DNA Biopolymer Memory with Metal Nanoparticles
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Solution Overview
Problem
Existing inorganic semiconductor memory devices face issues of high power consumption, overheating, and expensive production costs, while organic memory devices with single organic material layers struggle to achieve standard memory requirements due to difficulties in forming conductive layers and maintaining unit characteristics.
Innovation Solution
A memory device with a double helix biopolymer layer, comprising a substrate, a first electrode, a double helix biopolymer layer with distributed metal nanoparticles, and a second electrode, where the biopolymer layer is formed using DNA or RNA biopolymers, surfactants, and metal salts, allowing for the reduction of metal salts to nanoparticles upon illumination, enabling high and low conductivity states for data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic semiconductor materials are used to fabricate memory devices, then the memory devices can store information reliably, but the production cost is very expensive and power consumption is high
Solution Approach 1:
The patent changes the material parameter from inorganic semiconductor to organic material (DNA biopolymer), which fundamentally alters the fabrication process and cost structure. Organic materials can be processed using solution-based methods rather than expensive semiconductor fabrication processes, directly addressing the production cost issue while maintaining memory functionality
Solution Approach 2:
The patent creates a composite structure by incorporating metal nanoparticles into the DNA biopolymer layer. This composite approach combines the low-cost, biodegradable properties of organic materials with the conductive properties of metal nanoparticles, enabling both cost reduction and functional performance
2Ease of manufacture
If a single organic material layer is used to form memory devices, then the production cost is reduced, but it is difficult to form conductive layers and maintain unit characteristics
Solution Approach 1:
The patent incorporates metal nanoparticles (such as silver or gold nanoparticles) into the DNA biopolymer layer to create a composite material. The metal nanoparticles provide the necessary conductive pathways within the organic matrix, solving the problem of forming conductive layers in single-organic-material memory devices while maintaining the cost advantage of organic materials
Solution Approach 2:
The patent introduces metal nanoparticles at specific locations within the DNA biopolymer layer to create localized conductive regions. This local quality enhancement allows conductive pathways to be formed only where needed, maintaining unit characteristics and enabling precise memory functionality without requiring the entire layer to be conductive
3Manufacturing precision
If metal nanoparticles are distributed in organic material layer, then conductive layers can be formed, but the distributions of unit characteristics would be worse because the distances of those conductive nanoparticles are too far
Solution Approach 1:
The patent optimizes the concentration and size parameters of metal nanoparticles within the DNA biopolymer layer. By carefully controlling the nanoparticle density and distribution spacing, the patent achieves optimal conductive pathways while maintaining uniform unit characteristics across the memory device
Solution Approach 2:
The patent creates localized clusters of metal nanoparticles within the DNA biopolymer layer, ensuring that conductive regions are densely packed in specific areas rather than uniformly distributed. This local concentration approach improves conductivity while maintaining stable unit characteristics by ensuring sufficient nanoparticle density within each functional unit
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 memory device achieves reduced production costs, improved storage density, and enhanced reliability compared to inorganic semiconductor devices, with the ability to generate high and low conductivity states for effective data storage and retrieval.
Implementation Method 1
When illuminating (i.e. UV light), the memory device would generate low conductivity state and high conductivity state for writing data
Data Source
AI summary
The present invention relates to a write-once and read-many-times memory device and the fabricating method thereof. The structure of the memory device comprises: a substrate, a first electrode, a double helix biopolymer layer and a second electrode, and a plurality of metal nanoparticles are distributed in the double helix biopolymer layer. The first electrode is disposed on the substrate, the double helix biopolymer layer is disposed on the first electrode and the substrate, and the second electrode is disposed on the double helix biopolymer layer. When illuminating, the memory device will produce a low-conductivity state and high-conductivity state for writing data. Later, when a voltage is applied to the first electrode and the second electrode, the data will be read.