| 摘要 |
PURPOSE:To obtain a circuit board, which has a thermal expansion identical with that of gallium-arsenic and is formed with a metal wiring consisting of copper or the like, by a method wherein the circuit board consists of a ceramic plate containing alumina, silicon dioxide and zirconia, which are respectively set at a specified amount. CONSTITUTION:A circuit board consists of a ceramic plate containing at least 4 to 17wt.% alumina, 20 to 55wt.% silicon dioxide and 10 to 50wt.% zirconia and has at least one side of a wiring, which is provided extendedly on this ceramic plate and consists of a metal layer, and a wiring, which is formed penetrating the ceramic plate and consists of a metal layer. In order to manufacture the circuit board, at least one side of a wiring, which is provided extendedly on the molded material of a mixture of aluminosilicate glass and glass silicate and consists of a metal layer, and a wiring, which is formed penetrating this molded material and consists of a metal layer, is formed on this molded material, a green sheet consisting of the molded material of a mixture is formed and the green sheet is fired at a temperature between the softening point of the aluminosilicate glass and the softening point of the glass silicate. |
