Dynamic magnetic information storage or retrieval – Record copying – Contact transfer
Reexamination Certificate
2007-05-15
2007-05-15
Korzuch, William (Department: 2627)
Dynamic magnetic information storage or retrieval
Record copying
Contact transfer
Reexamination Certificate
active
10453565
ABSTRACT:
An apparatus for performing contact printing of a magnetic transition pattern in a magnetic recording medium, comprising:(a) a stamper/imprinter including a body formed of at least one magnetic material having a high saturation magnetization Bsatand a high permeability, including an imprinting surface adapted to be placed in intimate contact with a surface of a magnetic layer, the imprinting surface comprised of a plurality of patterned areas which separate a plurality of areas which are not patterned, each of the areas which is not patterned being provided with at least one of:(i) mechanical reinforcing means for preventing deformation of the body when the imprinting surface is urged into contact with the surface of the magnetic layer; and(ii) gas venting means for facilitating removal of air or other gas from between the imprinting surface and the surface of the magnetic layer when the former is urged into contact with the latter.
REFERENCES:
patent: 5991104 (1999-11-01), Bonyhard
patent: 6714367 (2004-03-01), Ishida et al.
patent: 6798590 (2004-09-01), Albrecht et al.
patent: 2002/0051307 (2002-05-01), Nishikawa et al.
Kuo et al., Patterning of Magnetic Media via Contact Printing with High Saturation Magnetization, High Permeability Stamper, U.S. Appl. No. 10/082,178, filed Feb. 26, 2002.
Deeman Neil
Leigh Joseph
Wago Koichi
Wang Li-Ping
Korzuch William
McDermott Will & Emery LLP
Negrón Daniel L.
Seagate Technology LLC
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