Double-sided high-density information storage medium

Details Double-sided high-density information storage medium Double-sided high-density information storage medium

2005-02-15

2005-02-15

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110

Reexamination Certificate

active

06855391

ABSTRACT:
A double-sided high-density information storage medium uses a laser pickup head with blue light and light of a shorter wavelength to read and save data in order to increase the data storage per unit area on the information storage medium. The invention further uses a double-sided high-density information storage medium and a double-sided recording stack structure to increase the storage capacity, forming a double-sided two-recording-layer and double-sided four-recording-layer information storage media.

REFERENCES:
patent: 5059473 (1991-10-01), Takahashi et al.
patent: 5392262 (1995-02-01), Finkelstein et al.
patent: 6023451 (2000-02-01), Kashiwagi et al.
patent: 6159572 (2000-12-01), Kobayashi et al.
patent: 6291047 (2001-09-01), Kobayashi et al.
patent: 20030026935 (2003-02-01), Lee et al.

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