GaAsFET Semiconductor Device with Segmented Waveguide
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Solution Overview
Problem
Conventional semiconductor devices face limitations in power output and impedance matching due to the restricted number of wires at connection portions, leading to potential wire melting and reduced design flexibility.
Innovation Solution
The semiconductor device features a base substrate with a semiconductor chip, dielectric substrates, and a waveguide with a lead connection portion connected to an external device through a lead wire and a wire connection portion with a larger width than the lead connection portion, allowing for increased wire count and reduced impedance, along with a metal plating layer and protection patterns to maintain impedance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of wires at the connection portion is increased to handle higher power, then the allowable electric power increases, but the line width must be increased which limits design flexibility and impedance control
Solution Approach 1:
The connection portion is divided into a first connection portion with a first number of wires for high-power handling and a second connection portion with a second number of wires for impedance control. This segmentation allows each portion to be optimized independently - the first portion can use more wires to handle higher power while the second portion maintains appropriate wire count for impedance matching, thus resolving the contradiction between power handling and design flexibility.
2Reliability
If the number of wires at the connection portion is increased to reduce impedance, then impedance matching improves, but the line width increases which limits circuit design flexibility
Solution Approach 1:
The connection portion is segmented into first and second connection portions with different wire configurations. The first connection portion handles power transmission with appropriate wire count for low impedance, while the second connection portion is optimized for impedance matching with the matching circuit. This allows independent optimization of each portion's wire count, improving impedance matching without unnecessarily increasing overall line width and maintaining circuit design flexibility.
Solution Approach 2:
Different wire configurations are applied to different locations within the connection portion. The first connection portion uses a configuration optimized for power handling, while the second connection portion uses a configuration optimized for impedance matching. This local differentiation allows each region to have the quality needed for its specific function, improving overall system performance without compromising design flexibility.
3Power
If the line width is increased to accommodate more wires, then the maximum allowable electric power increases, but the minimum impedance of the connection portion increases making impedance matching difficult
Solution Approach 1:
The connection portion is divided into first and second connection portions with different wire counts and configurations. The first connection portion can have larger wire count and appropriate width for high power handling, while the second connection portion has optimized wire count and width for impedance matching. This segmentation allows the system to achieve both high power capability and good impedance matching without requiring a uniformly wide line throughout.
Data Source
AI summary
A semiconductor device having a GaAsFET and input and output matching circuits connected to the FET is provided. In the semiconductor device, a line, including a wire connection portion connected to the input or output matching circuit and a lead connection portion connected to an input or output lead which is connected to an external circuit, is formed in such a manner that a line width at the wire connection portion is wider than that at the lead connection portion. With the semiconductor device, the number of wires connecting the input or output matching circuits with the wire connection portion can be increased.