Patents Assigned to Matsushita-Kotobukie Electronics Industries, Ltd.
  • Patent number: 6141183
    Abstract: A pole-trimmed writer for an MR read/write data transducer which may be produced without significant re-deposition of Al.sub.2 O.sub.3 or NiFe on the sides of the writer poles. The process disclosed herein advantageously provides an upper (top) pole which is processed to project a pair of relatively thin, laterally extending lower flanges, prior to the use of the upper pole as a mask to subsequent ion milling of the lower pole, or shared shield. In a preferred embodiment, the process for producing the flange is implemented in conjunction with the deposition of a single copper (Cu) or dual Al.sub.2 O.sub.3 and chromium (Cr) overlayers formed on the upper pole seed layer followed by the top pole formation and selective removal of a predetermined amount of the underlying portions of the gap material prior to a subsequent ion milling operation and further processing of the read/write head.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: October 31, 2000
    Assignee: Matsushita-Kotobukie Electronics Industries, Ltd.
    Inventors: Andrew L. Wu, Paul Duval, Thomas Ferraguto
  • Patent number: 6105238
    Abstract: A head structure for writing data on a magnetic media including a first pole having an upper surface and a write gap covering a portion of the upper surface. An upper pole tip formed on the write gap having a first width. A second pole having a second width greater than the first width and coupling to an upper surface of the upper pole tip. A conductive coil magnetically coupled to the first pole and the second pole to induce magnetic flux within the first and second pole in response to a current flowing in the coil.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: August 22, 2000
    Assignee: Matsushita-Kotobukie Electronics Industries, Ltd.
    Inventors: Robert Chesnutt, Charles Partee, Pierre Asselin, John Biesecker, John Fleming, Mike Jennison, Francis Campos, Steve Sanders