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US 6,658,723 B1Granted
Method for collective production of magnetic heads having a bearing surface with specific height
AssigneeCommissariat a l'Energie Atomique
InventorsJean-Baptiste Albertini, Gérard Barrois
Life of this patent
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Abstract
Process for collective production of integrated magnetic heads with a supporting surface with a determined height. According to the invention the components of a board are thinned collectively be etching the board along area overlapping polar parts.
Claims16
A method process for collective production of integrated magnetic heads, the process comprising:
- making a plurality of components on a board, each component formed into a magnetic head having a supporting surface and comprising first and second polar parts separated by an air gap;
- etching the board in a direction perpendicular to a plane of the board so as to collectively thin the supporting surface of each of the plurality of components at a location adjacent the first and second polar parts to round the supporting surface for each of the plurality of components;
- and
- separating the plurality of components to obtain individual magnetic heads, wherein the board comprises a substrate supporting the components and a superstrate covering said components, and in which the substrate and the superstrate are thinned by etching them to obtain supporting surfaces with a height.
1 more element
A method for collective production of integrated magnetic heads, the method comprising:
- making a plurality of components on a board, each component formed into a magnetic head having a supporting surface and comprising first and second polar parts separated by an air gap;
- etching the board in a direction perpendicular to a plane of the board so as to collectively thin a supporting surface of each of the plurality of components at a location adjacent the first and second polar parts to round the supporting surface, and wherein the height of the supporting surface is less than the thickness of the board;
- and
- separating the plurality of components to obtain individual magnetic heads.
1 more element
Dependencies are inferred from the claim text.