Method of making magnetic head sliders
Patent 4624048 Issued on November 25, 1986. Estimated Expiration Date: 
August 6, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 6, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for manufacturing a floating type thin film magnetic head Method of manufacturing thin film magnetic head/slider combination Patent #: 4333229 InventorsAssigneeApplicationNo. 06/638314 filed on 08/06/1984US Classes:29/603.12, With significant slider/housing shaping or treating216/102, Metal is elemental aluminum, an alloy, or compound thereof216/22, FORMING OR TREATING ARTICLE CONTAINING MAGNETICALLY RESPONSIVE MATERIAL216/51, Mask resist contains inorganic material216/52, MECHANICALLY SHAPING, DEFORMING, OR ABRADING OF SUBSTRATE29/603.14, Plural magnetic deposition layers360/235.2Rail materialExaminersPrimary: Hall, Carl E.Attorney, Agent or FirmInternational ClassesG11B 5/10 (20060101)G11B 5/187 (20060101) G11B 5/31 (20060101) G11B 5/60 (20060101) Foreign Application Priority Data1983-08-17 DEAbstractFor making rails in workpieces for magnetic head sliders for sensors of magnetizable media, anodic oxidation of highly pure aluminum substrates is applied. For that purpose, the respective surface of the substrates is covered with a mask cover which leaves uncovered the zones in the substrate surface area which are intended for the forming of rails. By means of anodic oxidation of the aluminum in the exposed regions, rail layer regions of oxide are formed which after the removal of the mask cover can themselves be used as an etching mask in order to provide a recessed region between two respective rails by means of chemical wet etching. | |
