WL Drive Transistor Layout for Straight Signal Paths
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Solution Overview
Problem
Current WL drive circuit layouts in memory systems face challenges with island areas and curved signal lines, leading to performance attenuation in electrical signal transmission.
Innovation Solution
A semiconductor structure with two active areas of uniform width, each hosting four WL drive transistor groups with gate dielectric areas connected to a Main-WordLine and control signal lines, arranged to form uniform conductive channels, eliminating island areas and reducing stress, thereby improving signal transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If WL drive circuits are laid out centrally to achieve centralized layout, then layout integration is improved, but signal transmission performance deteriorates due to island areas and curved signal lines
Solution Approach 1:
The patent divides the WL drive circuit layout into multiple groups (first, second, third, and fourth groups) arranged in a specific sequence. Each group contains transistors connected to different control signal lines, creating a segmented structure that eliminates island areas while maintaining centralized layout integration.
Solution Approach 2:
The patent employs asymmetric arrangement of transistor groups where the first and second groups are arranged in a first direction and the third and fourth groups are arranged in a second direction perpendicular to the first direction. This asymmetric layout eliminates curved signal lines and creates uniform charge paths, improving signal transmission while maintaining layout integration.
2Reliability
If transistor groups are arranged in uniform directions to eliminate island areas, then signal transmission performance is improved, but layout design complexity increases
Solution Approach 1:
The layout is segmented into four distinct transistor groups arranged in two perpendicular directions. This segmentation creates a systematic pattern that eliminates island areas and curved signal lines, improving signal transmission while providing a structured approach to layout design.
Solution Approach 2:
The patent transitions from a single-direction arrangement to a two-dimensional grid-like structure where transistor groups are arranged in both first and second perpendicular directions. This dimensional approach systematically eliminates island areas and creates uniform charge paths while maintaining manageable layout complexity through geometric regularity.
3Adaptability or versatility
If curved signal lines are used to connect transistor groups, then layout flexibility is improved, but manufacturing precision deteriorates due to performance attenuation
Solution Approach 1:
The patent replaces curved signal lines with straight signal paths by arranging transistor groups in perpendicular directions. The first and second transistor groups are connected through straight signal lines in the first direction, while the third and fourth groups are connected in the second direction, eliminating the need for curved connections and improving manufacturing precision.
Solution Approach 2:
Instead of curving signal lines to connect transistor groups in various directions, the patent inverts the approach by arranging transistor groups in fixed perpendicular directions and connecting them with straight signal lines. This inversion of the connection strategy eliminates curved signal lines while maintaining layout flexibility through systematic arrangement.
Data Source
AI summary
A semiconductor structure and a chip are provided. The semiconductor structure includes: a first active area and a second active area extending along a first direction and having a first width in a second direction; a first WordLine (WL) drive transistor group including two gate dielectric areas connected to the first active area; a second WL drive transistor group including two gate dielectric areas connected to the first active area; a third WL drive transistor group including two gate dielectric areas connected to the second active area; and a fourth WL drive transistor group including two gate dielectric areas connected to the second active area. Each of the gate dielectric area extends along the second direction and has a second width in the first direction.