Nested Capacitor Electrode Structure for Dense Semiconductor Integration
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Solution Overview
Problem
The challenge in semiconductor device manufacturing is to enhance the integration density of capacitors while maintaining operational reliability, as existing technologies face limitations in scaling down semiconductor devices due to finer patterns and structural defects in electronic devices.
Innovation Solution
The semiconductor device incorporates a unique configuration of capacitors with differently positioned dielectric layers, featuring lower and upper electrodes with specific shapes and extensions, allowing for a higher integration density by reducing the distance between capacitors without electrical contact, achieved through a method involving multiple insulation and conductive pattern formations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the distance between capacitors is reduced to increase integration density, then the integration density is improved, but the electrical contact and structural defects increase
Solution Approach 1:
The first electrode is nested within the second electrode structure. Specifically, the first electrode is positioned inside the hollow cylindrical region formed by the second electrode's second portion, allowing capacitors to be closely spaced without direct electrical contact while maintaining structural integrity and electrical isolation.
Solution Approach 2:
The dielectric layer serves as an intermediary between the first and second electrodes, providing electrical isolation while allowing the electrodes to be in close proximity. This mediator enables high integration density without compromising electrical contact reliability, as the dielectric prevents unwanted electrical contact while maintaining the capacitor's functional performance.
2Quantity of substance
If the capacitor size is reduced to increase integration density, then the integration density is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention transitions from planar capacitor arrangements to a three-dimensional configuration where electrodes are positioned at different heights and orientations. The first electrode extends in a first direction while the second electrode extends in a second direction perpendicular to the first, utilizing vertical stacking and spatial arrangement to achieve high integration density without requiring extremely fine lateral patterning.
Solution Approach 2:
Each electrode is divided into multiple portions with distinct functions and orientations. The first electrode has a first portion and a second portion extending in different directions, while the second electrode similarly has segmented portions. This segmentation allows for modular manufacturing and reduces the precision requirements for each individual pattern while achieving complex overall structures.
3Quantity of substance
If the electrode structures are made more complex to improve integration density, then the integration density is improved, but the device complexity increases
Solution Approach 1:
The electrode structures are designed to serve multiple functions simultaneously. The first electrode acts as both the bottom electrode for a first capacitor and the top electrode for a second capacitor. The second electrode similarly serves dual purposes. This multi-functionality reduces the total number of separate electrode structures needed, simplifying the overall device architecture while achieving high integration density.
Data Source
AI summary
A semiconductor device may include a first capacitor and a second capacitor located at a different height from the first capacitor. Each of the first and second capacitors includes a lower electrode, an upper electrode and a dielectric layer between the lower electrode and the upper electrode. A selected one of the lower and upper electrodes includes a first portion having a cylindrical shape and a second portion vertically extended from the first portion of the selected one. A selected another one of the lower and upper electrodes includes a first portion having a bar shape extended into the first portion of the selected one, a second portion vertically extended from the first portion of the selected another one, and a third having a cylindrical shape between the first portion and the second portion in the selected another one to surround the first portion of the selected one.