Kenyon & Kenyon
Method for producing thin film magnetic head
 A lower magnetic film, a magnetic gap layer, a conductor coil, an insulating layer for electrically insulating the conductor coil, an upper magnetic film and a protective film are laminated on a substrate. Formation data of a lamination step are collected. An optimum value of a magnetic gap depth G of the magnetic gap layer is calculated on the basis of the formation data. The magnetic gap depth is machined to the optimum value on the basis of the optimum value so calculated. 
Hitachi, Ltd.
G G Y G Y
G11B G11B Y10T G11B Y10T
inventional additional additional inventional additional
Yukihiro Makoto Akio Kazuyoshi Masato
Isono Saito Takakura Adachi Yumoto