| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceramic circuit board which has projections of a brazing material with less variations in the length of the projections and without degrading an electric insulation property thereof. SOLUTION: An active metal brazing material 2 is printed, and then stopper materials 3 lower than the height of the brazing layer after joined thereto are provided to be spaced from ends of the brazing material layer. Therefore a chemical processing time required for brazing material removal, chemical polishing, etc. is reduced. A variation in the length of the brazing material projections 7 is set not to be larger than 200μm and a surface modification layer of a ceramic board 1 is set to have a maximum thickness not larger than 15μm. COPYRIGHT: (C)2008,JPO&INPIT |
