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US 7,464,458 B2Granted
Method for manufacturing a self-aligned, notched trailing shield for perpendicular recording
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsQuang Le, Aron Pentek
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Abstract
A perpendicular magnetic write head having a notched, self aligned trailing shield for canting a magnetic field emitted therefrom.
Claims6
A method for constructing a write head for perpendicular magnetic recording, comprising:
- depositing a layer of write pole material;
- depositing a non-magnetic write gap material over said write pole material;
- forming a magnetic shield pedestal over said write gap material layer, said shield pedestal having first and second lateral sides defining planes perpendicular to an air bearing surface;
- and
- performing a material removal process to remove selected portions of said write gap layer and said write pole material using said shield pedestal as a mask to prevent removal of said write gap material and said write pole material disposed beneath said shield pedestal;
- wherein a distance between said first and second lateral sides of said shield pedestal defines a track width and wherein said shield pedestal has a depth in a direction perpendicular to said air bearing surface that is less than said track width.
3 more elements
A method for constructing a write head for perpendicular magnetic recording, comprising:
- depositing a layer of write pole material;
- depositing a non-magnetic write gap material over said write pole material;
- forming a magnetic shield pedestal over said write gap material layer, said shield pedestal having first and second lateral sides defining planes perpendicular to an air bearing surface;
- and
- performing a material removal process to remove selected portions of said write gap layer and said write pole material using said shield pedestal as a mask to prevent removal of said write gap material and said write pole material disposed beneath said shield pedestal;
- wherein said shield pedestal is constructed of a laminated magnetic layers.
3 more elements
A method for constructing a write head for perpendicular magnetic recording, comprising:
- depositing a layer of write pole material;
- depositing a non-magnetic write gap material over said write pole material;
- forming a magnetic shield pedestal over said write gap material layer, said shield pedestal having first and second lateral sides defining planes perpendicular to an air bearing surface;
- performing a material removal process to remove selected portions of said write gap layer and said write pole material using said shield pedestal as a mask to prevent removal of said write gap material and said write pole material disposed beneath said shield pedestal;
- and
- depositing a magnetic main shield portion over said shield pedestal;
- and
- performing a second material removal process, using said magnetic main shield material as a mask to remove selected portions of said shield pedestal to define a throat height of said shield pedestal, said throat height being a dimension measured from said air bearing surface.
5 more elements
Dependencies are inferred from the claim text.