Plate Conductor Layout for Current Detection in Power Semiconductors
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Solution Overview
Problem
Current semiconductor devices lack an effective method to detect current flowing in circuits, particularly in power modules used for high-output applications like railroad vehicles and renewable-energy systems, where precise current monitoring is crucial for efficient operation and safety.
Innovation Solution
A semiconductor device configuration that includes a substrate with conductors and transistors connected via a conductor with bridge portions and leads, allowing for the detection of current flowing between transistors through terminals, enabling monitoring of induced electromotive force and current detection without affecting the wiring pattern or increasing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional wiring patterns are used in power modules, then the device structure is simple, but current detection capability is lost
Solution Approach 1:
The patent combines the conductor serving multiple functions: it acts as both a wiring element connecting transistors and a current detection element. The bridge portion of the conductor forms part of the current path while also serving as the sensing element, merging the wiring and measurement functions into a single integrated structure.
Solution Approach 2:
The conductor is designed to perform multiple functions simultaneously: electrical connection between transistors, current carrying, and current detection. The bridge portion specifically serves as both a structural connector and a sensing element that detects current through induced electromotive force, embodying multi-functionality.
2Measurement precision
If additional current detection components are added, then current monitoring capability is improved, but the number of components increases
Solution Approach 1:
The patent merges the current detection function into the existing conductor structure rather than adding separate detection components. The bridge portion of the conductor itself becomes the sensing element, eliminating the need for additional current detection components.
Solution Approach 2:
The conductor serves itself by using its own bridge portion as the detection element. The induced electromotive force generated in the bridge portion during current flow is directly utilized for current detection, allowing the wiring structure to perform self-monitoring without external detection components.
3Measurement precision
If conventional conductors are used, then manufacturing is simple, but current detection function is not achieved
Solution Approach 1:
The conductor is segmented into distinct functional portions: a first portion for electrical connection and a bridge portion for current detection. This segmentation allows the bridge portion to be specifically optimized for sensing while maintaining manufacturability through standard conductor formation processes.
Solution Approach 2:
The bridge portion extends in a direction different from the main current flow direction, creating a geometric configuration that enables electromagnetic induction for current detection. This dimensional arrangement allows the conductor to detect current through induced electromotive force while maintaining a manufacturable planar structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate current detection in semiconductor devices, reducing the load for current monitoring and allowing for external monitoring of current flowing between transistors, thus improving the operational efficiency and reliability of power modules.
Implementation Method 1
A bridge portion of the third conductor extends in a direction different from a current flow direction in the bridge portion
Data Source
AI summary
According to one embodiment, a semiconductor device include a substrate, a first conductor on an upper surface of the substrate and a second conductor on the upper surface of the substrate. The first conductor is separated from the second conductor. A first transistor is on an upper surface of the first conductor. A first end of the first transistor is electrically connected to the first conductor. A second transistor is on an upper surface of the second conductor. A first end of the second transistor is electrically connected to the second conductor. A third conductor has a first portion that is a flat plate shape. The first portion is at a height above upper surfaces of the first and second transistors. The third conductor electrically connects a second end of the first transistor to the first end of the second transistor.