| 摘要 |
<p>PURPOSE:To know easily the correct condition of a blade about its wear by forming plural pairs of resistance layers parallel to each other along a scribe line on the scribe line which extends in one direction and by equipping electrodes on both sides of the resistance layers. CONSTITUTION:Plural pairs of resistance layers 5-8 parallel to each other are formed along a scribe line 3a on the scribe line 3a which extends in one direction and electrodes 5a-8a are equipped on both sides of these resistance layers 5-8. By measuring the resistance between the electrode pads 5a-8a and 5b-8b which are formed on both sides of the resistance layer 5-8, it is easy to find which resistance layer is damaged. The extent of chipping, in other words, the damage condition of a diamond blade can be grasped by stages by knowing which resistance layer is damaged.</p> |
