Sapphire Data Storage with Metal Lithography
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Solution Overview
Problem
Existing data storage devices on compact discs suffer from low durability due to materials of low hardness, requiring frequent refreshing and being sensitive to physical and chemical attacks, and are costly and inefficient in terms of space usage.
Innovation Solution
The method involves transferring graphical data onto a transparent medium using a hard, light-permeable material like sapphire, with metal deposits (such as platinum or gold) created through lithography, providing mechanical and chemical resistance, and using a manipulator for easy reading and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymer materials are used for compact disc data storage, then the materials are easy to process and manufacture, but the durability is low and the materials are easily pressed or damaged
Solution Approach 1:
The patent uses a composite structure combining a hard transparent material (such as sapphire, glass, or crystal) as the substrate with a protective transparent coating layer. This composite approach provides both the mechanical hardness needed for durability and the optical transparency required for data reading, resolving the contradiction between ease of manufacture and reliability.
Solution Approach 2:
The patent replaces the traditional polymer-based mechanical data storage system with an optical data storage system using hard transparent materials. The data is stored as optical patterns (transparent/opaque regions) rather than mechanical depressions or projections, eliminating the vulnerability to physical pressing while maintaining manufacturability through established optical fabrication processes.
2Loss of time
If traditional data storage materials are used, then the initial cost may be lower, but frequent refreshing and replacement are required over centuries
Solution Approach 1:
The patent applies a protective transparent coating layer beforehand to cushion and protect the data storage medium from environmental factors such as moisture, chemicals, and physical damage. This preventive protection ensures long-term data preservation without requiring frequent refreshing or replacement, addressing both the time loss and reliability aspects.
Solution Approach 2:
The use of hard transparent materials like sapphire or glass creates an inert environment that is resistant to chemical degradation, moisture, and other environmental factors that would otherwise degrade the data storage medium over centuries. This inert environment ensures permanent data preservation without the need for periodic refreshing.
3Object-affected harmful factors
If known data storage methods are used, then the devices can be manufactured, but they are sensitive to various attacks including physico-chemical attacks
Solution Approach 1:
The patent employs a composite structure with a hard transparent substrate and protective coating that provides resistance to multiple types of attacks including mechanical damage, chemical corrosion, and environmental factors. The hard material resists physical attacks while the protective coating adds chemical resistance, creating a multi-defensive system that maintains reliability.
Solution Approach 2:
The patent converts the potential harm of using hard transparent materials (which may be more difficult to process than polymers) into a benefit by using established optical fabrication techniques and applying protective coatings that enhance durability. The difficulty in processing is offset by the superior resistance to attacks and the availability of mature manufacturing processes for such materials.
4Quantity of substance
If etching is used to store data, then data can be inscribed on the surface, but the space used for etching increases relative to the volume of information
Solution Approach 1:
The patent replaces mechanical etching with optical pattern formation, where data is stored as optical patterns (transparent and opaque regions) created through photolithography or similar optical processes. This substitution allows for higher data density by utilizing the optical properties of the material rather than mechanical removal, reducing the surface area required for the same amount of information storage.
Solution Approach 2:
The patent changes the fundamental parameter of data representation from physical etching depth or surface modification to optical transmission properties. By encoding data in terms of light transmission (transparent vs. opaque regions), the system achieves more efficient use of surface area, as optical patterns can be created with finer precision and higher contrast than mechanical etching, thereby increasing space efficiency.
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 results in a durable, cost-effective, and space-efficient data storage solution with enhanced resistance to mechanical, chemical, and environmental factors, allowing for long-term preservation and easy interpretation of graphical data.
Implementation Method 1
a coherent light beam, such as a light beam formed by a laser
Implementation Method 2
both materials have high light transmission coefficients
Data Source
AI summary
A method of making a data carrier medium comprising a first carrier layer and a graphical inscription on said first carrier layer and constituted, for example, by a text, by a photograph, or by digital data. The method comprises the steps consisting in performing the graphical inscription by depositing at least one metal lithographic deposition of metal on the first carrier layer, in supplying the first carrier layer made of a transparent material, and further in placing a second carrier layer made of a transparent material in superposition on the first carrier layer so as to protect the graphical inscription.