Semiconductor Electrode Layout for Low-Loss Switching Control
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Solution Overview
Problem
Existing semiconductor devices, such as IGBTs, face challenges in minimizing loss while maintaining good switching characteristics, which is crucial for efficient power conversion in various applications.
Innovation Solution
The semiconductor device incorporates a specific structure with multiple semiconductor regions and electrodes, including a third semiconductor region with partial regions and a fourth electrode, which are strategically positioned and electrically connected to optimize the control of current flow and reduce losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional IGBT structure is used, then the device can perform power conversion functions, but loss cannot be sufficiently suppressed
Solution Approach 1:
The third semiconductor region is divided into a first partial region and a second partial region, with different electrodes connected to each region. This segmentation allows independent control of different regions to optimize both loss suppression and switching characteristics.
Solution Approach 2:
A fourth electrode is added that extends in a direction crossing the first direction, creating a two-dimensional electrode arrangement. This dimensional change enables more flexible control of the semiconductor regions to simultaneously achieve loss reduction and maintain switching performance.
2Loss of energy
If loss suppression measures are implemented, then energy efficiency improves, but switching characteristics deteriorate
Solution Approach 1:
Different regions of the third semiconductor region are assigned different functions: the first partial region optimizes for loss suppression while the second partial region maintains switching characteristics. This local differentiation allows simultaneous optimization of both parameters.
Solution Approach 2:
The fourth electrode serves multiple functions by being electrically connected to both the first and second partial regions of the third semiconductor region, enabling it to control both loss suppression and switching characteristics through a single structural element.
Data Source
AI summary
According to one embodiment, a semiconductor device includes first to fourth electrodes, a semiconductor member, and an insulating member. The semiconductor member includes first to sixth semiconductor regions. The third semiconductor region includes first and second partial regions. A part of the fourth semiconductor region is between the second partial and second semiconductor regions. The fifth semiconductor region is between the second partial region and a part of the fourth semiconductor region. The sixth semiconductor region is between the first electrode and the first semiconductor region. The second electrode is electrically connected to the second semiconductor region. The fourth electrode is between the first partial region and the third electrode. A part of the insulating member is provided between the semiconductor member and the third electrode, between the semiconductor member and the fourth electrode, and between the third and fourth electrodes.