Nested Fuse Gate Structure for Compact Logic State Discrimination
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Solution Overview
Problem
The existing fuse structures in integrated circuits have an overlarge area, which becomes a disadvantage as integration increases, limiting their efficiency and integration density.
Innovation Solution
A fuse structure is designed with a fuse gate and control gate surrounding the active region, where the fuse gate is electrically connected to a first power source with a higher voltage than the control gate, allowing for controlled breakdown and area-efficient formation of a conductive channel, and the control gate is connected to a second power source, enabling effective discrimination between logic states '0' and '1'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a classic fuse gate structure or discrete fuse gate structure is used, then the fuse function can be achieved, but the area occupied is excessively large
Solution Approach 1:
The control gate structure is nested around the fuse gate structure, with the control gate surrounding the circumferential outer surface of the fuse gate. This nested configuration allows the control gate to wrap around the fuse gate, significantly reducing the overall area occupied by the fuse circuit while maintaining both fuse and control functions
Solution Approach 2:
The gate structures transition from planar layouts to three-dimensional configurations where the control gate wraps around the fuse gate in a circumferential manner. This spatial arrangement in multiple dimensions reduces the footprint area while preserving the electrical connection and logic state discrimination capabilities
2Productivity
If the fuse gate structure is surrounded by control gate structure, then integration density is improved, but the device complexity increases
Solution Approach 1:
The control gate structure serves multiple functions: it surrounds the fuse gate structure to reduce area, provides electrical connection through the circumferential wrapping, and enables logic state discrimination. This multi-functionality increases integration density without proportionally increasing complexity
Solution Approach 2:
The control gate and fuse gate structures are merged into a single integrated assembly where the control gate circumferentially surrounds the fuse gate. This merging combines two separate components into one unified structure, improving integration density while managing complexity through consolidation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces the area required for the fuse circuit, improves integration density, and allows for reliable logic state discrimination by controlling the ON and OFF states of the power sources.
Implementation Method 1
the fuse gate is electrically connected to a first power source with a higher voltage than the control gate, allowing for controlled breakdown and area-efficient formation of a conductive channel
Data Source
AI summary
A fuse structure and a manufacturing method thereof are provided. The fuse structure includes: a substrate; an active region positioned above the substrate; a fuse gate structure surrounding a circumferential outer surface of the active region and electrically connected to a first power source; and a control gate structure surrounding a circumferential outer surface of the fuse gate structure and electrically connected to a second power source. A voltage of the first power source is greater than that of the second power source.