Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1991-12-17
1995-02-21
Ryan, Patrick J.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 65, 428457, 428913, 430270, 430945, 346 76L, 3461351, 346264, B32B 300
Patent
active
053914139
ABSTRACT:
A recordable optical recording medium having sufficiently high reflectance and modulation factor to insure consistent reproduction on CD players. The optical recording medium of the present invention has a light-transparent substrate having pregrooves formed in the face of one surface, a light-absorbing layer formed on the pregrooves, a light-reflecting layer formed on said light-absorbing layer, wherein the pregrooves have a depth of .lambda./6.5 n-.lambda./2.5 n (where .lambda. is the wavelength of recording or reproducing light in nanometers, and n is the refractive index of the substrate) and a width of 0.35-0.47 .mu.m.
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Araki Yasushi
Chuman Takashi
Matsui Fumio
Sakai Tatsuro
Tanaka Satoru
Evans Elizabeth
Pioneer Electronic Corporation
Ryan Patrick J.
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