Composite Dielectric Interconnect Layout for Lower Parasitic Capacitance
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Solution Overview
Problem
Challenges exist in scaling down semiconductor devices to improve quality, yield, performance, and reliability while reducing complexity, particularly due to issues with parasitic capacitance.
Innovation Solution
The semiconductor device incorporates a composite dielectric layer with manganese-containing interconnect structures in pattern-sparse and pattern-dense regions, utilizing dielectric layers with lower dielectric constants to reduce parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor devices are scaled down to improve computing power and performance, then device density and computing capability are improved, but parasitic capacitance increases and manufacturing complexity increases
Solution Approach 1:
The patent applies different dielectric materials with different dielectric constants to different regions of the interconnect structure. Specifically, a first dielectric material with a first dielectric constant is used in a first region, while a second dielectric material with a second dielectric constant is used in a second region. This local differentiation allows optimization of parasitic capacitance in specific areas while maintaining overall device performance, directly addressing the harmful effect of parasitic capacitance that increases with scaling.
Solution Approach 2:
The patent employs composite dielectric structures combining multiple dielectric materials with different properties. The interconnect structure includes regions with different dielectric constants, creating a composite dielectric system. This composite approach enables tailored electrical characteristics in different regions, effectively managing parasitic capacitance while supporting continued device scaling for improved computing power.
2Productivity
If semiconductor devices are scaled down to improve performance, then device density is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the interconnect structure into multiple regions with different dielectric materials. The structure is divided into a first region with a first dielectric material and a second region with a second dielectric material. This segmentation allows independent optimization of each region's electrical characteristics and simplifies the manufacturing process by enabling region-specific processing and material deposition, thereby reducing overall manufacturing complexity despite increased device density.
Solution Approach 2:
By assigning different dielectric materials to different regions, the patent enables localized optimization without requiring complete redesign of the entire interconnect structure. This local quality approach allows manufacturers to target specific regions for process optimization, reducing the complexity burden that would otherwise accompany full-device scaling.
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
This design enhances semiconductor performance by minimizing parasitic capacitance, thereby improving overall device efficiency and reliability.
Implementation Method 1
Challenges exist in scaling down semiconductor devices to improve quality, yield, performance, and reliability while reducing complexity, particularly due to issues with parasitic capacitance
Data Source
AI summary
The present application discloses a semiconductor device and a method for fabricating the semiconductor device. The semiconductor device includes a first interconnect structure disposed in a semiconductor substrate, first and second dielectric layers disposed over the semiconductor substrate, a second interconnect structure disposed in the first and second dielectric layers, and a third interconnect structure disposed in the semiconductor substrate. The first interconnect structure includes a first conductive line and a first manganese-containing layer. The second interconnect structure includes a second conductive line and a second manganese-containing layer. The third interconnect structure includes a third conductive line and a third manganese-containing layer. The third manganese-containing layer of the third interconnect structure and the first manganese-containing layer of the first interconnect structure are made of a same material.