Ferroelectric Transistor Logic Elements for Reconfigurable Semiconductor Density
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Solution Overview
Problem
Current reconfigurable semiconductor devices face limitations in flexibility, logic density, and power consumption, as they require significant overhead in pre-programming non-volatile memories for hardware configuration, which reduces their adaptability and efficiency.
Innovation Solution
The implementation of programmable logic elements based on ferroelectric transistors that allow for non-volatile adjustment of device characteristics, enabling dynamic reconfiguration of logic elements while maintaining a static configuration, thereby enhancing flexibility and logic density without the need for additional memory storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If field programmable gate arrays are used to provide reconfigurable hardware, then flexibility is improved, but power efficiency and density of computational resources deteriorate due to the need for non-volatile memory storage
Solution Approach 1:
The patent merges the configuration storage function directly into the logic element structure by integrating a ferroelectric layer with the transistor gate, eliminating the need for separate non-volatile memory devices. This integration allows the logic element to inherently store its configuration state without requiring additional memory overhead.
Solution Approach 2:
The logic element is designed to perform multiple functions: it acts as both a computational logic unit and a non-volatile memory storage unit simultaneously. The ferroelectric layer enables the same transistor structure to store configuration data and execute logic operations, removing the need for dedicated memory components.
2Adaptability or versatility
If non-volatile memory is added to store hardware configuration, then adaptability is improved, but power consumption increases due to pre-programming overhead
Solution Approach 1:
The configuration storage and logic computation functions are merged into a single integrated structure. The ferroelectric layer is physically integrated with the transistor gate, allowing the same device to both store configuration and perform computation without requiring separate memory devices and their associated power overhead.
Solution Approach 2:
The logic element uses its own internal ferroelectric layer to store its configuration state, making it self-sufficient. The device configures and maintains itself without requiring external non-volatile memory devices or additional power-consuming pre-programming operations.
3Adaptability or versatility
If additional memory storage is implemented for hardware configuration, then reconfigurability is improved, but device area and complexity increase
Solution Approach 1:
The patent combines the memory storage function with the logic element structure by integrating a ferroelectric layer into the transistor gate. This vertical integration allows configuration storage within the same footprint as the logic unit, eliminating the need for additional lateral space for separate memory devices.
Solution Approach 2:
The configuration storage is moved from a lateral arrangement (separate memory devices placed next to logic elements) to a vertical arrangement (ferroelectric layer stacked within the transistor structure). This dimensional transition enables memory functionality within the same planar footprint as the logic element.
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 provides a high degree of flexibility and moderately high logic density by allowing dynamic adaptation of logic behavior in semiconductor devices, reducing power consumption and eliminating the need for additional memory storage, thus improving the economic importance of reconfigurable semiconductor devices.
Implementation Method 1
A logic element may be formed on the basis of a P-type ferroelectric transistor element and an N-type ferroelectric transistor element
Data Source
AI summary
In illustrative embodiments disclosed herein, a logic element may be provided on the basis of a non-volatile storage mechanism, such as ferroelectric transistor elements, wherein the functional behavior may be adjusted or programmed on the basis of a shift of threshold voltages. To this end, a P-type transistor element and an N-type transistor element may be connected in parallel, while a ferroelectric material may be used so as to establish a first polarization state resulting in a first functional behavior and a second polarization state resulting in a second different functional behavior. For example, the logic element may enable a switching between P-type transistor behavior and N-type transistor behavior depending on the polarization state.