Copper paste composition
First Claim
1. A copper paste composition comprising about 95 to about 70 percent by weight of inorganic components and about 5 to about 30 percent by weight of organic vehicle components, said inorganic components comprising a powdered refractory material, and copper powder including cuprous oxide powder and cupric oxide powder in amounts such that about 10 to about 15 parts by weight of cuprous oxide powder, about 12 to about 17 parts by weight of cupric oxide powder, and about 7 to about 12 parts by weight of powdered refractory material, are included for each 100 parts by weight of copper powder.
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Accused Products
Abstract
A copper paste composition for low temperature firing on a ceramic substrate is comprised of inorganic components and organic vehicle components. The inorganic components mainly consist of cooper powder, cuprous oxide powder, cupric oxide powder and glass powder. The mixing ratio off the inorganic components of this composition is 100 parts by weight of copper powder, about 10 to 15 parts by weight of cuprous oxide powder, about 12 to 17 parts by weight of cupric oxide powder, and about 7 to 12 parts by weight of glass powder. The mixing ratio of the inorganic components with the organic vehicle components is about 95 to 70 parts by weight of the organic vehicle components. Also the the average particle size of the copper powder is in a range of about 0.5 to 3 μm and the oxygen content of the copper powder is about 0.05 to 0.15 weight percent.
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Citations
16 Claims
- 1. A copper paste composition comprising about 95 to about 70 percent by weight of inorganic components and about 5 to about 30 percent by weight of organic vehicle components, said inorganic components comprising a powdered refractory material, and copper powder including cuprous oxide powder and cupric oxide powder in amounts such that about 10 to about 15 parts by weight of cuprous oxide powder, about 12 to about 17 parts by weight of cupric oxide powder, and about 7 to about 12 parts by weight of powdered refractory material, are included for each 100 parts by weight of copper powder.
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15. A copper paste composition for low temperature firing comprised of copper powder with an oxygen content between about 0.05 to 0.15 weight percent, cuprous oxide powder, cupric oxide powder, and organic vehicle components in amounts such that about 10 to about 15 parts by weight of cuprous oxide powder and about 12 to about 17 parts by weight of cupric oxide powder are included for each 100 parts by weight of copper powder.
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16. In a copper paste composition for low temperature firing wherein copper powder is blended into a paste including a binder, a solvent and a powdered refractory material, the paste is applied to a substrate and fired at a temperature sufficient to remove the solvent and the binder from the copper powder and the powdered refractory material and to adhere the copper powder, bound in the refractory material adhered to the substrate, the improvement comprising the copper powder including about 10 to about 15 parts by weight of cuprous oxide powder and about 12 to about 17 parts by weight of cupric oxide powder for each 100 parts by weight of copper powder.
Specification