Semiconductor Gate Pitch and Interconnection Line Pitch Optimization
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Solution Overview
Problem
Current semiconductor devices face challenges in increasing integration density while maintaining reliability and reducing error rates, particularly in achieving high-speed and multi-functional capabilities.
Innovation Solution
The semiconductor device incorporates a field effect transistor with a substrate featuring PMOSFET and NMOSFET regions, where gate electrodes and interconnection lines are arranged at specific pitches, and internal interconnection lines are realigned to optimize layout design and manufacturing processes, allowing for increased integration density without increasing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the gate pitch is reduced to increase integration density, then the integration density increases, but the manufacturing precision and defect rates worsen
Solution Approach 1:
The patent divides the interconnection line pitch into two separate pitches: a first pitch for gate electrodes and a second pitch for interconnection lines. This segmentation allows independent optimization of each pitch, enabling the gate pitch to be reduced for higher integration density while the interconnection line pitch can be adjusted separately to maintain manufacturing precision and reduce defect rates.
Solution Approach 2:
The patent applies different pitch values to different regions of the device structure. By setting the gate pitch at a first value and the interconnection line pitch at a second value (which may differ from the first), the invention optimizes local characteristics for their specific functions, allowing reduced gate pitch for density while maintaining appropriate spacing for interconnection reliability.
2Quantity of substance
If the gate pitch is reduced to increase integration density, then the integration density increases, but the device complexity increases
Solution Approach 1:
The patent segments the pitch parameter into two distinct values: one for gate electrodes and another for interconnection lines. This segmentation simplifies the layout design process by providing clear, separate guidelines for different structural elements, reducing the complexity that would otherwise arise from trying to optimize a single pitch value for multiple functions.
Solution Approach 2:
The invention changes the pitch parameter from a single uniform value to two distinct values depending on the structural element. This parameter differentiation allows for simplified design rules and manufacturing processes, as each element type has its own optimized pitch value, thereby reducing overall device complexity while increasing integration density.
3Ease of manufacture
If internal interconnection lines are realigned with interconnection line pattern tracks, then the manufacturing process is simplified, but the layout design flexibility is reduced
Solution Approach 1:
The patent applies realignment selectively to internal interconnection lines while allowing other elements to maintain their original layout positions. This localized realignment approach simplifies the manufacturing process for critical interconnection elements while preserving layout design flexibility for other components that do not require realignment.
Solution Approach 2:
The invention changes the positional parameter of internal interconnection lines to align with interconnection line pattern tracks, but only where necessary for manufacturing simplification. This selective parameter adjustment maintains overall layout flexibility while achieving manufacturing benefits in specific critical areas.
Data Source
AI summary
A semiconductor device includes a substrate including a PMOSFET region and an NMOSFET region. First active patterns are on the PMOSFET region. Second active patterns are on the NMOSFET region. Gate electrodes intersect the first and second active patterns and extend in a first direction. First interconnection lines are disposed on the gate electrodes and extend in the first direction. The gate electrodes are arranged at a first pitch in a second direction intersecting the first direction. The first interconnection lines are arranged at a second pitch in the second direction. The second pitch is smaller than the first pitch.