| 摘要 |
PURPOSE:To prevent the deterioration of printing quality attributable to the abrasion of a head tip by forming an electrode pattern consisting chiefly of tungsten on a ceramic base having the same as or lower hardness than tungsten. CONSTITUTION:As a material for a ceramic layer 8 which becomes an electrode base, the ceramic having almost the same hardness as that of an electrode 7 containing tungsten as a main component is used. That is, the Vicker's hardness of tungsten is 600-800 and therefore forsterite and mullite are suitable as materials for the ceramic layer 8. The hardness of the ceramic layer 8 may be actually lower than the Vickers' hardness of tungsten, and of practical use provided it is at least over 200. The Vickers' hardness of forsterite is 800 and that of moulite 500. Thus the use of the above-mentioned base materials enables the cross-section of a recording head tip to have no generation of a stepped from even after long time of a recording and contributes to the prevention of deterioration of a head touch. |
