Raised-Terminal Diode Structure for Breakdown Voltage Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diode structures for high-performance applications in radiofrequency technologies, such as millimeter-wave frequency-doublers and low-noise voltage-controlled oscillators, require improved designs to enhance performance and efficiency, particularly in terms of breakdown voltage tuning and reduced leakage.
Innovation Solution
A diode structure is fabricated using a semiconductor-on-insulator substrate with a buried insulator layer, shallow trench isolation, and epitaxially grown semiconductor layers with varying doping concentrations, featuring raised terminals and a gate positioned laterally between them, allowing for adjustable breakdown voltage and reduced capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diode structures are used, then manufacturing is simpler, but breakdown voltage tuning capability and leakage reduction are insufficient
Solution Approach 1:
The semiconductor layer is divided into three distinct sections (first, second, and third sections) with different doping concentrations, allowing independent optimization of each region for breakdown voltage control and leakage reduction while maintaining overall device functionality
Solution Approach 2:
Each section of the semiconductor layer is assigned a specific doping concentration tailored to its functional requirements: the first section has a first doping concentration optimized for one terminal, the second section has a second doping concentration for the other terminal, and the third section has a third doping concentration for the gate region, enabling localized performance optimization
2Reliability
If conventional diode structures are used, then fabrication process is simpler, but leakage is higher
Solution Approach 1:
The semiconductor layer is segmented into three sections with different doping concentrations, allowing each region to be optimized for minimizing leakage currents while maintaining ease of fabrication through a single-layer structure that can be formed using standard epitaxial growth processes
Solution Approach 2:
The doping concentration parameter is varied across different sections of the semiconductor layer, with the first section having a first doping concentration, the second section having a second doping concentration, and the third section having a third doping concentration, enabling leakage reduction through parameter optimization without complicating the manufacturing process
Data Source
AI summary
Structures for a diode and methods of fabricating a structure for a diode. The structure includes a layer comprised of a semiconductor material. The layer includes a first section, a second section, and a third section laterally positioned between the first section and the second section. The structure includes a first terminal having a raised semiconductor layer on the first section of the layer, a second terminal including a portion on the second section of the layer, and a gate on the third section of the layer.