GaN Through-Silicon Via Power Bars for Lower-Resistance RF Delivery
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Solution Overview
Problem
Current semiconductor technologies, such as Si and III-V, face limitations in power delivery and RF communication efficiency, necessitating the development of advanced gallium nitride (GaN) integrated circuit technology for improved energy efficiency and performance in smaller form factors.
Innovation Solution
The use of gallium nitride (GaN) devices with through-silicon vias (TSVs) having a tapered profile and multi-gate structures to reduce resistance and enhance power delivery and RF performance, including the integration of source field plates and heterostructures for improved breakdown voltage and linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional Si and III-V technologies are used for power delivery and RF communication, then existing infrastructure can be maintained, but energy efficiency and performance are limited
Solution Approach 1:
The patent transitions from conventional Si and III-V semiconductor materials to gallium nitride (GaN) technology, fundamentally changing the material parameter to achieve superior energy efficiency and performance in power delivery and RF communication applications
Solution Approach 2:
The patent employs composite material structures including GaN-on-Si heterostructures and multi-layer device architectures that combine different materials to optimize both energy efficiency and performance characteristics
2Use of energy by moving object
If GaN devices are used to improve energy efficiency, then power delivery and RF performance are enhanced, but device structure complexity increases
Solution Approach 1:
The patent divides the GaN device into distinct functional segments including separate source and drain regions, gate structures, and field plate components, allowing each segment to be optimized independently while maintaining overall energy efficiency
Solution Approach 2:
The patent introduces multi-gate structures that control the channel from multiple dimensions, enabling superior electrical control and energy efficiency while managing the increased structural complexity through spatial arrangement
3Power
If through-silicon vias with tapered profile are used, then resistance is reduced and power delivery is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric tapered profiles in through-silicon via structures, where the via diameter varies along its length to reduce resistance and improve power delivery while the asymmetry is controlled through specialized manufacturing processes
4Reliability
If multi-gate structures and field plates are integrated, then breakdown voltage and linearity are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functional elements including multi-gate structures and source field plates into a single integrated GaN device architecture, achieving enhanced breakdown voltage and linearity while consolidating the complex structures into a unified design
Data Source
AI summary
Gallium nitride (GaN) devices with through-silicon vias for integrated circuit technology are described. In an example, an integrated circuit structure includes a layer including gallium and nitrogen, the layer including gallium and nitrogen above a silicon substrate. A backside structure is below the silicon substrate and opposite the layer including gallium and nitrogen, the backside structure including conductive features and dielectric structures. The integrated circuit structure also includes a plurality of through-silicon via power bars having a staggered arrangement, individual ones of the through-silicon via power bars extending through the layer including gallium and nitrogen and through the silicon substrate to a corresponding one of the conductive features of the backside structure, and individual ones of the through-silicon via power bars having a tapered portion coupled to an essentially vertical portion.