| 摘要 |
PURPOSE:To directly bond and fix a shield case with an upper side ceramic diaphragm and to strengthen the adhering strength by clamping a conductive layer with the upper and a lower ceramic diaphragms. CONSTITUTION:Aluminium powder and additive are weighed and mixed, organic resin what is called as an organic binder is mixed to the obtained product to form a mixture split, the mixture split is formed in a form of paper, thereby the lower ceramic diaphragm 2, what is called as a green sheet, is formed. Then, paste having the essential component of tungsten powder is screen printed on the upper surface of the lower ceramic diaphragm 2 to form the conductive layer 4. The upper ceramic diaphragm 3 formed similarly is adhered to the lower ceramic diaphragm 2 and the conductive layer 4 is held between the upper and the lower ceramic diaphragms 2, 3 in the form of sandwich to constitute the diaphragm 1.
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