III-Nitride Power IC Integration to Cut Inductance and Switching Loss
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Solution Overview
Problem
Existing power device technologies face challenges in reducing interconnection inductance and resistance to lower power consumption and increase switching speed, particularly in high voltage applications, as integrated circuits for driving power devices are often separated from the power devices, leading to inefficiencies.
Innovation Solution
An integrated device is formed by positioning an integrated circuit (IC) in a silicon body that also serves as a substrate for a III-nitride power semiconductor device, with vias connecting the IC and power device to enable direct operational coupling, utilizing a silicon substrate with a III-nitride heterojunction and insulation layers to reduce leakage current and improve breakdown voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If III-nitride power devices are fabricated using conventional separate substrate architecture, then device fabrication is simplified, but interconnection inductance and resistance increase, leading to higher power consumption and lower switching speed
Solution Approach 1:
The patent merges the driver circuit IC and the III-nitride power device onto a single silicon substrate, creating an integrated device architecture. This consolidation eliminates separate interconnection paths, thereby reducing interconnection inductance and resistance while lowering overall power consumption without complicating the fabrication process
2Ease of manufacture
If III-nitride power devices are fabricated using conventional separate substrate architecture, then device fabrication is simplified, but interconnection resistance increases, leading to lower switching speed
Solution Approach 1:
The integration of the driver circuit IC and power device on the same silicon substrate creates direct electrical connections between corresponding electrodes. This merging eliminates long external interconnection paths, reducing interconnection resistance and enabling faster switching speeds while maintaining fabrication simplicity
3Device complexity
If driver circuit is positioned far from power device, then device complexity is reduced, but interconnection inductance increases, leading to higher power consumption
Solution Approach 1:
The patent positions the driver circuit IC and power device in close proximity on the same silicon substrate, with corresponding electrodes (gate, source, drain) directly aligned and connected. This spatial merging minimizes interconnection inductance and energy loss while the shared substrate provides a straightforward integration platform that does not significantly increase device complexity
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 configuration reduces power consumption and increases switching speed by minimizing interconnection resistance and inductance, enhancing the performance of high voltage power devices through closer integration of ICs and power devices, while improving breakdown voltage and reducing leakage current.
Implementation Method 1
forming a heterojunction structure that includes a buffer layer and a two-dimensional electron gas region for efficient carrier transport
Data Source
AI summary
A III-nitride device that includes a silicon body having formed therein an integrated circuit and a III-nitride device formed over a surface of the silicon body.