Semiconductor Module Layout for Separate Auxiliary Emitter Paths
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Solution Overview
Problem
Existing semiconductor modules face challenges in efficiently managing the separation of auxiliary emitter paths from main current paths, leading to increased switching loss due to shared inductance and voltage changes, which affects the switching time and efficiency of transistor devices.
Innovation Solution
The semiconductor module design separates auxiliary emitter paths from main current paths by direct connections using dedicated wires, reducing common inductance and minimizing shared paths to prevent voltage changes, thereby improving switching efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If auxiliary emitter wiring line is connected to main wiring line through intermediate connection, then wiring flexibility is improved, but inductive effect increases and switching loss worsens
Solution Approach 1:
The patent extracts the auxiliary emitter wiring line from the shared main wiring path and provides it with a separate direct connection to the emitter electrode. This separation removes the inductive effect caused by shared wiring while maintaining wiring flexibility through independent routing.
Solution Approach 2:
The patent segments the emitter potential control path from the main current path by providing a dedicated auxiliary emitter wiring line. This segmentation isolates the control signal path from the high-current path, eliminating mutual interference and reducing switching loss.
2Device complexity
If main and auxiliary wiring lines share common path, then wiring complexity is reduced, but noise interference increases and control precision deteriorates
Solution Approach 1:
The patent segments the control wiring path from the main power path by providing a separate auxiliary emitter wiring line. This segmentation prevents noise coupling from the high-current main wiring to the sensitive control signals, improving gate voltage control precision.
Solution Approach 2:
The auxiliary emitter wiring line acts as an intermediary path that provides a low-inductance, noise-free connection for emitter potential control. This intermediary path isolates the control function from the main power transmission path, reducing noise interference.
Data Source
AI summary
A semiconductor module, including a first main wiring line connecting portion and a second main wiring line connecting portion, and a main output wiring line connecting portion is provided. The circuit board includes a circuit region in which the first circuit and the second circuit are arranged alongside each other in the first direction, and a first connecting region and a second connecting region arranged sandwiching the circuit region in a second direction orthogonal to the first direction. The first main wiring line connecting portion and the second main wiring line connecting portion are provided in the first connecting region, and the main output wiring line connecting portion is provided in the second connecting region.