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US 2007/0178271 A1Published application
Optical recording medium
OwnerMakarand Goreinventor
Life of this patent
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Abstract
Systems and method for optically recording data. One method comprises providing an optical recording medium comprising a substrate coated with a markable coating, said markable coating comprising a matrix and a color-forming agent comprising a leuco dye and developer, and using energy having a predetermined wavelength to form an optically detectable mark in the markable coating, the mark having a size less than 0.90 μm.
Claims20
A method for optically recording data, comprising:
- a) providing an optical recording medium comprising a substrate coated with a markable coating, said markable coating comprising:
- a matrix;
- a color-forming agent comprising a leuco dye and developer each included in the matrix;
- and
- b) using energy having a predetermined wavelength to form an optically detectable mark in the markable coating, the mark having a size less than 0.90 μm.
2 more elements
A method for optically recording data, comprising:
- a) providing an optical recording medium comprising a substrate coated with a markable coating comprising a dye;
- and
- b) using light at a predetermined wavelength to cause an optical change in the markable coating;
- wherein said markable coating changes from relatively low absorbance of radiation at the predetermined wavelength to relatively high absorbance of radiation at the predetermined wavelength when activated by the application of energy above a threshold level so as to form an optically detectable mark.
1 more element
An optical recording medium comprising:
- a substrate;
- a markable coating on said substrate;
- said markable coating having a thickness less than 1 μm and comprising:
- a matrix;
- a color-forming agent included in the matrix and comprising a leuco dye and developer;
- and
- wherein said leuco dye is selected to change from high reflectance of radiation with wavelengths between 400 and 500 nm to low reflectance of radiation with wavelengths between 400 and 500 nm when activated by the application of energy above a threshold level.
4 more elements
Dependencies are inferred from the claim text.