Organic Polymer Film Optical Memory for High-Density Storage
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Solution Overview
Problem
Current memory devices, particularly those based on semiconducting organic polymer films, lack stable and rewritable options for high-density storage, despite advancements in cost efficiency and durability.
Innovation Solution
An optoelectronic memory device utilizing a two-dimensional organic polymer film that can be locally and reversibly switched between a transparent and a colored state by an applied electrical field, employing acetylene-coupled, highly conjugated polymers with rotatable phenyl components, allowing for bistable optical states for binary data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fuse-type organic polymer memory devices are used, then cost efficiency and durability are improved, but rewritability and stability are lost
Solution Approach 1:
The patent employs reversible phase transitions in the organic polymer film between transparent and colored states through electrical field application. This allows the memory device to switch between states multiple times (rewritable) while maintaining the cost-effective organic polymer material base, thus resolving the contradiction between manufacturing cost and operational reliability.
Solution Approach 2:
The patent introduces dynamic switching capability through application of electrical fields that reversibly change the optical properties of the polymer film. This dynamic control enables repeated writing and reading operations, transforming the static fuse-type memory into a rewritable system while maintaining economic viability.
2Quantity of substance
If traditional magnetic disk memories are used, then storage capacity has been steadily decreased, but newer organic polymer memories lack stable rewritable options
Solution Approach 1:
The patent uses composite organic polymer materials with specific molecular structures (acetylene-coupled, highly conjugated polymers with rotatable phenyl components) that provide both high storage density through local switching capability and stable rewritable operation through reversible optical state changes, achieving both high quantity and reliability.
Solution Approach 2:
The patent implements local switching of individual bits within the polymer film through localized electrical field application. This allows high-density storage by addressing individual regions while maintaining overall film stability, enabling both high storage capacity and reliable rewritable operation.
3Quantity of substance
If optical state switching is implemented in organic polymer films, then high-density storage is achieved, but long-term stability of optical states must be ensured
Solution Approach 1:
The patent uses stable molecular configurations in the organic polymer that maintain optical states without requiring continuous energy input. The rotatable phenyl components settle into stable coplanar or perpendicular orientations that persist indefinitely, providing long-term stability for high-density storage.
Solution Approach 2:
The patent changes the molecular orientation parameters of the polymer chains through electrical field application, creating stable coplanar or perpendicular configurations. These parameter changes result in persistent optical states that maintain high storage density while ensuring long-term stability.
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
Enables stable, high-density, and rewritable memory storage with precise control over binary values, facilitating efficient data access and representation using an optoelectronic-mechanical read/write device, with optical states remaining stable over long periods.
Implementation Method 1
an organic-polymer film that can be locally and reversibly switched between a transparent state to a colored, visible-light-absorbing-and/or-reflecting state by a change in the direction of an applied electrical field
Data Source
AI summary
Method for employing optical state-change organic polymer films as information-storage layers in optoelectronic, high-density memories, and high-density optoelectronic memories produced by the method. In certain embodiments, the optical state-change organic polymer films can be manufactured to exhibit two different, stable optical states, one transparent, and one light-absorbing and/or light-reflecting, that can be locally, stably, and reversibly induced by application of an electrical field. In various embodiments, information is digitally encoded in an information-storage layer as bits, the value of each bit represented by the optical state of an area of the information-storage layer corresponding to the bit. In various embodiments, the optical state of a small region of the information-storage layer can be determined by exposing the small region to visible light, and determining whether or not a photodiode layer in an information-storage medium below the information-storage layer generates an electrical current in response to illumination.