Multi-Layer Filter Capacitor Structure for Displacement-Tolerant Symmetry
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Solution Overview
Problem
Conventional capacitors and filter structures in electrical circuits face challenges with high manufacturing tolerances, large space requirements, and asymmetry, which affect capacitance and symmetry, especially in multi-layer substrates.
Innovation Solution
The electrical circuit arrangement features conductive surfaces on a substrate with overlapping areas that remain constant during displacement, ensuring consistent capacitance and using integrated, concentrated capacitors and inductances to reduce space and improve symmetry, with capacitors formed by metallization and through contacts connecting multiple layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If discrete capacitors are used in circuits, then manufacturing precision and component tolerance can be achieved, but the space requirement increases and symmetry is compromised
Solution Approach 1:
The patent merges discrete capacitors into integrated capacitors formed directly on the substrate. Multiple conductive surfaces are combined to form capacitor structures with overlapping areas, integrating what were previously separate components into a unified substrate-based system, thereby reducing space while maintaining manufacturing precision
Solution Approach 2:
The patent transitions from planar discrete component layout to three-dimensional integrated capacitor structures with overlapping conductive surfaces on multiple substrate layers. This dimensional change allows capacitance to be achieved within the substrate volume rather than requiring additional planar space
2Area of stationary object
If strip conductors are used to realize inductances on multi-layer substrate, then space requirement is reduced, but manufacturing tolerance sensitivity increases
Solution Approach 1:
The patent introduces asymmetry in the capacitor design where one conductive surface is deliberately made smaller than the other. This asymmetric configuration creates a tolerance buffer that compensates for layer displacement, as the smaller surface remains fully overlapped even when misalignment occurs, thereby reducing sensitivity to manufacturing tolerances
Solution Approach 2:
The design incorporates a tolerance buffer by making one conductive surface smaller than the other, which beforehand cushions against the harmful effect of layer displacement. This pre-designed asymmetry ensures that even if layers shift during manufacturing, the overlapping area remains sufficient to maintain capacitance within acceptable tolerances
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 solution provides stable capacitance and reduced space requirements while ensuring symmetry, enhancing high-frequency behavior and manufacturing efficiency, and allows for compensation of production-determined tolerances, resulting in a compact and symmetrical filter structure.
Implementation Method 1
The conductive surfaces overlap in part and form an overlapping area. Up to a threshold value of the displacement, the resulting overlapping area is largely constant in the event of a displacement of the conductive surfaces relative to one another.
Implementation Method 2
The conductive surfaces are preferably formed by metallization of at least the two surfaces of at least one layer of the substrate.
Data Source
AI summary
An electrical circuit arrangement provides a substrate and at least two conductive surfaces. The substrate comprises at least one layer disposed between the conductive surfaces. The conductive surfaces form a capacitor and overlap in part and form an overlapping area. In the event of a displacement of the conductive surfaces relative to one another, the resulting overlapping area is largely constant up to a threshold value of the displacement.