Recording medium

Details Recording medium Recording medium

1998-09-18

2000-04-04

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 644, 428698, 428702, 428913, 43027012, 4304951, 430945, 367283, 367288, B32B 300

Patent

active

060458895

ABSTRACT:
A recording medium is for recording information by varying optical characteristic thereof by application of an external energy thereto, and includes a first substance and a second substance. When the external energy is applied to the recording medium, the first and second substances react with each other to form a third substance having a tungsten-bronze crystalline structure, thereby varying the optical characteristic. The third substance absorbs the external energy and varies the reflectivity of the external energy. Thus, the recording medium records information thereon. The recording medium is good in environmental resistance and information retention, because the third substance is stable energetically.

REFERENCES:
patent: 5371729 (1994-12-01), Yamamoto et al.

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