| 摘要 |
PROBLEM TO BE SOLVED: To prevent corrosion of external conductor path and external contact connecting section by providing an external conductor path and external contact connection section composed of silver on the external surface of a sheet laminating body during or after the sintering process and then providing a metal protection film to the external conductor path and external contact connecting section. SOLUTION: A through-contact hole 1 is punched on the unbaked ceramic sheet and the through-contact hole 1 is filled with conductive paste such as silver paste. Next, a conductive path 2 consisting of a conductive material such as pure silver is printed on the ceramic sheet. Moreover, a laminated body 3 is formed by stacking the ceramic sheet and is then coupled in the pressing process. In addition, during or after the sintering process, an external conductive path 4 and external contact connecting section 5 consisting of silver are formed without formation of the intermediate conductive path 6. A metal protection film such as a nickel film or a gold film is formed on the external conductive path 4 and external contact connecting section 5 with an electrolytic plating process. |
