The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 1983
Filed:
Aug. 04, 1982
Yuji Omata, Ibaraki, JP;
Nobuyuki Kaminaka, Neyagawa, JP;
Kenji Kanai, Neyagawa, JP;
Noboru Nomura, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The invention provides a method for manufacturing a thin film magnetic head with a low step structure having a first nonmagnetic insulating layer, a lower magnetic layer, a nonmagnetic insulating layer of a thickness corresponding to a gap length, a second nonmagnetic insulating layer, a conductive layer which constitutes a coil, a third nonmagnetic insulating layer, and an upper magnetic layer, each of which is sequentially formed on a nonmagnetic conductive substrate in the order named. A conductive layer is formed in a recess whose bottom surface corresponds to an exposed upper surface of the nonmagnetic conductive substrate and which is formed in a predetermined portion of the first nonmagnetic insulating layer formed on the nonmagnetic conductive substrate. Thereafter, electroplating is performed to form a yoke portion of the lower magnetic layer in the recess by applying a voltage to the conductive layer as an electrode through the nonmagnetic conductive substrate. Further, a magnetic layer of a predetermined thickness is formed on the yoke portion and in its vicinity to increase the thickness of the yoke.