Fuse Box Sub-Fuse Segmentation for Laser Cutting Precision
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Solution Overview
Problem
Conventional fuse boxes in memory devices suffer from issues such as corrosion, moisture absorption, cracking, and cutting defects due to the expansion of cut fuse line portions, which can lead to electrical connections with adjacent lines and damage to the device during the laser cutting process.
Innovation Solution
A fuse box design featuring a plurality of sub-fuse lines connected by a connecting pattern, where a fuse window exposes at least a portion of the fuse line, allowing for selective cutting of sub-fuse lines to minimize moisture passage and cutting defects, with the width of the fuse window being greater than the length of the fuse line to prevent corrosion and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuse line is completely exposed through the fuse window to prevent corrosion expansion, then the reliability of preventing cracks improves, but the device complexity increases and manufacturing precision becomes more difficult
Solution Approach 1:
The fuse line is divided into multiple sub-fuse lines (first sub-fuse line and second sub-fuse line) that are spaced apart from each other. This segmentation allows the fuse window to expose only the necessary portions while maintaining structural integrity and reducing the need for complete exposure, thereby preventing cracks without increasing device complexity.
Solution Approach 2:
The fuse window is designed to expose only specific local regions of the fuse line (the sub-fuse lines) rather than the entire fuse line. This localized exposure approach prevents corrosion at critical points while minimizing the overall exposed area, reducing both structural complexity and manufacturing difficulty.
2Object-affected harmful factors
If the fuse window width is reduced to minimize exposure, then moisture absorption decreases, but cutting precision becomes more difficult
Solution Approach 1:
By segmenting the fuse line into spaced-apart sub-fuse lines, the effective width of the fuse window can be reduced while still providing adequate exposure for laser cutting. The spacing between sub-fuse lines allows the fuse window to be narrower, minimizing moisture absorption pathways while maintaining sufficient exposure area for precise cutting operations.
3Productivity
If the laser beam intensity is increased to ensure complete cutting, then cutting speed improves, but the risk of damage to adjacent structures increases
Solution Approach 1:
Segmenting the fuse line into spaced-apart sub-fuse lines allows the laser beam to cut each segment independently with controlled intensity. The spacing provides natural separation that prevents heat accumulation and reduces the risk of damage to adjacent structures, enabling faster cutting speeds without compromising safety.
Solution Approach 2:
The laser cutting process can be optimized for each local region (each sub-fuse line) independently. The fuse window design exposes only the necessary portions, allowing concentrated laser energy to be applied precisely where needed without affecting adjacent areas, thus improving cutting speed while preventing damage.
4Productivity
If multiple sub-fuse lines are cut simultaneously, then productivity improves, but the complexity of controlling cutting precision increases
Solution Approach 1:
The segmentation of the fuse line into distinct, spaced-apart sub-fuse lines creates naturally separated cutting targets. This spatial separation simplifies simultaneous cutting control compared to cutting a continuous fuse line, as each segment can be addressed independently by the laser beam system, maintaining precision while improving productivity.
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 moisture penetration and cutting defects, enhancing the yield of fuse repair in semiconductor devices by minimizing the impact of corrosion and ensuring precise cutting without damaging the surrounding layers.
Implementation Method 1
cutting at least a portion of at least one sub-fuse line
Data Source
AI summary
A fuse of a fuse box includes a fuse line with a plurality of sub-fuse lines. A fuse cutting method involves selectively cutting sub-fuse lines of a fuse line.