Semiconductor Breakdown Protection via Dynamic Auxiliary Voltage
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Solution Overview
Problem
As semiconductor devices shrink in size, their internal high voltage applications lead to worsening breakdown characteristics, degrading overall electrical performance.
Innovation Solution
A semiconductor device incorporating a high-voltage supply circuit, an auxiliary-voltage supply circuit that varies based on the operation state of the high-voltage supply circuit, and a transfer circuit that adjusts voltages to improve breakdown characteristics by managing voltage levels and polarities across transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the size of the semiconductor device becomes smaller, then the integration density increases, but the breakdown characteristics worsen due to internal high voltage applications
Solution Approach 1:
The patent applies dynamics by making the auxiliary voltage supply circuit operational state-dependent. The circuit dynamically adjusts the auxiliary voltage level based on whether the high-voltage supply circuit is currently operating or not, allowing the breakdown protection mechanism to be activated only when needed, thus maintaining high integration density while improving reliability.
Solution Approach 2:
The patent changes the voltage parameter dynamically by supplying different auxiliary voltage levels (first auxiliary voltage when high-voltage supply is inactive, second auxiliary voltage when active). This parameter change allows the device to maintain proper breakdown characteristics across different operational states without increasing device size.
2Power
If a high voltage is supplied internally, then the device can perform high-voltage operations, but the breakdown characteristics deteriorate
Solution Approach 1:
The patent applies preliminary anti-action by proactively supplying an auxiliary voltage to the reference node before breakdown can occur. When the high-voltage supply circuit is inactive, the auxiliary voltage supply circuit maintains a first auxiliary voltage at the reference node, preemptively preventing potential breakdown conditions and protecting the device during high-voltage operations.
Solution Approach 2:
The auxiliary voltage supply circuit acts as an intermediary between the high-voltage supply circuit and the discharge circuit. It mediates the voltage levels by providing a controlled auxiliary voltage to the reference node, ensuring that voltage differences across transistors remain within safe limits while still enabling high-voltage functionality.
3Reliability
If an auxiliary voltage is supplied to the reference node, then the breakdown characteristics improve, but the device complexity increases
Solution Approach 1:
The auxiliary voltage supply circuit is designed with multi-functionality, serving both as a breakdown protection mechanism and as a voltage reference source. By integrating these functions into a single circuit block that operates based on the high-voltage supply circuit's state, the patent improves breakdown characteristics without proportionally increasing device complexity.
Data Source
AI summary
A semiconductor device, wherein the semiconductor device includes a high-voltage supply circuit suitable for supplying a high voltage; a discharge circuit suitable for discharging the high voltage; and an auxiliary-voltage supply circuit suitable for supplying a first auxiliary voltage, which varies according to an operation state of the high-voltage supply circuit, to a reference node of the discharge circuit.