Process of manufacturing ceramic circuit board
First Claim
1. A process for manufacturing a ceramic circuit board, wherein at least dielectric ceramics and a conductor paste of base metal are co-fired, comprising the steps of:
- preparing said conductor paste of base metal containing an organic material which is thermally decomposed at a temperature higher than a decomposition point of an organic binder contained in said dielectric ceramics;
forming a circuit pattern of said conductor paste containing said organic material;
thermally decomposing said organic binder in an oxidizing atmosphere at a temperature lower than said decomposition point of said organic material; and
thermally decomposing said organic material in an atmosphere having a partial oxygen pressure lower than that of said oxidizing atmosphere.
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Accused Products
Abstract
A process of manufacturing a ceramic circuit board, wherein at least dielectric ceramics and a conductor paste of base metal are co-fired, comprising the steps of preparing the conductor paste containing an organic material which is thermally decomposed at a temperature higher than a decomposition point of an organic binder contained in the dielectric ceramics, and forming a circuit pattern of the conductor paste containing the organic material. Alternatively, the process comprises the steps of forming the circuit pattern of the conductor paste and covering the formed circuit pattern with the organic material. The process further comprises the steps of thermally decomposing the organic binder in an oxidizing atmosphere at a temperature lower than the decomposition point of the organic material, and thermally decomposing the organic material in an atmosphere having a partial oxygen pressure lower than that of the oxidizing atmosphere.
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Citations
30 Claims
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1. A process for manufacturing a ceramic circuit board, wherein at least dielectric ceramics and a conductor paste of base metal are co-fired, comprising the steps of:
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preparing said conductor paste of base metal containing an organic material which is thermally decomposed at a temperature higher than a decomposition point of an organic binder contained in said dielectric ceramics; forming a circuit pattern of said conductor paste containing said organic material; thermally decomposing said organic binder in an oxidizing atmosphere at a temperature lower than said decomposition point of said organic material; and thermally decomposing said organic material in an atmosphere having a partial oxygen pressure lower than that of said oxidizing atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A process of manufacturing a ceramic circuit board, werein at least dielectric ceramics and a conductor paste of base metal are co-fired, comprising the steps of:
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forming a circuit pattern of said conductor paste of base metal; covering the formed circuit pattern with an organic material which is thermally decomposed at a temperature higher than a decomposition point of an organic binder contained in said dielectric ceramics; thermally decomposing said organic binder in an oxidizing atmosphere at a temperature lower than said decomposition point of said organic material; and thermally decomposing said organic material in an atmosphere having a partial oxygen pressure lower than that of said oxidizing atmosphere. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification