L-H Organic Dye Recording Material for Blue Laser Optical Disks
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Solution Overview
Problem
Conventional organic dye materials used in optical disks are insufficient for achieving high reproduction durability and stability when used with blue laser beams, particularly in next-generation optical disks requiring higher density and performance.
Innovation Solution
A novel organic dye recording material with a Low to High (L-H) characteristic, which increases the light reflection factor in recorded areas, is developed, allowing for substrate deformation-free recording and improved reproduction reliability through discoloring action due to electron coupling, and optimized for use with wavelengths between 355 nm and 455 nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic dye materials are used in optical disks, then manufacturing cost is reduced, but reproduction durability and stability are insufficient when used with blue laser beams
Solution Approach 1:
The patent changes the chemical parameters of the organic dye material by introducing specific heterocyclic structures (triazine, pyrimidine, pyridine rings) and substituent groups. This modifies the molecular properties to achieve high reproduction durability with blue laser beams while maintaining manufacturability through conventional dye synthesis methods
Solution Approach 2:
The patent creates a composite dye structure by combining heterocyclic core molecules with specific substituent groups containing electron-donating or electron-withdrawing characteristics. This composite molecular design achieves both high reproduction durability and stability with blue laser excitation
2Productivity
If blue laser beam with short wavelength is used for recording and reproduction, then recording density and performance are improved, but conventional organic dye materials cannot achieve sufficient recording and reproducing characteristics
Solution Approach 1:
The patent modifies the optical parameters of the organic dye by designing molecules with specific heterocyclic structures that have appropriate absorption coefficients and excited state lifetimes for blue laser wavelengths (405-488 nm). This enables high-density recording while maintaining reliable reproduction characteristics
Solution Approach 2:
The patent introduces specific functional groups and substituent patterns at particular positions on the heterocyclic ring structure to optimize local electronic properties. This localized molecular design enhances the dye's response to blue laser excitation while maintaining overall molecular stability
3Reliability
If a certain track is continuously reproduced, then signal degradation occurs, but high reproduction durability of 1,000,000 or more continuous reproductions is required
Solution Approach 1:
The patent designs the organic dye molecule with structural features that maintain stable optical properties during continuous reproduction. The heterocyclic core structure with appropriate substituent groups ensures consistent light absorption and reflection characteristics over 1,000,000 or more continuous reproductions without signal degradation
Solution Approach 2:
The patent incorporates stabilizing substituent groups and protective molecular structures in advance to prevent signal degradation during continuous reproduction. These pre-built molecular features cushion against photodegradation and maintain reproduction reliability over extended use
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The L-H organic dye recording material achieves high reproduction durability of 1,000,000 or more continuous reproductions and enhances signal reliability by maintaining a high C/N ratio, ensuring stable recording and playback performance even with repetitive use.
Implementation Method 1
A novel organic dye recording material with a Low to High (L-H) characteristic, which increases the light reflection factor in recorded areas, is developed, allowing for substrate deformation-free recording and improved reproduction reliability through discoloring action due to electron coupling, and optimized for use with wavelengths between 355 nm and 455 nm
Implementation Method 2
improved reproduction reliability through discoloring action due to electron coupling
Data Source
AI summary
According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.