Conductive Structure Layout for DRAM Power Rails
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Solution Overview
Problem
As semiconductor devices shrink in size, there is a need for more efficient layouts of conductive structures that can effectively couple circuit components to voltage sources and ground, while minimizing layout area and simplifying fabrication, particularly in semiconductor memory devices like DRAM.
Innovation Solution
The use of a power rail layout with conductive structures that extend across regions, providing shared virtual power and ground rails between mirrored circuits, reducing the need for individual conductive structures and simplifying the layout by using multiple wiring layers to efficiently distribute voltages like VSS and VSSZ.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual conductive structures are used to couple each circuit component to voltage sources and ground, then reliable electrical connection is achieved, but layout area increases and fabrication complexity increases
Solution Approach 1:
The patent merges multiple individual conductive structures into shared virtual power and ground rails that serve multiple circuit components simultaneously. The conductive structures are configured to extend across regions and provide shared electrical connections to multiple circuit components, reducing the total number of conductive structures needed and minimizing layout area while maintaining reliable electrical connections.
Solution Approach 2:
The conductive structures are designed to perform multiple functions by serving as shared power and ground rails for multiple circuit components. A single conductive structure can couple different circuit components to voltage sources and ground, making the system more efficient and reducing redundancy.
2Reliability
If individual conductive structures are used to couple each circuit component to voltage sources and ground, then reliable electrical connection is achieved, but fabrication complexity increases
Solution Approach 1:
The patent merges multiple individual conductive structures into shared virtual power and ground rails that serve multiple circuit components simultaneously. The conductive structures are configured to extend across regions and provide shared electrical connections to multiple circuit components, reducing the total number of conductive structures needed and minimizing layout area while maintaining reliable electrical connections.
Solution Approach 2:
The conductive structures are designed to perform multiple functions by serving as shared power and ground rails for multiple circuit components. A single conductive structure can couple different circuit components to voltage sources and ground, making the system more efficient and reducing redundancy.
3Reliability
If more conductive structures are used to ensure adequate power and ground coupling, then electrical performance is improved, but layout area increases
Solution Approach 1:
The patent merges multiple individual conductive structures into shared virtual power and ground rails that serve multiple circuit components simultaneously. The conductive structures are configured to extend across regions and provide shared electrical connections to multiple circuit components, reducing the total number of conductive structures needed and minimizing layout area while maintaining reliable electrical connections.
Data Source
AI summary
Embodiments of the disclosure are drawn to arrangements of one or more conductive structures to provide connections to circuits or portions thereof located in different regions of a device. One or more of the conductive structures may include extensions and recesses. The extensions and recesses of different conductive structures may be complementary. That is, the extensions of one conductive structure may extend into a recess of another conductive structure.