Boron-Containing Insulating Pattern for IC Parasitic Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As IC devices downscale, the narrow distance between interconnection lines increases parasitic capacitance and the likelihood of electrical shorts, compromising reliability.
Innovation Solution
Incorporating a boron-containing insulating pattern, such as a silicon boron nitride film, between contact plugs and conductive lines to reduce parasitic capacitance and electrical shorts, while maintaining a miniaturized unit cell size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the distance between interconnection lines is reduced to downscale IC devices, then the unit cell size is reduced, but the parasitic capacitance between contact plugs and interconnection lines increases
Solution Approach 1:
An insulating pattern is introduced as an intermediary element positioned between the contact plug and the interconnection line. This mediator reduces the parasitic capacitance by providing electrical isolation, allowing the contact plug to maintain close proximity to the interconnection line for small unit cell size while the insulating pattern prevents excessive capacitance formation
Solution Approach 2:
The insulating pattern is selectively applied only in the region where the contact plug contacts the interconnection line, rather than uniformly across the entire structure. This localized approach reduces parasitic capacitance at the critical interface while minimizing the impact on overall device area and maintaining compact unit cell dimensions
2Area of moving object
If the distance between interconnection lines is reduced to downscale IC devices, then the unit cell size is reduced, but the likelihood of electrical short between contact plug and conductive region increases
Solution Approach 1:
The insulating pattern serves as a protective intermediary barrier between the conductive contact plug and the conductive interconnection line. This mediator prevents direct electrical contact that would cause short circuits, while still allowing the structure to maintain compact dimensions for downscaling
Solution Approach 2:
The insulating pattern is positioned in advance at the potential short-circuit interface between the contact plug and conductive region. This prior protective measure prevents electrical shorts before they can occur, ensuring reliability in the miniaturized structure where components are in close proximity
3Reliability
If a boron-containing insulating pattern is added to reduce parasitic capacitance, then reliability is improved, but device complexity increases
Solution Approach 1:
The boron-containing insulating pattern is applied only at the specific location where the contact plug interfaces with the interconnection line, rather than throughout the entire device. This localized application reduces parasitic capacitance at the critical point while minimizing the increase in overall device complexity
Solution Approach 2:
A boron-containing compound (such as silicon boron nitride or boron oxide) is used to form the insulating pattern. These composite materials provide high insulating performance and low dielectric constant properties that effectively reduce parasitic capacitance, achieving reliability improvement without requiring overly complex structural designs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces parasitic capacitance and the risk of electrical shorts, enhancing the reliability of IC devices by utilizing a boron-containing insulating pattern with a low dielectric constant, thereby improving their performance and stability.
Implementation Method 1
a boron-containing insulating pattern between the lower portion of the contact plug and the direct contact
Data Source
AI summary
Integrated circuit (IC) devices are provided. An IC device includes a substrate including an active region. The IC device includes a bit line on the substrate. The IC device includes a direct contact connected between the active region and the bit line. The IC device includes a contact plug on the substrate. Moreover, the IC device includes a boron-containing insulating pattern between the contact plug and the direct contact.