Wiring substrate and bonding pad composition
First Claim
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1. A wiring substrate comprising:
- a substrate main body made of a glass-ceramic comprising Al2O3 ceramic, and having a front surface and a back surface;
a pad formed on at least one of the front surface and the back surface of said substrate main body; and
a conductor pin provided in an upright position on said pad via solder, wherein said pad is comprised of;
a ceramic that is the same as the Al2O3 ceramic of said glass-ceramic;
Fe converted into Fe2O3; and
Cu said Fe2O3 comprising 1 to 28 parts by weight with respect to 100 parts by weight of said Cu.
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Abstract
A wiring substrate comprised of a substrate main body made of glass-ceramic, a pad formed on a surface of the substrate main body and a conductor pin provided in an upright position on the pad. The pad is comprised of a ceramic that is the same as the ceramic constituting the glass-ceramic, Fe converted into Fe2O3 and Cu. The Fe2O3 comprises 1 to 28 parts by weight with respect to 100 parts by weight of the Cu.
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Citations
8 Claims
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1. A wiring substrate comprising:
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a substrate main body made of a glass-ceramic comprising Al2O3 ceramic, and having a front surface and a back surface; a pad formed on at least one of the front surface and the back surface of said substrate main body; and a conductor pin provided in an upright position on said pad via solder, wherein said pad is comprised of; a ceramic that is the same as the Al2O3 ceramic of said glass-ceramic; Fe converted into Fe2O3; and Cu said Fe2O3 comprising 1 to 28 parts by weight with respect to 100 parts by weight of said Cu. - View Dependent Claims (2)
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3. A wiring substrate comprising:
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a substrate main body made of a glass-ceramic comprising Al2O3 ceramic, and having a front surface and a back surface; a pad formed on at least one of the front surface and the back surface of said substrate main body; a surface layer pad formed on the front surface of said pad; and a conductor pin provided in an upright position on said surface layer pad via solder, wherein said pad is comprised of a ceramic that is the same as the Al2O3 ceramic of said glass-ceramic, Fe converted into Fe2O3, and Cu, said Fe2O3 comprising 1 to 28 parts by weight with respect to 100 parts by weight of said Cu, and wherein said surface layer pad is comprised of Cu and Fe, wherein the content of Fe converted into Fe2O3 in said surface layer pad is less than the content of Fe converted into Fe2O3 in said pad. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification