| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a thick-film resistance paste, having high EDS characteristic (high withstand voltage pulse characteristic) and which does not contain such harmful substance as Pd, Cd, Ni, etc., for obtaining a ceramic circuit board having superior performance. SOLUTION: A film resistance paste is prepared by adding an organic vehicle, a solvent, and a dispersant to a mixture prepared by mixing raw material powder composed of glass powder and conductive material powder with the organic vehicle. The mixture is prepared for satisfying the relation, 5.5A<=B<= 10.0A (where A represents the mean specific surface area (Am<2> /g) of the raw material powder, when the minor-axis diameter of the powder is less than or equal to 5μm and the volumetric ratio (%) of the vehicle to the raw material powder is B). At the manufacturing of the paste, the raw material powder is dispersed in the organic vehicle by forcibly passing the raw material mixture through a clearances of less than or equal to 5μm in width.</p> |
