Hybrid Cell Region Layout for Higher Transistor Density
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Solution Overview
Problem
The semiconductor industry faces challenges in achieving high transistor density and improved speed without significant area increases, as existing technologies struggle to efficiently integrate diverse active regions with varying dopant types and sizes in semiconductor devices.
Innovation Solution
The implementation of a hybrid cell region structure with active regions of different sizes and dopant types, arranged in specific configurations to optimize speed and area usage, including the use of filler regions with specific dopant types to balance dopant distribution and maintain uniformity in power rail pitch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If transistor density is increased by reducing component sizes and tightening spacing, then transistor density improves, but area constraint becomes more challenging
Solution Approach 1:
The patent applies local quality by creating hybrid cell regions with different dopant types (N-type and P-type) and varying transistor sizes within the same cell region. This allows different areas of the cell to have optimized characteristics - some areas with higher transistor density for speed-critical functions, and other areas with larger transistors for functions requiring higher drive strength, thereby increasing overall transistor density without uniformly increasing cell region area
2Speed
If hybrid cell regions with varying transistor speeds and sizes are implemented, then operational speed improves, but manufacturing complexity increases
Solution Approach 1:
The patent segments the cell region into distinct hybrid cell regions with different dopant types and transistor size configurations. Each segment is designed to optimize for specific operational requirements (speed, drive strength, area efficiency). This segmentation allows complex functionality to be achieved through modular composition of standardized hybrid cell region blocks, making the overall device more manageable despite the variety of configurations
Solution Approach 2:
The patent utilizes parameter changes by varying dopant types (N-type, P-type) and transistor size parameters across different hybrid cell regions to optimize operational speed. By systematically changing these parameters in a controlled manner according to design requirements, the patent achieves high-speed operation while maintaining manufacturability through standardized process compatibility
3Area of stationary object
If kernel cell regions are stacked vertically and horizontally to optimize layout, then area efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements nested doll by stacking kernel cell regions both vertically (multiple layers of transistors) and horizontally (adjacent cell regions sharing common structures). This nesting approach maximizes area efficiency by utilizing three-dimensional space and shared boundaries. The standardized interfaces and alignment features between nested cell regions ensure that manufacturing precision requirements are met through repeatable process steps
Data Source
AI summary
A cell region of a semiconductor device includes: active regions (ARs) formed as predetermined shapes on a substrate including first and second ARs having a first shape and correspondingly first and second dopant types, a third AR having a second shape and the second dopant type, and a fourth AR having a third shape and the first dopant type. The first and second ARs are arranged in a first area of the cell region. The third and fourth ARs are arranged in a second area of the cell region. The second area is adjacent to the first area relative to a first direction (e.g., Y-axis (vertical adjacency-architecture) or X-axis (horizontal adjacency-architecture)). The first shape is smaller than the second shape. The second shape is smaller than the third shape.