Method and device for forming optical or magnetic memory...

Details Method and device for forming optical or magnetic memory... Method and device for forming optical or magnetic memory...

2003-04-24

2008-12-23

Kim, Peter B (Department: 2851)

Photocopying

Projection printing and copying cameras

Methods

C355S072000, C369S275400

Reexamination Certificate

active

07468784

ABSTRACT:
A method and device for forming an optical or magnetic memory medium or a template for making such memory media, including suspending an essentially flat substrate rotatably about an axis, arranging a particle beam source to expose the surface layer to a particle beam, rotating the substrate such that the particle beam forms a groove in the surface layer by exposure to a predetermined degree, which groove has a width on the order of 1-100 nm, and controlling the position of the particle beam and the axis relative to each other, during rotation of the substrate about the axis so that part of the groove is subjected to more than one exposure to the particle beam, whereby the groove is formed as a sum of said more than one exposure, which sum corresponds to said predetermined degree of exposure.

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“First Examination Report” from the Indian Patent Office, dated Dec. 14, 2006, in corresponding application No. 3043/DELNP/2004 (2 pages).
European Patent Office communication, dated Mar. 22, 2007, in Application 03 721 234.7 (4 pages).

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