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:
Jun. 04, 2002
Filed:
Nov. 09, 1999
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
To provide a thin film magnetic head having an upper core layer whose dimensions are controlled with high precision, which can yield high density recording on a magnetic recording medium, and a production process of the same, an upper core layer is formed on a first, second and third insulation layers and a gap layer, and has a narrow tip region, a connecting portion and a body portion, in which the tip region is connected via the gap layer to a lower core layer on a head surface facing a magnetic recording medium, the connecting portion is connected to the tip region in a nearly identical width, and is formed on a lower region of a first sloping region and an inclined plane K, and the body portion extends wider from the connecting portion and covers part of a coil layer. In a thin film magnetic head having a dual coil layer structure, a third insulation layer having a third apex and a third sloping region is formed to cover a second coil layer, and the third apex is located on a second plane region, and the top of a second insulation layer and the third sloping region establish a first pocket region P