Semiconductor Spacer Reducing Parasitic Capacitance
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Solution Overview
Problem
As semiconductor devices become increasingly integrated, they experience parasitic capacitance and leakage current, which degrade operating efficiency, necessitating a solution to minimize efficiency loss.
Innovation Solution
A semiconductor device design featuring a substrate with a bit line structure, trench, storage contact structure, and spacer structures to reduce parasitic capacitance and leakage current, including a silicide layer and storage pad, with additional spacers to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor devices are increasingly integrated to implement more devices on the same area, then device integration density is improved, but parasitic capacitance and leakage current increase which degrade operating efficiency
Solution Approach 1:
A spacer structure is introduced as an intermediary element between the bit line structure and the storage contact structure. This spacer acts as a mediator that physically separates the two conductive structures, thereby reducing parasitic capacitance between them while still allowing the device to function with high integration density.
Solution Approach 2:
The device structure is segmented into distinct functional regions separated by the spacer. By dividing the continuous conductive path into segmented sections (bit line structure, spacer, storage contact structure), the patent reduces unwanted electrical interactions between adjacent components while maintaining functional connectivity.
2Reliability
If the spacer structure is positioned to reduce parasitic capacitance, then operating efficiency is improved, but device complexity increases due to additional structural elements
Solution Approach 1:
The spacer structure serves multiple functions simultaneously: it acts as a physical separator to reduce parasitic capacitance, provides structural support for the storage contact structure, and defines the geometric configuration for optimal electrical performance. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The spacer structure is integrated with the bit line structure and storage contact structure as a unified assembly. Rather than being a separate add-on component, the spacer is formed as part of the overall device architecture, merging multiple structural elements into a cohesive design that reduces total device complexity.
Data Source
AI summary
A semiconductor device is provided. The semiconductor device includes a substrate a bit line structure disposed on the substrate, a trench adjacent to at least one side of the bit line structure, a storage contact structure disposed within the trench, and comprising a storage contact, a silicide layer, and a storage pad which are stacked sequentially. A spacer structure is disposed between the bit line structure and the storage contact structure.