890results about "Heads with metal sheet cores" patented technology

A method of making a perpendicular magnetic recording head for use in a data storage device includes forming a first pole layer, a second pole layer, a third pole layer, and a shield layer of a write section. The first pole layer, second pole layer, third pole layer, and shield layer are formed without using a chemical mechanical polishing process. The method next includes concurrently trimming the shield layer and a write pole that is defined by the third pole layer to a predetermined track width. In the trimming step, the shield layer is used as a mask for the write pole.

A magnetic head for perpendicular magnetic recording includes a slider having an air bearing surface (ABS) and a trailing surface and a transducer fabricated on the trailing surface. The transducer includes a magnetoresistive (MR) read element disposed within a gap material bounded by shield material, an adjunct pole, and a main pole formed in an adjacent layered relationship to the adjunct pole. The adjunct pole has a front edge that is recessed from the ABS and a rear edge. The main pole has a write tip that extends approximately to the ABS. The transducer further includes a write coil having a first layer of turns below the adjunct pole and above the shield material. The magnetic head also includes a heating element with a portion of the heating element below the write coil and behind the rear edge of the adjunct pole.

The present invention provides a thin film write head having an upper and lower pole structures and conductor turns forming a winding for generating magnetic flux. The conductor is formed with a non-planar top surface. The winding of the present invention may be formed of lower and upper turns. The upper turns may be formed with a non-planar top surface, a non-planar bottom surface, or both. It is preferred that the bottom surface of the upper conductor turns be coherent with the non-planar top surface of the lower conductor turns. The non-planar top surface may be formed by removing corners formed during deposition between a generally planar top surface and abutting side walls. The corners may be removed by ion milling to form the non-planar top surface. The conductor may be copper with the non-planar top surface having sloping facets. The thin film write head of the present invention may be utilized to provide an improved data storage and retrieval apparatus. The preferred embodiment provides reduced coil resistance thereby reducing Johnson Thermal Noise and power dissipation. It also allows for reduced yoke length and reduced stack height while providing low apex angles to expand and improve yoke material deposition thereby improving head response and operational frequency.

A read / write head and method of making the same are used in a data storage system, such as a disk drive, for perpendicular magnetic recording of data. The head employs a two-layer pole design with a main pole made of sputtered high moment magnetic material, and an adjunct pole made of electroplated soft magnetic film. The main pole is used to write data onto the medium, and is formed over the write coil. The adjunct pole is substantially recessed from the air bearing surface and is formed over the main pole. The present head design significantly enhances the magnetic write field, and substantially reduces side-writing that result in accidental erasure of data in adjacent tracks on the magnetic recording medium.

The present invention provides an improved thin film write head and method of fabrication capable of providing an ultra-short yoke and / or an ultra-low conductor winding stack. The present invention reduces yoke length and stack height by forming the conductor winding in a trench etched from an insulation layer, preferably formed of an inorganic insulation material. A thin resist mask is used to define the width of the trench while the etch process defines the depth. Preferably, the insulation layer is formed on a different inorganic insulation material to control the etch process, thus, the conductor winding may be formed on the underlying layer. The conductor winding preferably is formed by depositing conductor material so that it fills the trench and then planarizing, such as by chemical mechanical polish, to remove conductor material deposited outside the trench. An organic insulation layer, such as cured photoresist, may be deposited on the planarized surface of the conductor winding to insulate it from an overlying yoke. This overlying organic insulation layer may also define the apex angle of the head. The present invention may have multiple layers of conductor winding. The subsequent layers of conductor may be formed similar to the first layer, or may be formed with conventional photoresist processes and structures. The present invention may utilize any known pole structure or material.

A magnetic recording transducer includes a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS). The magnetic recording transducer further includes at least one coil having a coil front distal from the ABS, and at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front.