Shaped Metal Edge for Galvanic Isolators With Lower Electric Field Peaks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated circuits face limitations in operating voltage due to electric discharge between closely spaced conductive lines, with conventional fabrication processes struggling to shape conductive lines effectively to reduce electric field magnitudes near sharp corners and edges.
Innovation Solution
The use of lithographically defined and electroplated conductive lines with rounded, curved, or sloped surfaces to increase the radius of curvature of corners and side surfaces, reducing the maximum electric field magnitude by incorporating electric field-reducing structures such as rounded corners, curved side surfaces, and stepped or sloped side surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fabrication processes are used to form conductive lines, then manufacturing simplicity is maintained, but electric field hotspots occur at sharp corners and edges limiting operating voltage
Solution Approach 1:
The patent applies curvature by forming conductive lines with rounded corners and edges instead of sharp angles. The side surfaces are shaped with continuous curvature to eliminate field concentration points, directly reducing electric discharge risk while maintaining fabrication feasibility through specialized molding or deposition techniques.
Solution Approach 2:
The patent changes the geometric parameters of conductive lines by controlling the radius of curvature at corners and the profile of side surfaces. By adjusting these parameters during fabrication, the electric field distribution is optimized to prevent hotspots, thereby improving reliability without requiring fundamentally new manufacturing processes.
2Reliability
If conductive lines with sharp corners and edges are used, then manufacturing simplicity is maintained, but maximum electric field magnitude increases causing breakdown
Solution Approach 1:
The patent transforms the geometry of conductive lines from sharp-edged to continuously curved surfaces. By rounding all corners and creating smooth side surfaces with controlled curvature radii, the design eliminates geometric features that concentrate electric fields, thereby enabling higher operating voltages without breakdown.
Solution Approach 2:
The patent modifies the geometric parameters of conductive lines by specifying minimum radius of curvature values for corners and controlling the slope angles of side surfaces. These parameter changes redistribute the electric field more uniformly, preventing the formation of high-field regions that would cause dielectric breakdown.
3Reliability
If lithographically defined and electroplated conductive lines with rounded surfaces are used, then electric field hotspots are minimized, but manufacturing complexity increases
Solution Approach 1:
The patent implements rounded surfaces through lithographic patterning followed by electroplating, where the lithography step defines the curved footprint and the electroplating process builds up the conductive material conformally. This combination achieves the desired curved geometry that minimizes electric field hotspots while using established semiconductor manufacturing techniques.
Solution Approach 2:
The patent combines lithographic definition with electroplating in an integrated process flow. The lithography step creates the patterned mask with rounded features, and the electroplating step deposits the conductive material to form the final shaped conductive lines. Merging these two processes achieves complex curved geometries without requiring additional specialized equipment or steps.
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 approach enhances the operating voltage of integrated circuits by minimizing electric field hotspots and reducing the likelihood of electric discharge, allowing for higher voltage operation without breakdown.
Implementation Method 1
The use of lithographically defined and electroplated conductive lines with rounded, curved, or sloped surfaces
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
The disclosed technology generally relates to lithographically defined conductive lines for integrated circuit devices formed by plating, and more particularly to conductive lines shaped to reduce the magnitude of electric field in the electric field distributions around conductive lines of integrated and monolithic transformers and isolators.