Semiconductor Interconnect Layout for Dielectric Breakdown Resistance
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Solution Overview
Problem
The reduction in size of semiconductor interconnect structures leads to thinner dielectric layers, increasing the likelihood of dielectric breakdown and reducing the reliability of the semiconductor interconnect structure.
Innovation Solution
The semiconductor interconnect structure includes a design where the lower surface of one conductive element is higher than the lower surface of another, resulting in varying thickness of the dielectric material between these elements, which enhances dielectric breakdown resistance while maintaining high operating speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the dielectric layer thickness is reduced to scale down the semiconductor interconnect structure, then the operating speed is improved, but the dielectric breakdown resistance deteriorates
Solution Approach 1:
The patent applies local quality by creating a dielectric layer with non-uniform thickness, where the thickness varies at different locations. Specifically, the dielectric layer has a first thickness in a first region and a second thickness in a second region, allowing different areas to have optimized properties for their specific functions while maintaining overall structure integrity.
Solution Approach 2:
The patent transitions from a uniform one-dimensional thickness parameter to a two-dimensional thickness distribution. By introducing spatial variation in the dielectric layer thickness across different regions, the design adds a dimensional aspect to the thickness parameter, enabling simultaneous optimization of speed and reliability through location-specific thickness values.
2Volume of moving object
If the dielectric layer thickness is reduced, then the device size is scaled down, but the manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality by specifying different thickness values for different regions of the dielectric layer. This allows the manufacturing process to target specific thickness ranges in different areas, making the precision requirements more manageable by dividing the structure into regions with optimized dimensional specifications.
Solution Approach 2:
The patent segments the dielectric layer into multiple regions (first region and second region) with different thickness characteristics. This segmentation approach divides the manufacturing challenge into smaller, more controllable portions, where each region can be processed and controlled independently to achieve the desired thickness precision.
Data Source
AI summary
A semiconductor interconnect structure and a method for manufacturing the same are provided. The semiconductor interconnect structure includes a first conductive element, a dielectric layer on the first conductive element, a second conductive element in the dielectric layer, a via element in the dielectric layer and extending from the first conductive element to the second conductive element, and a third conductive element in the dielectric layer. A lower surface of the third conductive element is higher than a lower surface of the second conductive element.