green sheets containing a first ceramic powder and a first binder; preparing a metal paste, containing a metal powder and a second binder; preparing a junction member containing a solvent which can commonly dissolve said first binder and said second binder; preparing a base for receiving said plurality of ceramic green sheets thereon; stacking said plurality of ceramic green sheets on said base and applying said junction member to the interface between each adjacent pair of said plurality of ceramic green sheets; and forming a film of said metal paste in the interface between at least one adjacent pair of said plurality of ceramic green sheets.
Claim 2
Independent Claim
122 words
A method of manufacturing a ceramic laminate comprising the following steps: preparing a plurality of ceramic green sheets containing a first ceramic powder and a first binder; preparing a metal paste, containing a metal powder and a second binder; preparing a junction member containing a solvent which can commonly dissolve said first binder and said second binder; preparing a base for receiving said plurality of ceramic green sheets thereon; stacking said plurality of ceramic green sheets on said base and applying said junction member to the interface between each adjacent pair of said plurality of ceramic green sheets; and forming a film of said metal paste in the interface between at least one adjacent pair of said plurality of ceramic green sheets.
Claim 3
Dependent Claim
40 words
A method in accordance with claim 1, wherein said step of stacking said plurality of ceramic green sheets comprises the step of placing a second one of each adjacent pair of said ceramic green sheets on a first one thereof.
Claim 4
Dependent Claim
33 words
A method in accordance with claim 2, wherein one said junction member is applied on a surface of said first ceramic green sheet facing said second ceramic green sheet before said stacking step.
Claim 5
Dependent Claim
33 words
A method in accordance with claim 2, wherein one said junction member is applied on a surface of said second ceramic green sheet facing said first ceramic green sheet before said stacking step.
Claim 6
Dependent Claim
33 words
A method in accordance with claim 2, wherein respective said junction members are applied on respective surfaces on both said first and second ceramic green sheets facing each other before said stacking step.
Claim 7
Dependent Claim
50 words
A method in accordance with claim 2, wherein said second ceramic green sheet is held by carrier means and placed on said first ceramic green sheet while being held by said carrier means, said method further comprising the step of separating said carrier means from said second ceramic green sheet.
Claim 8
Dependent Claim
28 words
A method in accordance with claim 1, wherein said junction member comprises ceramic slurry containing a second ceramic powder and a third binder in addition to said solvent.
Claim 9
Dependent Claim
39 words
A method in accordance with claim 7, wherein said first ceramic powder and said second ceramic powder are identical in composition to each other, and said first binder and said third binder are identical in composition to each other.
Claim 10
Dependent Claim
39 words
A method in accordance with claim 7, wherein said first ceramic powder and said second ceramic powder are identical in composition to each other, and said first binder and said third binder are different in composition from each other.
Claim 11
Dependent Claim
39 words
A method in accordance with claim 7, wherein said first ceramic powder and said second ceramic powder are different in composition from each other, and said first binder and said third binder are identical in composition to each other.
Claim 12
Dependent Claim
39 words
A method in accordance with claim 7, wherein said first ceramic powder and said second ceramic powder are different in composition from each other and said first binder and said third binder are different in composition from each other.
Claim 13
Dependent Claim
38 words
A method in accordance with claim 1, wherein said plurality of ceramic green sheets include at least two types of ceramic green sheets, at least one of which contains materials of different composition from said first ceramic powder.
Claim 14
Dependent Claim
57 words
A method in accordance with claim 1, wherein said junction member is applied to a region of one of said ceramic green sheets containing said interface but not substantially applied to a region of said ceramic green sheet containing said interface in which said metal paste film is provided, in said step of applying said junction member.
Claim 15
Dependent Claim
35 words
A method in accordance with claim 1, wherein said metal paste film is formed on a prescribed one of said ceramic green sheets by printing, after positioning said green sheet by means of said base.
Claim 16
Independent Claim
158 words
A method of manufacturing a ceramic laminate for a laminated ceramic capacitor comprising the following steps: preparing a plurality of ceramic green sheets containing a first ceramic powder and a first binder; preparing a metal paste, containing a metal powder and a second binder, for providing an internal electrode of said capacitor, and forming at least two films of said metal paste in the respective interfaces between at least two respective pairs of said plurality of ceramic green sheets; preparing a junction member containing a solvent capable of commonly dissolving said first binder and said second binder; preparing a base for receiving said plurality of ceramic green sheets thereon; stacking said plurality of ceramic green sheets with one of said junction members being applied to the interface between each adjacent pair of said plurality of ceramic green sheets; said metal paste films being formed in said interfaces by printing, after positioning said ceramic green sheets via said base.
Claim 17
Independent Claim
158 words
A method of manufacturing a ceramic laminate for a laminated ceramic capacitor comprising the following steps: preparing a plurality of ceramic green sheets containing a first ceramic powder and a first binder; preparing a metal paste, containing a metal powder and a second binder, for providing an internal electrode of said capacitor, and forming at least two films of said metal paste in the respective interfaces between at least two respective pairs of said plurality of ceramic green sheets; preparing a junction member containing a solvent capable of commonly dissolving said first binder and said second binder; preparing a base for receiving said plurality of ceramic green sheets thereon; stacking said plurality of ceramic green sheets with one of said junction members being applied to the interface between each adjacent pair of said plurality of ceramic green sheets; said metal paste films being formed in said interfaces by printing, after positioning said ceramic green sheets via said base.
Claim 18
Dependent Claim
35 words
A method in accordance with claim 14, further comprising a step of drying said metal paste film after formation of said metal paste film, in advance of stacking a subsequent said ceramic green sheet thereon.
Claim 19
Dependent Claim
33 words
A method in accordance with claim 2, wherein said second ceramic green sheet is held by carrier means, then separated from said carrier means, and then placed on said first ceramic green sheet.
Claim 20
Dependent Claim
25 words
A method in accordance with claim 1, wherein said base comprises a rigid plate made of a material with a low coefficient of thermal expansion.
Claim 21
Dependent Claim
23 words
A method in accordance with claim 18, wherein said material is selected from the group consisting of super invar, glass, and a ceramic.
Claim 22
Dependent Claim
17 words
A method in accordance with claim 18, further comprising an elastic layer formed on the rigid plate.
Claim 23
Dependent Claim
16 words
A method in accordance with claim 20, wherein said elastic layer is made of silicone rubber.
Claim 24
Dependent Claim
24 words
A method in accordance with claim 20, wherein said elastic layer has a thickness of about 1-5 mm and a hardness of about 40-80.
Claim 25
Dependent Claim
15 words
A method in accordance with claim 18, wherein said base further comprises a resin film.
Claim 26
Dependent Claim
16 words
A method in accordance with claim 23, wherein said resin film is made of polyethylene terephthalate.
Claim 27
Dependent Claim
36 words
A method in accordance with claim 1, wherein said ceramic green sheets contain barium titanate ceramic powder as said first ceramic powder and about 13 percent by weight of an acrylic binder as said first binder.
Claim 28
Dependent Claim
22 words
A method in accordance with claim 25, wherein said ceramic green sheets are formed from a ceramic slurry containing a delay solvent.
Claim 29
Dependent Claim
16 words
A method in accordance with claim 26, wherein said delay solvent is BCA (butyl carbitol acetate).
Claim 30
Dependent Claim
17 words
A method in accordance with claim 1, wherein said first ceramic powder is an alumina ceramic material.
Claim 31
Dependent Claim
22 words
A method in accordance with claim 1, wherein said first binder is selected from the group consisting of cellulose and vinyl binders.
Claim 32
Dependent Claim
22 words
A method in accordance with claim 16, wherein said junction member is formed on said metal paste film and dried simultaneously therewith.
Claim 33
Dependent Claim
20 words
A method in accordance with claim 31, wherein a further ceramic green sheet and metal paste film are formed thereafter.
Claim 34
Dependent Claim
26 words
A method in accordance with claim 16, wherein said junction member is formed on said metal paste film after said metal paste film has been dried.
Claim 35
Dependent Claim
20 words
A method in accordance with claim 32, wherein a further ceramic green sheet and metal paste film are formed thereafter.
Claim 36
Dependent Claim
32 words
A method in accordance with claim 9, wherein one of said first and third binders is an aqueous binder and the other of said first and third binders is an organic binder.
Claim 37
Dependent Claim
32 words
A method in accordance with claim 12, wherein one of said ceramic powders is selected to form dielectric sheets and the other of said ceramic powders is selected to form magnetic sheets.
References Cited (Backward Citations)
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |