| 摘要 |
<p>In an ink jet recording head having a structure wherein grooves (3) are formed on a piezo-electric ceramic substrate (1) by cutting work and the resulting side walls (4) of the grooves are driven to thereby jet ink in the grooves, fine cracks appear in the surface layer portion of the side wall during the cutting work. The cracks occurring in the surface layer portion of the side walls (4) are penetrated by an oxide (5) so as to mend them. The piezo-electric ceramic substrate with the grooves is coated with a solution obtained by dissolving the constituent elements of the oxide in a solvent, and is fired so that the side walls are reinforced. <IMAGE> <IMAGE></p> |
