Passive Component Layout for Reducing Substrate Eddy Current Loss
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Solution Overview
Problem
In semiconductor devices, high-frequency signals experience significant loss due to eddy currents induced in the semiconductor substrate by the conductivity of the substrate itself, leading to increased magnetic field interactions.
Innovation Solution
The implementation of an electronic component design that includes a semiconductor substrate with an insulator layer and a conductor layer, where conduction paths through the insulator layer electrically connect the conductor layer to the semiconductor substrate, thereby reducing eddy currents by allowing the substrate to be parallelly connected to the conductor layer, thus minimizing signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the semiconductor substrate is used as a base material for keeping the entire shape, then the structural integrity is maintained, but eddy currents are induced in the substrate by high-frequency currents, causing signal loss
Solution Approach 1:
An insulator layer is introduced as an intermediary between the conductor layer and the semiconductor substrate. This insulator layer prevents direct electrical contact, thereby blocking the induction of eddy currents in the substrate while still allowing the substrate to serve as the base material for structural integrity. The insulator layer mediates between the conflicting requirements of maintaining substrate stability and preventing energy loss.
2Loss of energy
If the conductor layer is electrically isolated from the semiconductor substrate, then eddy currents are reduced, but electrical connection between the conductor layer and substrate is lost
Solution Approach 1:
The insulator layer is not applied uniformly across the entire semiconductor substrate, but only in specific local regions where conductor layer formation is required. This local application of the insulator layer prevents eddy currents in areas where electrical connection is not needed, while maintaining electrical connection in areas where the conductor layer directly contacts the substrate. This resolves the contradiction by applying different electrical properties to different local regions.
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 design effectively reduces high-frequency signal loss by minimizing eddy currents in the semiconductor substrate, ensuring that the current flowing into the substrate is part of the intended path, rather than causing unnecessary loss.
Implementation Method 1
an insulator layer on the semiconductor substrate... the insulator layer includes a conduction path that passes through the insulator layer and electrically connects the conductor layer and the semiconductor substrate
Implementation Method 2
the insulator layer includes a conduction path that passes through the insulator layer and electrically connects the conductor layer and the semiconductor substrate
Implementation Method 3
when a high-frequency current flows into the passive component (a function portion) due to the conductivity of the semiconductor substrate, a magnetic field generated by the high-frequency current is applied to the semiconductor substrate, As a result, an eddy current flows into the semiconductor substrate
Data Source
AI summary
An electronic component that includes: a semiconductor substrate; an insulator layer on the semiconductor substrate; a lower electrode and an upper electrode that face the semiconductor substrate across the insulator layer; and a dielectric layer facing the semiconductor substrate across the insulator layer. The lower electrode, the upper electrode, and the dielectric layer configure a passive component. The insulator layer includes a conduction path passing through the insulator layer and electrically connecting the lower electrode and the semiconductor substrate.