Dummy Line Layout in Semiconductor Cells for Yield Stability
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Solution Overview
Problem
The increasing integration of semiconductor devices leads to a reduction in electrical properties and production yield, necessitating improvements in reliability and electrical performance.
Innovation Solution
A semiconductor device design that includes an active pattern, a gate structure, a bit line, a gate contact, a dummy line between the gate contact and the bit line, and a dummy dielectric layer, where the dummy line is composed of first and second dummy line parts connected by connection parts, and the dummy dielectric layer is positioned between these parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If integration of semiconductor devices is increased, then device functionality and compactness are improved, but electrical properties and production yield are reduced
Solution Approach 1:
The dummy line is divided into multiple segments (first dummy line part, second dummy line part, and third dummy line part) separated by dummy dielectric layers. This segmentation allows each segment to be independently formed and controlled, reducing stress accumulation while maintaining overall electrical connectivity and improving device reliability during high-integration fabrication
Solution Approach 2:
Dummy dielectric layers are introduced as intermediary elements between different dummy line parts and between the dummy line and surrounding structures. These intermediary layers provide electrical isolation and mechanical stress relief, preventing stress-induced defects that would otherwise degrade electrical properties in highly integrated devices
2Volume of moving object
If integration of semiconductor devices is increased, then device compactness is improved, but production yield is reduced
Solution Approach 1:
The dummy line structure is segmented into multiple parts with dummy dielectric layers in between, allowing the structure to accommodate thermal and mechanical stress during fabrication processes. This reduces defect formation and maintains high production yield even as device compactness increases through higher integration
Solution Approach 2:
The dummy line structure utilizes parameter changes in material properties (conductive material for lines, dielectric material for separators) to create a composite structure that maintains electrical connectivity while providing stress management, thereby preserving production yield in compact high-integration devices
Data Source
AI summary
A semiconductor device includes an active pattern, a gate structure that extends in a first direction on the active pattern, a bit line electrically connected to the active pattern and extending in a second direction, a gate contact electrically connected to the gate structure, a dummy line between the gate contact and the bit line, and a dummy dielectric layer at least partially surrounded by the dummy line, where the dummy line includes: a first dummy line part between the dummy dielectric layer and the bit line, a second dummy line part spaced apart from the first dummy line part, and a plurality of connection parts that electrically connect the first and second dummy line parts to each other, and where the dummy dielectric layer is between the first dummy line part and the second dummy line part and is between the plurality of connection parts.