Planar Coil Isolator Structure for Edge Field Breakdown Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing isolators face challenges in preventing dielectric breakdown between the first and second planar coils due to electric field concentration, which can lead to instability and signal transmission issues.
Innovation Solution
The design incorporates a metal layer above the second planar coil, strategically positioned to reduce electric field intensity at the lower edge of the second planar coil, and optimizes the spacing and dimensions of the coils to minimize electric field concentration, thereby preventing dielectric breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the first planar coil and second planar coil are placed close to each other for compact design, then the device size is reduced, but electric field concentration occurs at the lower edge of the second planar coil causing dielectric breakdown
Solution Approach 1:
A metal layer is introduced as an intermediary component between the first planar coil and second planar coil. This metal layer strategically positioned at the lower edge of the second planar coil acts as a mediator to redistribute and reduce the electric field intensity, preventing dielectric breakdown while allowing the coils to remain in close proximity for compact device size.
Solution Approach 2:
The metal layer is selectively positioned only at the lower edge of the second planar coil where electric field concentration occurs. This local application of the metal layer addresses the specific problem area without requiring changes to the entire coil structure, maintaining compact overall dimensions while providing targeted protection against dielectric breakdown.
2Length of moving object
If the spacing between the first planar coil and second planar coil is reduced for miniaturization, then the device becomes more compact, but electric field intensity increases causing instability
Solution Approach 1:
The metal layer serves as an intermediary that stabilizes the electric field distribution between the closely spaced coils. By positioning the metal layer at the lower edge of the second planar coil, it mediates the electric field interaction, preventing excessive field intensity even when the coils are placed close together, thus maintaining signal transmission stability.
Solution Approach 2:
The metal layer changes the electric field distribution parameters in the critical region between the coils. It modifies the local electric field intensity and distribution pattern, allowing the coils to be spaced closer while maintaining stable signal transmission by preventing field concentration that would otherwise cause instability.
3Reliability
If the outer perimeter of the second planar coil is enlarged for better signal transmission, then the signal quality improves, but the electric field concentration at the lower edge increases causing breakdown
Solution Approach 1:
The metal layer converts the harmful effect of electric field concentration into a beneficial outcome. By strategically positioning the metal layer at the lower edge of the second planar coil, it utilizes the concentrated electric field to create a controlled distribution pattern that prevents dielectric breakdown, thereby allowing the coil outer perimeter to be enlarged for better signal transmission without suffering from the harmful concentration effect.
Solution Approach 2:
The metal layer acts as an intermediary that manages the electric field concentration caused by the enlarged coil perimeter. It mediates between the need for large coil dimensions for signal quality and the risk of field concentration, redistributing the field in a controlled manner that maintains both signal quality and prevents breakdown.
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 configuration effectively reduces electric field intensity at critical edges, enhancing the stability of signal transmission by preventing dielectric breakdown and ensuring reliable operation of the isolator.
Implementation Method 1
An isolator transmits a signal by utilizing the change of a magnetic field or an electric field in a state in which the current is blocked
Implementation Method 2
The first planar coil and the second planar coil are arranged to share a center in a direction perpendicular to a surface of the substrate. A distance from the center to an outer perimeter of the first planar coil is less than a distance from the center to an outer perimeter of the second planar coil
Data Source
AI summary
An isolator includes a substrate; a first planar coil provided above the substrate and along a surface of the substrate; a first insulating portion on the first planar coil; a second planar coil on the first insulating portion; and a metal layer above the first insulating portion. The first planar coil, the second planar coil, and the metal layer are arranged in a first direction perpendicular to the surface of the substrate. The first planar coil and the second planar coil each having a center and an outer perimeter in a second direction along the surface of the substrate. A distance in the second direction from the center of the first planar coil to the outer perimeter of the first planar coil is less than a distance in the second direction from the center of the second planar coil to the outer perimeter of the second planar coil.