Nitride Semiconductor Clamping Structure for Short-Circuit Punch-Through
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Solution Overview
Problem
Existing semiconductor devices face challenges in maintaining a stable potential difference between current and control electrodes when a short-circuit occurs, leading to potential punch-through and device failure.
Innovation Solution
Incorporating a clamping device comprising multiple transistors electrically connected in parallel with the working device, which fixes the potential difference between current electrodes and control electrodes, preventing punch-through and protecting the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional transistor structure is used without clamping device, then the device structure is simpler, but the potential difference between current electrodes and control electrodes becomes unstable during short-circuit conditions leading to punch-through
Solution Approach 1:
A clamping device is introduced as an intermediary component between the control electrode and current electrodes. This clamping device includes a first clamping transistor and a second clamping transistor that work together to maintain stable potential difference during short-circuit conditions, preventing direct harmful interaction between the control and current electrodes.
Solution Approach 2:
The clamping device is designed to activate automatically when short-circuit conditions are detected, before punch-through can occur. The first and second clamping transistors are configured to respond to voltage conditions and preemptively clamp the potential difference, preventing the harmful punch-through effect from developing.
2Reliability
If no clamping device is used, then the manufacturing process is simpler, but the device is vulnerable to punch-through and failure during short-circuit events
Solution Approach 1:
The clamping function is merged with the existing transistor structure by integrating the first and second clamping transistors into the device architecture. These clamping transistors share common electrodes and substrates with the main transistor, reducing the need for entirely separate manufacturing processes while still providing comprehensive protection.
Solution Approach 2:
The clamping device serves multiple functions: it protects against short-circuit conditions, maintains stable potential difference, prevents punch-through, and can operate automatically without external control. This multi-functionality justifies the additional manufacturing steps by providing comprehensive device protection in a single integrated solution.
3Reliability
If the potential difference is not fixed during short-circuit conditions, then the device operation is more flexible, but punch-through occurs causing device failure
Solution Approach 1:
The clamping device dynamically adjusts its operation based on the electrical conditions. During normal operation, the clamping transistors remain inactive, allowing full operational flexibility. When short-circuit conditions are detected, the clamping transistors automatically activate to fix the potential difference, providing adaptive protection without compromising normal device flexibility.
Solution Approach 2:
The clamping device operates with inherent feedback through its voltage-dependent activation. The first and second clamping transistors monitor the potential difference between control and current electrodes, and automatically respond when abnormal conditions are detected, creating a self-regulating protection mechanism that maintains flexibility during normal operation while ensuring reliability during faults.
Data Source
AI summary
Semiconductor device structures and methods for manufacturing the same are provided. The semiconductor device structure includes a substrate, a first nitride semiconductor layer, a second nitride semiconductor layer, a first transistor and a clamping device. The first nitride semiconductor layer is disposed on the substrate. The second nitride semiconductor layer is disposed on the first nitride semiconductor layer. The first transistor is disposed on the second nitride semiconductor layer. The first transistor includes a first control electrode, a first current electrode and a second current electrode. The clamping device is disposed on the second nitride semiconductor layer and electrically coupled with the first transistor. The clamping device includes a second transistor and a third transistor electrically coupled with the second transistor. The clamping device is electrically coupled with the first current electrode and the second current electrode of the first transistor.