Snubber Circuit Withstand Voltage Detection in Semiconductor Devices
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Solution Overview
Problem
Existing semiconductor devices with snubber circuits lack a method to confirm the withstand voltage after integration, as the snubber circuit's potential is not distinguishable from the P and N electrodes, leading to undetectable cracks and reduced quality control.
Innovation Solution
A semiconductor device design where the snubber circuit is separated from the circuit pattern on an insulating substrate, with a resistance and capacitor positioned on distinct substrates, allowing for independent electrical connections and enabling the detection of withstand voltage through dielectric voltage-withstand tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the snubber circuit is integrated on the same conductive pattern as P and N electrodes, then the device complexity is reduced, but the measurement precision of withstand voltage cannot be confirmed
Solution Approach 1:
The patent divides the circuit into separate functional areas: the snubber circuit is positioned on a first conductive pattern while the P and N electrodes are on a second conductive pattern. This spatial segmentation allows independent measurement of the snubber circuit's withstand voltage without interference from other high-voltage elements, resolving the contradiction between integration and measurement precision.
2Ease of manufacture
If the snubber circuit is provided on the same potential as P and N electrodes, then the manufacturing process is simplified, but the reliability of withstand voltage confirmation is reduced
Solution Approach 1:
The patent introduces an insulating substrate as an intermediary between the snubber circuit and the P/N electrodes. This intermediate layer electrically isolates the snubber circuit from the high-voltage electrodes, enabling reliable withstand voltage measurement while maintaining a manufacturable structure through standard substrate fabrication processes.
3Device complexity
If the snubber circuit uses a ceramic plate with resistance film, then the component integration is improved, but the measurement precision of withstand voltage remains insufficient
Solution Approach 1:
The patent transitions from a two-dimensional integration approach to a three-dimensional layered structure. The ceramic plate with resistance film is positioned in a specific layer, separated from P and N electrodes by insulating substrates. This dimensional arrangement enables independent electrical measurement paths, achieving both component integration and precise withstand voltage measurement.
Data Source
AI summary
An object of the present disclosure is to provide a semiconductor device capable of confirming withstand voltage of a snubber circuit after providing the snubber circuit and a method of manufacturing the semiconductor device. A semiconductor device according to the present disclosure includes: an insulating substrate; a circuit patterns provided on the insulating substrate; a snubber circuit substrate provided on the insulating substrate separately from the circuit patterns; a resistance provided on one of the circuit patterns and the snubber circuit substrate; a capacitor provided on another one of the circuit patterns and the snubber circuit substrate; and at least one semiconductor element electrically connected to the resistance and the capacitor.