Metal-oxide-metal Capacitor With Vertical Jogs for High Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MOM capacitors with flat metal electrodes in integrated circuits face limitations in increasing density and storage capacity within limited space, necessitating innovative designs for higher element density and storage capacity.
Innovation Solution
A three-dimensional MOM capacitor structure featuring alternately arranged metal stripes with metal jogs and plugs, allowing for increased surface area and electrical connectivity in multiple directions, thereby enhancing storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flat metal stripes are used for capacitor electrodes, then the structure is simple and easy to manufacture, but the surface area and storage capacity are limited
Solution Approach 1:
The patent transitions from two-dimensional flat metal stripes to three-dimensional structures by adding metal jogs that extend in the vertical direction. The metal jogs create additional surfaces for capacitance while maintaining compatibility with standard planar fabrication processes, effectively utilizing the third dimension to increase storage capacity without sacrificing ease of manufacture
Solution Approach 2:
The metal jogs are positioned within the interstitial spaces between adjacent metal stripes, creating a nested configuration where the jog structures fit into the available space without requiring additional lateral area. This nesting approach allows the capacitor to achieve higher density by utilizing the vertical space between existing planar features
2Device complexity
If metal stripes are arranged in one-dimension or two-dimension, then the layout is simple, but the element density is limited
Solution Approach 1:
The invention introduces vertical metal jogs that extend from the planar metal stripes into the third dimension. This dimensional transition allows the capacitor structure to achieve higher element density by utilizing vertical space, while the jogs are configured to align with existing planar features, maintaining relative layout simplicity
Solution Approach 2:
The metal electrode structure is segmented into multiple components: horizontal metal stripes and vertical metal jogs. This segmentation allows each component to serve a specific function - the stripes provide lateral connectivity and the jogs provide vertical surface area - while maintaining a modular structure that is relatively simple to fabricate using standard semiconductor processing techniques
3Quantity of substance
If the surface area between electrodes is increased, then the storage capacity is improved, but the device occupies more space
Solution Approach 1:
The patent increases the effective surface area between electrodes by adding vertical metal jogs that extend into the third dimension. This approach allows the capacitor to achieve higher storage capacity without proportionally increasing the lateral footprint, as the additional capacitance surface area is created in the vertical direction rather than requiring additional planar space
Data Source
AI summary
The present invention provides a metal-oxide-metal (MOM) capacitor including a first metal layer and a second metal layer. The first metal layer includes a plurality of first metal stripes and second metal stripes extending along a first direction and a plurality of first metal jogs and second metal jogs extending along a second direction. Each of the first metal jogs is connected to one of the first metal stripes and each of the second metal jogs is connected to one of the second metal stripes. The second metal layer includes a plurality of third metal stripes and fourth metal stripes extending along the first direction and includes a plurality of third metal jogs and fourth metal jogs. Each of the third metal jogs is connected to one of the third metal stripes and each of the fourth metal jogs is connected to one of the fourth metal stripes.