Electrochemical Fin Memory Cell for Fast Ion Exchange at Small Scale
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Solution Overview
Problem
As the integration density of semiconductor memory devices increases, there is a need to reduce the size of electrochemical memory cells while maintaining an accurate resistance ratio and rapid operation characteristics.
Innovation Solution
The electrochemical memory cell incorporates an electrochemical fin structure with a protruded channel, a gate that overlaps with the channel, and an interface layer that controls ion exchanges based on gate voltage, enabling rapid and accurate memory operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of electrochemical memory cell is reduced to increase integration density, then integration density is improved, but operation speed and resistance ratio accuracy deteriorate
Solution Approach 1:
The patent transitions from a planar 2D channel structure to a three-dimensional fin-shaped channel structure that protrudes upward. This vertical dimensionality change increases the effective channel surface area without increasing the planar footprint, thereby maintaining rapid ion exchange performance while reducing the overall memory cell area for higher integration density.
Solution Approach 2:
The gate electrode is divided into multiple segments (first gate electrode and second gate electrode) that can be independently controlled. This segmentation allows for optimized voltage application across different regions of the fin channel, improving resistance ratio accuracy and enabling precise control of ion exchange even in the reduced-size structure.
2Area of stationary object
If the size of electrochemical memory cell is reduced to increase integration density, then integration density is improved, but resistance ratio accuracy deteriorates
Solution Approach 1:
The gate electrode is divided into multiple segments (first gate electrode and second gate electrode) that can be independently controlled. This segmentation allows for optimized voltage application across different regions of the fin channel, improving resistance ratio accuracy and enabling precise control of ion exchange even in the reduced-size structure.
Solution Approach 2:
Different regions of the fin channel are subjected to different gate voltages through the segmented gate electrodes. This local quality control enables precise manipulation of ion exchange in specific channel regions, ensuring accurate resistance ratio control despite the overall reduction in memory cell size.
3Ease of manufacture
If conventional planar channel structure is used, then manufacturing is simpler, but ion exchange speed is slower
Solution Approach 1:
The patent transitions from a planar 2D channel structure to a three-dimensional fin-shaped channel structure that protrudes upward. This vertical dimensionality change increases the effective channel surface area without increasing the planar footprint, thereby maintaining rapid ion exchange performance while reducing the overall memory cell area for higher integration density.
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 design enhances integration density and operation speed, achieving rapid ion exchange and low power consumption, thereby improving the performance of neural network memory devices.
Implementation Method 1
The electrochemical memory cell may perform a memory operation by an ion exchange with a channel in accordance with a gate voltage (or a gate current).
Implementation Method 2
The interface layer may be formed between the protrusion surface of the electrochemical channel and the gate. The interface layer may control ion exchanges for memory operations between the gate and the electrochemical channel based on a gate voltage.
Implementation Method 3
The electrolyte layer may selectively provide the ions to the channel region through both sidewalls and the upper surface of the channel region based on a gate voltage.
Implementation Method 4
The electrochemical fin structure may be protruded from a surface of a lower layer. The gate may be overlapped with a channel region of the electrochemical fin structure.
Data Source
AI summary
An electrochemical memory cell may include an electrochemical channel, a gate and an interface layer. The electrochemical channel may include a protruded surface having a fin-shape. The gate may be overlapped with the protruded surface of the electrochemical channel. The interface layer may be formed between the protruded surface of the electrochemical channel and the gate. The interface layer may control ion exchanges for memory operations between the gate and the electrochemical channel based on a gate voltage.