Semiconductor Logic Cell Active Pattern Spacing Optimization
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Solution Overview
Problem
Current semiconductor devices face challenges in achieving high integration density and reliability while maintaining low power consumption and fast speed, particularly in meeting the increasing demand for multifunctional electronic devices.
Innovation Solution
The semiconductor device incorporates a substrate with multiple logic cells, featuring active patterns and gate structures that optimize spacing and conductivity types, along with device isolation layers and common conductive lines to enhance electric characteristics and integration density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of logic cells and active patterns is increased to meet demand for multifunctional devices, then integration density and functionality are improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The semiconductor device is divided into multiple logic cells (first, second, third logic cells) that are spatially separated and independently structured. Each logic cell contains its own active patterns and can be configured for different logical operations, allowing the device to perform multiple functions through modular segmentation rather than monolithic complexity
Solution Approach 2:
The logic cells are designed with universal structural characteristics - each contains active patterns arranged in similar configurations with gate structures crossing them. This universal design allows the same basic cell structure to be replicated and adapted for different logical operations, enabling multifunctionality through standardized modular units rather than complex custom designs
2Area of stationary object
If logic cells are placed closer together to reduce device area, then integration density is improved, but manufacturing precision requirements increase due to spacing constraints
Solution Approach 1:
Different spacing configurations are applied to different pairs of logic cells based on their specific requirements. The first distance between adjacent active patterns in the first and second logic cells is optimized independently from the second distance between adjacent active patterns in the first and third logic cells. This allows each interface to be tuned for optimal manufacturing precision while maintaining high overall integration density
Solution Approach 2:
The active patterns extend in a second direction that crosses the first direction of arrangement. This multi-dimensional arrangement allows logic cells to be packed more efficiently in the planar space by utilizing both directions, reducing the overall device area without requiring extremely tight spacing in any single direction, thereby easing manufacturing precision requirements
3Reliability
If active patterns are arranged with different spacing distances to optimize electric characteristics, then device performance is improved, but manufacturing complexity increases
Solution Approach 1:
The spacing between active patterns is deliberately made asymmetric - the first distance between adjacent active patterns in the first and second logic cells is different from the second distance between adjacent active patterns in the first and third logic cells. This asymmetric configuration optimizes electric characteristics such as signal interference and capacitance coupling, while the differences are controlled to remain within manufacturable tolerances
Data Source
AI summary
Provided is a semiconductor device including a substrate with first, second, and third logic cells, active patterns provided in each of the first to third logic cells to protrude from the substrate, and gate structures crossing the active patterns. The second and third logic cells are spaced apart from each other in a first direction with the first logic cell interposed therebetween. The active patterns are arranged in the first direction and extend in a second direction crossing the first direction. When measured in the first direction, a distance between the closest adjacent pair of the active patterns with each in the first and second logic cells respectively is different from that between the closest pair of the active patterns with each in the first and third logic cells respectively.