A thin film magnetic head comprising a substrate on which are successively formed a base layer, a lower magnetic film, a gap layer, an insulator layer, a conductor coil, an upper magnetic film, and a first mask, is manufactured by a method in which one or more of a gas which can be expressed by the general...http://www.google.com/patents/US5316617?utm_source=gb-gplus-sharePatent US5316617 - Thin film magnetic head and method of manufacturing the same
