Optical recording medium

Details Optical recording medium Optical recording medium

2005-06-21

2005-06-21

Hess, Bruce H. (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064200, C428S065100, C369S275100

Reexamination Certificate

active

06908655

ABSTRACT:
A disc-shaped recording medium having transcription characteristics for fine signals simultaneously with resonance characteristics and stiffness which are characteristics contrary to the transcription characteristics. At least a recording layer and a light transmitting layer are sequentially formed on a substrate and light is illuminated from a light transmitting layer side to record and/or reproduce information signals. The substrate includes a core layer formed of a resin composition comprised of a mixture of two or more resin sorts. The resin composition has tanδ, as an index indicating the internal loss, equal to not less than 0.015 as a system in its entirety. The resin composition constituting the core layer is a compounded resin of the incompatible system and is of an islands-sea structure.

REFERENCES:
patent: 262502 (1988-04-01), None
patent: 965985 (1999-12-01), None
patent: 144372 (2001-06-01), None
Minister of International Trade and Industry, “Testing method for dynamic mechanical properties of plastics by non-resonant, forced, fixed frequency oscillation”, Japanese Industrial Standard, Edition 1, K 7198—Oct. 2, 1991, pp. 1-11.
Minister of International Trade and Industry, “Testing method for dynamic mechanical properties of plastics by non-resonant, forced, fixed frequency oscillation”, Japanese Industrial Standard, Edition 1, K 7198—Oct. 2, 1991, pp. 1-11, Japanese version.
International Standard 6721-1:2001, “Plastics—Determination of dynamic mechanical properties”, Part 1: General Principles, Second Edition, May 15, 2001, pp. 1-20.
International Standard 6721-2:1994, “Plastics—Determination of dynamic mechanical properties”, Part 2:Torsion-pendulum method, First Edition, Nov. 1, 1994, pp. 1-12.
International Standard 6721-3:1994, “Plastics—Determination of dynamic mechanical properties”, Part 3:Flexural-vibration—resonance-curve method, First Edition, Nov. 1, 1994, pp. 1-10.
International Standard 6721-4:1994, “Plastics—Determination of dynamic mechanical properties”, Part 4:Tensile-vibration—Non-resonance method, First Edition, Nov. 1, 1994, pp. 1-6.
International Standard 6721-5:1996, “Plastics—Determination of dynamic mechanical properties”, Part 5:Flexural-vibration—Non-resonance method, First Edition, May 15, 1996, pp. 1-8.
International Standard 6721-6:1996, “Plastics—Determination of dynamic mechanical properties”, Part 6:Shear vibration—Non-resonance method, First Edition, May 15, 1996, pp. 1-7.
International Standard 6721-7:1996, “Plastics—Determination of dynamic mechanical properties”, Part 7:Torsional vibration—Non-resonance method, First Edition, Jun. 1, 1996, pp. 1-7.
International Standard 6721-8:1997, “Plastics—Determination of dynamic mechanical properties”, Part 8:Longitudinal and shear vibration—Wave propagation method, First Edition, Jun. 1, 1997, pp. 1-17.
International Standard 6721-9:1997, “Plastics—Determination of dynamic mechanical properties”, Part 9:Tensile vibration—Sonic-pulse propagation method, First Edition, Jun. 1, 1997, pp. 1-7.
International Standard 6721-10:1999, “Plastics—Determination of dynamic mechanical properties”, Part 10:Complex shear viscosity using a parallel-plate oscillatory rheometer, Second Edition, Dec. 15, 1999, pp. 1-15.

Affiliated with

Also associated with

Rating

Optical recording medium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical recording medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3505723