Optical recording medium and compound used for the same
First Claim
1. An optical recording medium containing at least one recording layer (A) capable of recording and playback with a laser light, wherein said recording layer (A) contains at least one kind of organic compound, wherein the percentage change (|[a2−
- a1]/a1|×
100) of the recording layer thickness (a2) at the recorded site of said recording layer (A) after recorded with a laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is less than 25%, and the amount of change (|a2−
a1|) of the recording layer thickness (a2) at recorded site of said recording layer (A) after recorded with laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is less than 15 nm.
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Accused Products
Abstract
An optical recording medium wherein the percentage change (|[a2−a1]/a1|×100) of the recording layer thickness (a2) at the recorded site of recording layer (A) after recorded with laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is less than 25% and the amount of change (|a2−a1|) of the recording layer thickness (a2) at recorded site of said recording layer (A) after recorded with laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is controlled to be less than 15 nm. The optical recording medium can enable recording and playback with high quality using laser of 300 nm to 900 nm. Also provided is a compound comprising a six-membered ring structure composed of four carbon atoms and two nitrogen atoms and a bonded substituted or unsubstituted amino group.
18 Citations
24 Claims
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1. An optical recording medium containing at least one recording layer (A) capable of recording and playback with a laser light, wherein said recording layer (A) contains at least one kind of organic compound,
wherein the percentage change (|[a2− - a1]/a1|×
100) of the recording layer thickness (a2) at the recorded site of said recording layer (A) after recorded with a laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is less than 25%, and the amount of change (|a2−
a1|) of the recording layer thickness (a2) at recorded site of said recording layer (A) after recorded with laser light compared with the recording layer thickness (a1) at unrecorded site of said recording layer (A) is less than 15 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 23, 24)
- a1]/a1|×
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18. A compound represented by general formula (5)
(wherein each of R26-R35 represents independently a hydrogen atom or a substituent; - and in a combination among R26-R30 and a combination among R31-R35, each substituent within each combination may independently bond via a linkage group to form a ring structure together with the carbon atom and/or nitrogen atom to which it bonds).
- View Dependent Claims (21)
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19. A quinazolin-4-one compound represented by general formula (6) having a disubstituted amino group at any of positions 5-8 in the quinazoline-4-ring:
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(wherein each of R36-R41 represents independently a hydrogen atom or a substituent). - View Dependent Claims (20)
(wherein R36-R41 represent the same group as R36-R41 in formula (6); and
Z1 and Z2 represent a leaving group).
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22. An optical recording medium comprising a recording layer (A) capable of recording/playback with a laser light on a substrate, wherein the recording layer (A) contains at least one kind of organic compound, wherein recording can be carried out by heat generated on irradiation of said recording layer (A) with recording laser light of 6 mW or lower and/or by the laser light without giving mechanical deformation to the substrate.
Specification