Working method for ferrite single crystal

Abstract

Abstract PURPOSE:To inexpensively produce a core for a magnetic head having high reliability by forming an etching mask in such a manner that the boundary lines of the patterns of said mask are included within the crystal plane of the specific orientation of a ferrite single crystal at the time of forming patterns of a recessed form on the surface of the ferrite single crystal. CONSTITUTION:The mask 15 which applies the patterns to the surface of the ferrite single crystal in such a manner that the boundary lines 19 of the patterns in the recessed form are included with the (100) face or (110) face perpendicular to the surface of the ferrite single crystal at the time of forming said patterns on the surface of the ferrite single crystal and thereafter, the mask is chemically etched by bringing the same into contact with an aq. soln. essentially consisting of phosphoric acid contg. at least 20wt.% water. The etched recesses having sloped wall surfaces 18 along the boundary lines 19 of the patterns are thereby formed on the surface formed with the mask of the above-mentioned ferrite single crystal.

Inventors

• 👤 Fuminori Takeya
• 👤 Motoichiro Matsuzawa
• 👤 Hachiyo Akai

Bibliographic Details