04751779 is referenced by 13 patents and cites 2 patents.

A core for magnetic head, which has a surface roughness of not higher than 2 .mu.m in the side wall of a groove for defining the track width of the core, can be obtained by subjecting at least a portion, which defines the track width, of a gapped bar made of ferrite and having a coil turn hole and a magnetic gap, to a laser-induced etching under a condition that a laser light having a power of 50-1,100 mW and a focused beam diameter of not larger than 20 .mu.m is irradiated to at least the track width-defining portion at a scanning speed of 2-110 .mu.m/sec in a halogen gas- or halide gas-containing atmosphere kept to a gas pressure of 10-200 Torr.

Title
Method of producing a core for magnetic head
Application Number
7/31768
Publication Number
4751779
Application Date
March 30, 1987
Publication Date
June 21, 1988
Inventor
Soji Ohara
Kashihara
JP
Hideto Sandaiji
Kasugai
JP
Mikio Takai
Takarazuka
JP
Shohei Nagatomo
Itami
JP
Agent
Parkhurst & Oliff
Assignee
NGK Insulators
JP
DS Scanner
JP
IPC
G11B 5/42
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