Offset Resin Layer Ends for Multi-Layer Recording Media
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Solution Overview
Problem
The existing methods for manufacturing multi-layer information recording media face challenges in achieving high productivity due to adhesion and delamination issues during the peeling process of resin layers, leading to defects and lower recording capacity.
Innovation Solution
A multi-layer information recording medium is designed with resin layers having offset ends on the inner circumference, where at least one end is covered by another resin layer, and a method involving radiation-curing resin application and peeling techniques to distribute the peeling force evenly, reducing defects and improving layer separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resin layers are formed with ends at the same position on the inner circumference, then the manufacturing process is simple, but adhesion and delamination occur during peeling leading to defects
Solution Approach 1:
The patent applies asymmetry by offsetting the positions of resin layer ends relative to each other. Specifically, the end of a lower resin layer is positioned differently from the end of the upper resin layer, creating an asymmetric configuration that prevents simultaneous peeling at the same location. This asymmetric design eliminates the delamination problem while maintaining manufacturing simplicity.
2Reliability
If resin layers are formed with offset ends to prevent delamination, then adhesion stability improves, but manufacturing complexity increases
Solution Approach 1:
The patent segments the resin layers into distinct upper and lower layers with independently controllable end positions. By treating each resin layer as a separate entity with its own end position, the system can prevent delamination without requiring complex integrated designs. The segmentation allows simple offset positioning that achieves reliability without overall system complexity.
3Quantity of substance
If multiple resin layers are formed sequentially, then recording capacity increases, but peeling defects occur at each layer
Solution Approach 1:
The patent implements periodic action by alternating the end positions of resin layers in a sequential formation process. As each resin layer is formed, its end position is offset relative to the previous layer, creating a periodic pattern that prevents cumulative peeling defects. This periodic offset configuration allows multiple layers to be formed while maintaining peeling quality throughout the entire stack.
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
This approach stabilizes the manufacturing process, reduces defects, and enables the production of multi-layer media with higher recording capacity and improved peeling efficiency.
Implementation Method 1
irradiating the resin with ultraviolet light to cure the resin
Data Source
AI summary
A multi-layer information recording medium comprising a substrate that has an inner circumference and an outer circumference, three or more information recording layers and resin layers disposed between the information recording layers, wherein positions of the ends on the inner circumference side of the resin layers are different from each other in at least one combination of two neighboring resin layers, and the end on the inner circumference side of at least one of the resin layers is covered by another resin layer.