Abstract: A magnetic head includes a first pole piece; a second pole piece; a pedestal formed over a central portion of the first pole piece; a gap separating the pedestal from the second pole piece; and at least one of a top straight walled portion over the pedestal and a bottom straight-walled portion underneath the pedestal, the pedestal being notched with angled side walls.

Abstract: Two trim/notch milling steps are used to refine the track width that is defined by the second pole piece tip of a write head. The second milling step uses feedback gained after the first milling step to refine the P2B (pole P2 bottom width) dimension. A final milling step may be conducted after receiving feedback from the result of the second trim/notch milling step.

Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.

Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.

Abstract: Methods for creating a write head by forming a bump after the top pole is formed are provided. In one embodiment, a bottom pole is created out of a first layer. A non-magnetic gap material is applied to the surface of the wafer. A top pole is created out of a second layer. After creating the top pole, a bump is created. The bump is used to protect at least a portion of the first layer while etching to create a stray flux absorber.

Abstract: First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width that defines a track width of the write head. The third pole tip component is formed with top and bottom surfaces wherein the bottom surface interfaces a top surface of the second pole tip component and has a width equal to the track width and wherein the top surface of the third pole tip has a width greater than the track width.

Abstract: In one illustrative example, a method for use in making a magnetic write head includes the steps of forming a first pole piece layer of a first pole piece; forming a patterned resist over the first pole piece layer; electroplating a pedestal over the first pole piece layer within a channel of the patterned resist; electroplating a metal gap layer over the pedestal within the channel of the patterned resist; forming a resist channel shrinking film over the patterned resist; baking the resist channel shrinking film over the patterned to thereby reduce a width of the channel; removing the resist channel shrinking film; electroplating a second pole piece within the reduced-width channel of the patterned resist; removing the patterned resist; and milling the pedestal, using the second pole piece as a mask, to form a central notched pedestal having side walls with angled slopes.

Abstract: A method for forming a high aspect ratio magnetic structure in a magnetic write head using a combination of chemical mechanical polishing and reactive ion etching.

Abstract: A method for fabrication of magnetic write heads for disk drives in which a P1 layer is formed having a P1 Protrusion, the P1 Protrusion having a longitudinal reference axis. A gap layer is deposited on the P1 Protrusion and a layer of fill material is deposited on the gap layer. The fill material layer is shaped to form a mold which surrounds a hollow which is aligned with the longitudinal axis of the P1 Protrusion. This hollow in the fill material layer is filled with P2 pole material to form a P2 pole which is then automatically substantially aligned with the longitudinal axis of the P1 Protrusion.

Abstract: A pedestal is formed over a first pole piece layer and insulator materials are formed to surround it. A gap layer made of a non-magnetic insulator or metal is then formed over the pedestal and the insulator, followed by the optional formation of a seed layer. A second pole piece is formed over the gap layer with or without the seed layer by forming a patterned resist using E-beam lithography and electroplating second pole piece materials within the patterned resist. After milling to remove side portions of the gap layer and the optional seed layer, a chemical etch is performed to remove a top portion of the insulator materials. The pedestal is then notched and trimmed by ion milling using the second pole piece as a mask to form a central notched structure. Since the second pole piece is precisely centered over the pedestal prior to notching, the pedestal is notched symmetrically to form a notched structure having side walls with angled slopes.

Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.

Abstract: A method for forming a high aspect ratio magnetic structure in a magnetic write head using a combination of chemical mechanical polishing and reactive ion etching.

Abstract: First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width that defines a track width of the write head. The third pole tip component is formed with top and bottom surfaces wherein the bottom surface interfaces a top surface of the second pole tip component and has a width equal to the track width and wherein the top surface of the third pole tip has a width greater than the track width.

Abstract: A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks.

Abstract: First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width that defines a track width of the write head. The third pole tip component is formed with top and bottom surfaces wherein the bottom surface interfaces a top surface of the second pole tip component and has a width equal to the track width and wherein the top surface of the third pole tip has a width greater than the track width.

Abstract: In the manufacture of a combined magnetic head, milling time for notching a first pole piece of the head's write element is reduced by constructing the first pole piece with a notching layer on a first pole piece layer, the notching layer having first and second corners adjacent first and second side walls of the second pole tip. The first pole piece layer has a wide lateral expanse, and the notching layer has a narrow lateral expanse. The width of the notching layer is preferably 0.2 &mgr;m to 2.0 &mgr;m wider than a target track width of the second pole tip. With this arrangement, the notching layer has first and second side walls that project 0.10 &mgr;m to 1.0 &mgr;m. laterally, beyond first and second side walls, respectively, of the second pole tip. The thickness of the notching layer is preferably between 0.1 &mgr;m to 1.0 &mgr;m. Accordingly, full notching of the notching layer can be achieved by milling a small-corner in a range of 0.10 &mgr;m by 0.10 &mgr;m to 1.0 &mgr;m by 1.

Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.

Abstract: A high throughput method for producing the narrow track width inductive head is also provided, whereby the heads may be manufactured in substantial volumes. The new head may be merged or piggy-backed MR or GMR heads, comprising a first pole piece, P1, and a second pole piece, P2, and is distinctly characterized by write track width is significantly reduced by a preliminary ion milling process before P1 notching is performed. The preliminary step utilizes an ion milling process to trim the write track width, P2B, at an angle between 45 to 85 degrees from the wafer normal. The MR head may then undergo conventional P1 notching.

Abstract: A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks.

Abstract: A single-sided, notched write head is provided for writing narrow erase band servo tracks as well as a double-notched write head, and for writing data tracks better than a double-notched write head. The single-sided, notched write head writes a narrow erase band on the notched side and a wide erase band on the unnotched side. In one embodiment, only one side of the first pole piece layer is notched, and in another embodiment a first side of the first pole piece layer is notched more than a second side. By writing servo tracks only a fraction of the track width of the write head, a wide erase band region is overwritten so that a narrow erase band is on each side of the servo track. Data tracks are written with a narrow erase band on one side and a wide erase band on the other side. The wide erase band on one side of the data track allows more flexibility in spacing the read head from adjacent tracks.