Capacitor Interface Layer Structure for Leakage Current Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reduction in size of semiconductor device patterns and connections leads to undesired electrical characteristics, such as loss of charge and changes in charges and data in adjacent components, necessitating the development of structures that reduce leakage currents in fine-sized capacitors.
Innovation Solution
An integrated circuit device is designed with a lower electrode on a substrate, an insulating support pattern, a dielectric film surrounding the electrodes and support pattern, and a high-k interface layer between the electrodes and dielectric film, which includes a zirconium oxide layer to prevent bridge formation and reduce leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of semiconductor device patterns and connections is reduced to increase space utilization, then space utilization is improved, but leakage current increases and electrical characteristics deteriorate
Solution Approach 1:
An insulating support pattern is introduced as an intermediary structure between adjacent lower electrodes. This support pattern physically separates the electrodes and prevents direct contact or bridging, thereby reducing leakage current while allowing the capacitor structure to be compact for high space utilization.
Solution Approach 2:
The insulating support pattern is strategically positioned only where needed - specifically supporting portions of the lower electrode that are prone to bridging with adjacent electrodes. This localized approach maintains electrical isolation without requiring complete restructuring of the entire device, thus achieving reliable electrical characteristics with minimal space overhead.
2Productivity
If fine-sized capacitors are used to increase density, then device density is improved, but leakage current increases
Solution Approach 1:
The insulating support pattern acts as a mediator that prevents direct electrical contact between adjacent fine-sized lower electrodes. By introducing this intermediate insulating structure, leakage current paths are blocked while maintaining the compact fine-pitch layout required for high device density.
Solution Approach 2:
The insulating support pattern segments the continuous space between adjacent lower electrodes into isolated regions. This segmentation prevents the formation of leakage current bridges between neighboring electrodes, enabling fine-sized capacitor design with reduced leakage current and improved energy retention.
Data Source
AI summary
An integrated circuit device includes: a lower electrode disposed on a substrate; an insulating support pattern supporting the lower electrode; a dielectric film surrounding the lower electrode and the insulating support pattern; a high-k interface layer arranged between the lower electrode and the dielectric film and between the insulating support pattern and the dielectric film, wherein the high-k interface layer contacts the insulating support pattern and includes a zirconium oxide layer; and an upper electrode disposed adjacent the lower electrode, wherein the high-k interface layer and the dielectric film are disposed between the upper electrode and the lower electrode.