Semiconductor Electrode Layout for Balanced Current and Fast Gate Signals
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Solution Overview
Problem
Existing semiconductor devices with linear gate liners experience unbalanced current distribution, leading to reduced short circuit tolerance and delayed gate signals.
Innovation Solution
The semiconductor device incorporates finger wiring, surface electrodes, and annular gate wiring with interconnected gate electrodes to stabilize emitter potential and reduce gate signal delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a linear gate liner is used to transmit gate signals, then gate signal delay is reduced, but the emitter electrode is divided causing unbalanced current distribution and reduced short circuit tolerance
Solution Approach 1:
The emitter electrode is divided into multiple surface electrodes (first, second, and third surface electrodes) arranged in a specific pattern. This segmentation allows the gate liner to be positioned without completely dividing the emitter, maintaining current distribution balance while still enabling effective gate signal transmission and reducing gate signal delay.
Solution Approach 2:
The gate liner is positioned specifically between the first and second surface electrodes rather than dividing the entire emitter electrode uniformly. This localized positioning maintains balanced current distribution in the regions adjacent to the gate liner while still achieving effective gate signal transmission, thus resolving the contradiction between reducing gate delay and maintaining short circuit tolerance.
2Speed
If the emitter electrode is divided by a gate liner, then gate signal transmission is improved, but current distribution becomes unbalanced
Solution Approach 1:
The emitter electrode is segmented into multiple surface electrodes (first, second, and third surface electrodes) with the gate liner positioned between specific ones. This segmentation strategy allows the gate liner to be placed for effective signal transmission while maintaining sufficient conductive paths for balanced current distribution across all segments.
Solution Approach 2:
The third surface electrode acts as an intermediary element that connects regions on either side of the gate liner, providing an alternative current path that maintains current distribution balance even when the gate liner is present to enable fast gate signal transmission.
Data Source
AI summary
First and second surface electrodes are disposed so as to sandwich finger wiring extending in a first direction. A gate electrode extends in a second direction. A third surface electrode connects the first surface electrode and the second surface electrode between a tip of the finger wiring and gate wiring. A finger wiring extension portion extends from the tip of the finger wiring toward the gate wiring while avoiding the third surface electrode. A gate electrode crossing the third surface electrode in plan view is electrically connected to the finger wiring extension portion.