Patents Examined by David O. Ometz
  • Thin film magnetic head using Al-Si-O insulating material and method of manufacturing the same
    Patent number: 6704172
    Abstract: A thin film magnetic head includes a lower gap layer and/or an upper gap layer made of an AlSiO film having a Si content of 2 at % to 9 at % of the total or an AlSiON film further having a N content of 2 at % to 10 at %. Therefore, the insulation performance, developer resistance, smoothness and heat radiation property of the gap layer can be improved as compared with a gap layer made of Al2O3.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: March 9, 2004
    Assignee: Alps Electric Co., Ltd.
    Inventors: Yoshihiro Nishiyama, Yasuo Hayakawa