Dual-Port SRAM Cell Segmented Active Patterns
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Solution Overview
Problem
Existing dual-port SRAM cells face challenges in optimizing the layout and performance of pull-down transistors, which affects the overall speed and efficiency of read and write operations.
Innovation Solution
The implementation of a dual-port SRAM cell design that utilizes a plurality of active patterns with different widths in a specific direction, along with the use of cutting units to define cutting areas, enhances the performance of pull-down transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional dual-port SRAM cell layout is used, then manufacturing is simpler, but pull-down performance and operation speed are insufficient
Solution Approach 1:
The active pattern is segmented into multiple regions by introducing cutting units that divide it into first, second, third, and fourth active pattern regions. This segmentation allows different portions of the active pattern to serve different functional purposes, particularly enabling improved pull-down transistor performance while maintaining overall layout organization
Solution Approach 2:
Different regions of the active pattern are given different widths to optimize local transistor performance. The cutting units create regions with varying dimensions that are specifically tailored for pull-down transistor operation, while other regions maintain standard dimensions for other circuit functions
2Speed
If active pattern width is increased to improve transistor performance, then pull-down speed improves, but area occupied increases
Solution Approach 1:
The active pattern is divided into multiple regions by cutting units, allowing the width to be increased only in specific regions where pull-down transistors are located, while other regions maintain smaller widths. This selective width variation improves voltage pulling down speed in critical areas without proportionally increasing the total cell area
Solution Approach 2:
The active pattern regions have non-uniform widths optimized for their specific functions. Regions containing pull-down transistors have increased width to improve performance, while other regions maintain standard width, achieving localized performance enhancement with minimal area penalty
Data Source
AI summary
A dual-port static random access memory (SRAM) cell is provided. The dual-port SRAM cell includes: P-type active patterns that are spaced apart from one another along a first direction, each of the P-type active patterns extending in a second direction perpendicular to the first direction and including at least one transistor. The P-type active patterns include first through sixth P-type active patterns which are sequentially arranged along the first direction. A first cutting area is provided between the second P-type active pattern and a first boundary of the dual-port SRAM cell that extends along the first direction, and a second cutting area is provided between the fifth P-type active pattern and a second boundary that is opposite to the first boundary and extends along the first direction.