Sensing Transistor Diode Testing for Early Semiconductor Defect Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for testing semiconductor devices, such as IGBTs, fail to detect defects early in the manufacturing process, leading to wasted resources and increased costs due to embedding defective components in semiconductor modules.
Innovation Solution
A testing method that measures the voltage-current characteristic of a sensing transistor portion in the semiconductor device before integration, allowing for early detection of defects by comparing the measured characteristics with predefined thresholds, thereby reducing the likelihood of embedding defective components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional testing methods are used for semiconductor devices, then the manufacturing process is simple, but defects are not detected early leading to wasted resources and increased costs
Solution Approach 1:
The patent applies preliminary action by measuring the voltage-current characteristic of the sensing transistor portion before the semiconductor device is embedded in the module. This early measurement allows defect detection at the component level rather than at the module level, enabling defective devices to be identified and excluded before integration into the final product, thereby preventing waste of resources on defective components
Solution Approach 2:
The patent extracts the sensing transistor portion's voltage-current characteristic measurement from the overall module testing process. By isolating and measuring this specific characteristic of the sensing transistor portion separately, the method enables targeted defect detection without requiring complete module assembly and testing, thus reducing testing complexity while improving defect detection capability
2Loss of substance
If early defect detection is implemented by measuring voltage-current characteristics, then defective components are excluded reducing waste, but the measurement and comparison process adds complexity
Solution Approach 1:
The patent replaces complex mechanical assembly and comprehensive module testing with an electrical measurement approach. By measuring the voltage-current characteristic of the sensing transistor portion using electrical testing methods, the process detects defects without requiring physical assembly of the complete module, thereby reducing resource waste while the measurement complexity is managed through standardized electrical testing procedures
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
This approach reduces the rate of defective semiconductor modules by identifying and excluding defective devices early in the manufacturing process, thereby minimizing waste and lowering production costs.
Implementation Method 1
a measurement unit configured to measure a voltage-current characteristic of the sensing transistor portion when a test voltage is applied between a source terminal and a drain terminal
Data Source
AI summary
Provided is a testing method for testing a semiconductor device provided with a main element portion including a main transistor portion and a main diode portion, and a sensing transistor portion for current detection, the testing method having: operating an element by causing a diode operation of the sensing transistor portion in the semiconductor device in a chip or wafer state; measuring the element by measuring a voltage-current characteristic showing a relationship between a voltage between main terminals of the sensing transistor portion and a current flowing through the main terminals during the diode operation; and determining the element by determining a defectiveness of the semiconductor device based on the voltage-current characteristic.