Low Field Contour High Voltage Conductor Design
Solution Overview
Problem
High voltage conductors in microelectronic devices generate unwanted leakage currents and dielectric breakdown due to high electric fields at their corners, leading to degradation and failure, and existing designs often result in a loss of usable area.
Innovation Solution
The introduction of a microelectronic device with high voltage conductors featuring a low field contour design, incorporating offsets at specific lateral distances to increase separation and reduce electric fields, thereby maximizing usable area and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If corners of high voltage conductors are rounded to reduce electric fields, then leakage currents and dielectric breakdown are reduced, but usable area of the conductors is lost
Solution Approach 1:
The patent applies different offset distances at different locations along the conductor. The first offset (19-28% of lateral separation) is applied at the end of the conductor where electric field concentration is highest, while smaller offsets (9-14% and 4-6%) are applied at intermediate positions. This localized differentiation reduces electric fields at critical points while preserving usable area in less critical regions.
Solution Approach 2:
The patent changes the geometric parameters of the conductor by introducing specific offset distances measured as percentages of the lateral separation. The first offset is 19 percent to 28 percent of the lateral separation, the second offset is 9 percent to 14 percent, and the third offset is 4 percent to 6 percent. These parameter changes create a low field contour that reduces electric field concentration while maintaining adequate conductor area.
2Area of moving object
If high voltage conductors are designed with straight edges to maximize usable area, then conductor area is maximized, but high electric fields at corners cause leakage currents and dielectric breakdown
Solution Approach 1:
The patent introduces localized offsets at specific positions along the conductor rather than uniformly rounding all corners. The first offset at the end of the conductor (19-28% of lateral separation) addresses the most critical electric field concentration point, while smaller offsets at intermediate positions provide additional protection where needed without unnecessarily reducing area in less critical regions.
Solution Approach 2:
The patent creates a curved low field contour by introducing offsets that round the corners of the high voltage conductor. This curvature eliminates sharp edges that would concentrate electric fields, replacing them with gradual transitions that distribute the electric field more evenly while preserving most of the conductor's usable area.
3Reliability
If uniform offset is applied along the entire conductor to reduce electric fields, then electric field distribution is improved, but excessive usable area is lost
Solution Approach 1:
The patent applies different offset magnitudes at different locations along the conductor. The first offset (19-28% of lateral separation) is applied at the end of the conductor where electric field concentration is most severe, while the second offset (9-14%) and third offset (4-6%) are applied at intermediate positions. This graduated approach provides effective electric field control where needed while minimizing area loss in less critical regions.
Data Source
AI summary
A microelectronic device includes a first conductor and a second conductor, separated by a lateral spacing. The first conductor has a low field contour facing the second conductor. The low field contour has offsets from a tangent line to the first conductor on the low field contour. Each of the offsets increases a separation of the high voltage conductor from the low voltage conductor. A first offset, located from an end of the high voltage conductor, at a first lateral distance of 25 percent of the minimum separation, is 19 percent to 28 percent of the minimum separation. A second offset, located at a second lateral distance of 50 percent of the minimum separation, is 9 percent to 14 percent of the minimum separation. A third offset, located at a third lateral distance of 75 percent of the minimum separation, is 4 percent to 6 percent of the minimum separation.