Semiconductor Cell Boundary Wall for Short-Free Metal Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reduction in size of semiconductor devices due to advanced manufacturing processes leads to insufficient space for metal routing, resulting in short-circuited issues between adjacent cells.
Innovation Solution
A method of manufacturing semiconductor devices that includes forming a separating wall above the boundary between two cells to prevent metal strips from contacting each other, thereby preventing short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the size of semiconductor device is reduced due to advanced manufacturing process, then the integration density is improved, but the space for metal routing becomes insufficient causing short-circuited issues between adjacent cells
Solution Approach 1:
The patent introduces a separating wall structure that divides the semiconductor device into distinct regions (first cell and second cell). This segmentation physically separates metal strips belonging to different cells, preventing short-circuits while maintaining high integration density. The separating wall acts as a structural divider that creates independent routing spaces for adjacent cells.
Solution Approach 2:
The patent resolves the routing space limitation by transitioning from two-dimensional planar routing to three-dimensional vertical routing. Metal strips are arranged in multiple layers (first metal layer and second metal layer) at different heights, allowing signals to route vertically above and below the separating wall. This dimensional change provides additional routing pathways without increasing the device footprint.
2Productivity
If cell height is reduced to increase integration density, then more cells can be packed in the same area, but adjacent cells encounter short-circuited issues due to insufficient separation space
Solution Approach 1:
The separating wall structure provides a physical segmentation between adjacent cells, ensuring precise spatial separation even when cell heights are reduced. The wall creates clearly defined boundaries that prevent metal strips from different cells from making unintended contact, maintaining manufacturing precision despite higher cell density.
Solution Approach 2:
The separating wall acts as an intermediary structure between adjacent cells. Rather than relying solely on the reduced cell height for separation, the wall provides an additional intermediate barrier that ensures precise cell separation. This mediator structure compensates for the reduced vertical space and maintains reliable electrical isolation between neighboring cells.
Data Source
AI summary
A method of manufacturing a semiconductor device, including: providing a substrate including a first cell and a second cell; forming a plurality of first metal strips on a first plane; forming a first trench over a boundary between the first cell and the second cell, wherein a bottom surface of the first trench is located on a second plane over the first plane; filling the first trench with a non-conductive material, resulting in a separating wall; and forming a plurality of second metal strips on a third plane over the second plane, wherein the plurality of second metal strips comprise a first second metal strip and a second second metal strip separated from each other by the separating wall.