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:
Oct. 26, 1999
Filed:
May. 21, 1997
Lawrence G Neumann, Leominster, MA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A data transducer, process for fabricating the same and method for writing data to a magnetic storage media, such as magnetic tape, utilizing the bottom (or lower) pole as the trailing edge of a write head. This lower trailing edge pole may be formed of sputtered material such as FeN or FeN-based alloys (which are particularly sensitive to the topography over which they are deposited) since it can be formed on the substantially planar substrate instead of overlying the write coil and its associated insulation layers. Moreover, the bottom pole can be processed using faster and less expensive wet-etching techniques because its width and edge-contours are not critical dimensions which determine recording characteristics. Utilizing the relatively wider and more planar bottom pole as the trailing edge of the write head results in a straighter magnetic transition on the media without the curved edges associated with the fringe fields at the edges of the narrower top pole.