Nitride Multi-Channel Switching Layout to Eliminate PCB Parasitics
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Solution Overview
Problem
Conventional multi-channel power supply systems using discrete switching devices on printed circuit boards face issues with parasitic elements, leading to inefficiencies and reliability concerns, and occupy large board areas, especially in high-frequency applications like 5G communication and LiDAR systems.
Innovation Solution
A nitride-based multi-channel switching device is integrated into a single semiconductor chip, featuring a substrate, gate structures, source electrodes, and drain electrodes arranged to form transistors with interconnected gate, source, and drain pads, eliminating parasitic elements and reducing system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete switching devices are mounted on a printed circuit board, then the system can be assembled using conventional methods, but parasitic elements are introduced and board area increases
Solution Approach 1:
The patent merges multiple discrete switching devices into a single integrated multi-channel switching device fabricated on one semiconductor chip. This integration eliminates the need for separate discrete devices and their interconnections on a printed circuit board, thereby removing parasitic elements while maintaining manufacturability through standard semiconductor fabrication processes
2Adaptability or versatility
If discrete switching devices are interconnected through a printed circuit board, then the system can be constructed using standard electronics, but parasitic elements affect efficiency and reliability
Solution Approach 1:
The patent combines multiple switching channels into a single integrated device where all switching elements share common source and drain regions. This merging eliminates the interconnection traces and parasitic elements between discrete devices, reducing energy loss while preserving the multi-channel functionality needed for various power supply configurations
3Ease of operation
If multiple discrete switching devices are used for multi-channel power supply, then each channel can be independently controlled, but the board area occupied increases
Solution Approach 1:
The patent integrates multiple independently controllable switching channels into a single semiconductor device. Each channel has its own gate electrode for independent control, but all channels share common source and drain regions, dramatically reducing the area required compared to discrete devices while maintaining independent channel operation
Solution Approach 2:
The patent transitions from a planar two-dimensional layout of discrete devices on a circuit board to a three-dimensional integrated structure where multiple channels are stacked or arranged vertically within the semiconductor chip. This dimensional change allows dense packing of multiple channels in a compact footprint
4Ease of manufacture
If discrete switching devices are mounted on a printed circuit board, then the system can be assembled conventionally, but the system size is large
Solution Approach 1:
The patent consolidates multiple switching devices into one integrated chip, eliminating the need for a large printed circuit board and associated mounting hardware. The compact integrated device can be directly mounted in small packages, dramatically reducing overall system volume while remaining compatible with standard assembly processes
Data Source
AI summary
The present invention provides a nitride-based multi-channel switching device having a plurality of transistors. The multi-channel switching device comprises a substrate, a plurality gate structures, a plurality of source electrodes and a plurality of drain electrodes. The gate structures, source electrodes and drain electrodes are grouped to form the plurality of transistors and arranged such that each gate structure disposed between a source electrode and drain electrode. Each group of the gate structures are electrically interconnected and connected to at least one gate pad corresponding to each of the transistor. Each group of the drain electrode are electrically interconnected and connected to at least one drain pad corresponding to each of the transistor. All groups of the source electrodes are electrically interconnected and connected to at least one common source pad.