Semiconductor Switch Segmentation for Low-Voltage Reliability
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Solution Overview
Problem
The existing electrical resistance changing elements used in semiconductor devices, such as ReRAM and NanoBridge, face issues with false writing (OFF disturbance) due to external noise and logic amplitude, especially when the programming voltage is lowered to match the operating voltage, leading to reliability concerns and increased power consumption.
Innovation Solution
A semiconductor device is designed with a unit element comprising two switches with electrical resistance changing layers, where one electrode of each switch is connected to form a common node, and the other electrodes form separate nodes, allowing for controlled signal transmission through a first and second wiring, thereby reducing the risk of OFF disturbance and enabling lower driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the programming voltage is lowered to match the operating voltage, then power consumption is reduced, but immunity against OFF disturbance becomes weak
Solution Approach 1:
The patent divides the switching element into two separate switches (first switch and second switch) connected in series between the first and second wirings. Each switch has its own electrodes and switching element. This segmentation allows independent control of each switch, enabling the first switch to be controlled in a state that prevents OFF disturbance while the second switch handles the low-voltage switching operation, thus resolving the contradiction between low power consumption and high immunity against OFF disturbance.
2Device complexity
If a single switching element is used, then device complexity is low, but false writing occurs due to external noise
Solution Approach 1:
The patent segments the single switching element into two switches connected in series. The first switch is configured to maintain a controlled state (either ON or OFF depending on the embodiment) to block noise signals from affecting the second switch. This segmentation increases reliability by preventing false writing caused by external noise, while the overall structure remains relatively simple with only two switches and their associated electrodes and wirings.
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 solution provides high reliability and lowers the driving voltage, preventing false writing and improving the semiconductor device's performance by ensuring that either switch maintains the OFF state even under noise conditions, thus enhancing the device's immunity to disturbances.
Implementation Method 1
each of the first switch and the second switch includes an electrical resistance changing layer whose state of the electrical resistance is changed according to a polarity of an applied voltage
Data Source
AI summary
A semiconductor device according to the present invention includes: an unit element which includes a first switch and a second switch, wherein each of the first switch and the second switch includes an electrical resistance changing layer whose state of electrical resistance is changed according to a polarity of an applied voltage, and each of the first switch and the second switch has two electrodes, and wherein one electrode of the first switch and one electrode of the second switch are connected each other to form a common node, and the other electrode of the first switch forms a first node, and the other electrode of the second switch forms a second node; a first wiring which is connected with the first node and forms a signal transmission line; and a second wiring which is connected with the second node and is connected with the first wiring through the unit element.