| 摘要 |
<p>PURPOSE:To reduce the rate of change of resistance value during re-heating process, and improve yield by containing the following at a specified ratio; glass powder containing specified % of PbO and SiO2, powder of at least one kind out of RuO2, Pb2Ru2O6-7, and Bi2Ru2O6-7, organic vehicle, and B2O3 powder. CONSTITUTION:When glass powder containing 35-70wt.% of PbO and 15-40wt.% of SiO2 exceeds 50wt.%, the resistance value becomes too high. When it is less than 10wt.%, the bonding strength of a coating film to a substratum decreases, and therefore 0-50wt.% is desirable. When the addition range of RuO2 and the like is less than 5wt.%, the resistance value becomes too high, the environmental stability deteriorates, and the fluctuation of resistance value increases, so the above range is set as 5-40wt.%. The compounding ratio of organic vehicle indispensable to printing is set at 20-40wt.%. In order to stabilize the resistance value for re-heating, B2O3 is added in the range of 0.2-5.0wt.%. Thereby composition for a resistance coating film which can make the change of resistance value cased by re-heating smaller than the conventional film can be obtained.</p> |
