Magnetic Element Isolation Layout to Prevent Delamination
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Solution Overview
Problem
The challenge in semiconductor manufacturing lies in forming reliable semiconductor devices at smaller sizes due to increased complexity and difficulty in fabrication processes as feature sizes decrease, leading to issues such as peeling, delamination, and damage to interconnection structures during the formation of magnetic elements.
Innovation Solution
A method involving the formation of an adhesive layer between the interconnection structure and magnetic elements, followed by a patterned isolation element and conductive lines, with a dielectric layer to reduce stress and prevent damage, ensuring the quality and reliability of the semiconductor device structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If feature sizes continue to decrease to increase functional density, then productivity and production efficiency are improved, but manufacturing complexity and fabrication difficulty increase
Solution Approach 1:
The patent segments the fabrication process into distinct stages with specific protective measures applied at each stage. The adhesive layer is applied selectively to specific regions (first region, second region, third region) rather than uniformly across the entire substrate, allowing complex multi-layer structures to be built up systematically while maintaining manufacturing control
Solution Approach 2:
The adhesive layer is applied in advance before forming the magnetic element and interconnection structures. This preliminary action ensures that when subsequent processing steps occur, the adhesive layer is already in position to prevent peeling and delamination, addressing manufacturing reliability issues before they can arise during device operation
2Reliability
If adhesive layer is applied over entire substrate to prevent peeling, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The adhesive layer is applied selectively to specific local regions (first region, second region, third region) rather than uniformly across the entire substrate. Each region receives adhesive treatment based on its specific structural requirements, maintaining reliability where needed while simplifying manufacturing in areas where adhesive application is not necessary
Solution Approach 2:
The substrate is divided into multiple distinct regions with different adhesive application requirements. This segmentation allows the manufacturing process to target adhesive application only where structural integrity is needed, reducing overall processing complexity compared to applying adhesive across the entire substrate
Data Source
AI summary
A semiconductor device structure is provided. The semiconductor device structure includes a substrate and a magnetic element over the substrate. The semiconductor device structure also includes an isolation element over the magnetic element. The isolation element is wider than the magnetic element along a first direction, and the magnetic element is wider than the isolation element along a second direction. The semiconductor device structure further includes a conductive feature over the isolation element.