CERAMIC SUBSTRATE AND PARTIAL GRAZE SUBSTRATE USING IT

PROBLEM TO BE SOLVED: To provide a ceramic substrate in which pores existing on the surface have a small diameter and a wiring pattern can be deposited without causing any open circuit or short circuit. SOLUTION: The ceramic substrate principally comprises 96-99 wt.% of Al2O3 and the remainder princ...

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1. Verfasser:	HAMAMURA KENICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a ceramic substrate in which pores existing on the surface have a small diameter and a wiring pattern can be deposited without causing any open circuit or short circuit. SOLUTION: The ceramic substrate principally comprises 96-99 wt.% of Al2O3 and the remainder principally comprises SiO2 and MgO wherein the weight ratio of MgO/SiO2 is not lower than 1. Internal pores have a diameter not larger than 20 μm and the porosity is not higher than 2%.