3D IC Through-Silicon Vias and Segmented Layers
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Solution Overview
Problem
The development of true three-dimensional integrated circuits (3D ICs) faces challenges in yield and reliability due to complex architectures and deep submicron process generation difficulties, requiring new architectures and improved testing techniques.
Innovation Solution
The implementation of a 3D device structure with aligned layers, including clock distribution structures and flip-flop chains, interconnected through through-layer vias, and utilizing antifuse-based programmable interconnect tiles for flexible logic configurations, enabling efficient communication and redundancy for enhanced reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Through Silicon Via technology is used to bond multiple layers of silicon to form true 3D IC, then three-dimensional integration is achieved, but yield and reliability difficulties increase due to complex architectures
Solution Approach 1:
The patent divides the 3D IC architecture into modular functional blocks (logic layers, memory layers, I/O layers) that can be independently designed, tested, and bonded. Each layer is segmented into manageable units with standardized interfaces, reducing the complexity of the overall system and improving yield through modular manufacturing and assembly processes.
Solution Approach 2:
The patent transitions from traditional 2D planar integration to true 3D vertical stacking by utilizing Through Silicon Via technology to create vertical interconnects between multiple bonded silicon layers. This dimensional change enables higher integration density while the modular approach within each layer mitigates the reliability challenges associated with complex 3D architectures.
2Adaptability or versatility
If complex architectures are implemented in deep submicron process generations, then functionality is enhanced, but manufacturing precision and yield deteriorate
Solution Approach 1:
The patent segments complex functional architectures into smaller, manageable functional blocks that can be manufactured with higher yield in deep submicron processes. Each segment is independently optimized and tested before bonding, reducing the cumulative defect rate and improving overall manufacturing precision while maintaining enhanced functionality through the combination of multiple segments.
Solution Approach 2:
The patent implements preliminary testing and characterization of individual functional blocks before final assembly into the complete 3D IC system. This preliminary action allows for early detection and correction of manufacturing defects, ensuring that only high-yield components are integrated into the final product, thereby maintaining manufacturing precision despite the complexity of deep submicron architectures.
3Adaptability or versatility
If multiple layers are bonded together with Through Silicon Via technology, then true 3D IC structure is formed, but device complexity increases
Solution Approach 1:
The patent organizes the 3D IC structure into segmented functional layers (logic, memory, I/O) with standardized interlayer interfaces. This segmentation reduces device complexity by providing a systematic framework for design and manufacturing, making the complex 3D structure more manageable through modular construction and assembly procedures.
Solution Approach 2:
The patent implements universal standardized interfaces and bonding protocols that can be applied across different functional layers and device types. This universality reduces device complexity by eliminating the need for custom-designed interconnect schemes for each layer, allowing the same bonding and interconnection methodologies to be reused throughout the 3D IC construction process.
Data Source
AI summary
A 3D device, including: a first layer including first transistors, the first transistors interconnected by a first layer of interconnection; a second layer including second transistors, the second transistors overlaying the first layer of interconnection, where the first layer includes a first clock distribution structure, where the second layer includes a second clock distribution structure and a second clock origin, where the second clock origin is connected to the first clock distribution structure with a plurality of through layer vias, and where the second layer thickness is less than 1 micrometer.