Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
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.
Fukano Tatsuo
Kato Naohiko
Motohiro Tomoyoshi
Takeda Yasuhiko
Evans Elizabeth
Kabushiki Kaisha Toyota Chuo Kenkyusho
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