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:
Jul. 04, 1995
Filed:
Aug. 31, 1993
Makoto Wakasugi, Tokorozawa, JP;
Citizen Watch Co., Inc., Tokyo, JP;
Abstract
In a method of manufacturing a tunnel erase type combined magnetic head core using a first core member having a predetermined pole height dimension defined by a surface on a magnetic gap formation side and an apex, and a predetermined back height dimension defined by the apex and a bottom of a coil core into which a coil is inserted, and a second core member, the bottom of the coil core of the first core member is used as a back height reference face and the combined magnetic head core is manufactured with the back height reference face as reference, thereby facilitating processing of a surface on the pole height side at intermediate steps, namely, a final contact face with which magnetic recording media are brought into contact. Since the back height reference face is used as reference, when combined core chips are incorporated into sliders to manufacture magnetic heads, the process is not affected by variations in core dimensions.