Semiconductor Device Dummy Pattern Parasitic Capacitance
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Solution Overview
Problem
As semiconductor devices become more finely integrated, the increased parasitic capacitance due to narrowed metal interconnection pitches reduces operating speeds, and existing solutions for low-resistance metal interconnections and low-dielectric constant dielectrics have not adequately addressed this issue.
Innovation Solution
A semiconductor device design that includes a substrate with distinct regions and buffer regions, featuring conductive lines, an inductor, and dummy patterns, where the dummy patterns are strategically placed to minimize parasitic capacitance by maintaining a closer proximity to conductive lines than to the inductor, thereby reducing capacitance-inducing interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal interconnection pitches are narrowed to achieve fine integration, then device integration density is improved, but parasitic capacitance increases and operating speed decreases
Solution Approach 1:
A dummy pattern is introduced as an intermediary element between the conductive line and the inductor. This dummy pattern acts as a mediator to manage the electromagnetic field distribution and reduce parasitic capacitance coupling between the conductive line and inductor, thereby maintaining operating speed while preserving fine integration benefits
Solution Approach 2:
The harmful parasitic capacitance effect is extracted and managed by isolating the interaction between conductive line and inductor through the dummy pattern. The dummy pattern effectively separates the electromagnetic coupling path, removing the harmful capacitive effect while maintaining the narrowed pitch structure
2Area of stationary object
If conductive components are placed closer together to reduce device area, then area efficiency is improved, but parasitic capacitance increases
Solution Approach 1:
The dummy pattern serves as an intermediary structure that enables closer placement of conductive components while mitigating parasitic capacitance. By positioning the dummy pattern between the conductive line and inductor, the design achieves compact layout without suffering from increased capacitive coupling
Solution Approach 2:
The dummy pattern is strategically placed only in specific locations where parasitic capacitance needs to be managed. This localized approach allows area-efficient design by applying the capacitance-reduction structure only where needed, rather than uniformly across the entire device
Data Source
AI summary
A semiconductor device includes a substrate having a first region, a second region, a first buffer region, and a second buffer region. A plurality of conductive lines is disposed on the first region of the substrate. An inductor is disposed on the second region of the substrate, and a dummy pattern is disposed on the first buffer region of the substrate. The first buffer region is provided between the first region and the second region. The second buffer region is provided between the first buffer region and the second region.