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:
Jan. 04, 1994
Filed:
Dec. 02, 1991
Takeshi Harada, Toride, JP;
Masatoshi Kanamaru, Chiyoda, JP;
Atsushi Hosogane, Chiyoda, JP;
Akiomi Kohno, Tomobe, JP;
Kenji Mori, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A slider unit having a reading or reproducing head, with the head being adapted to float over a surface of an information recording disc. The slider unit includes a slider body having a flying height sensor with float surfaces on an underside thereof to generate a lifting force. A piezoelectrically or electrostatically controlled valve layer may be positioned over a vent communicating between an upper surface of the slider, with the vent opening to a recess for generating a negative lift component at an underside of the slider unit. The slider body is made from a ceramic base portion and includes a semiconductive insert portion of, for example, silicon or a photosensitive glass with an adjustment device being formed by utilization of microfabrication techniques such as deposition and etching.