Semiconductor Substrate Inductor Layout for LCD EMI Reduction
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Solution Overview
Problem
Electro-magnetic compatibility (EMC) standards for electronic devices, such as liquid crystal display panels, require reduction of radiation noise (EMI) in the AM frequency band from drive signals and power supplies, which existing technologies have not adequately addressed.
Innovation Solution
Incorporation of inductors on the semiconductor substrate and wiring substrates within the liquid crystal display device, specifically between lead lines, to act as EMI eliminating elements, reducing radiation noise while maintaining time constants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inductors are added to reduce radiation noise, then EMC compliance is improved, but device complexity increases
Solution Approach 1:
The patent combines the inductor structure with existing lead lines by forming the inductor directly on the lead line using a coil structure. This integration approach reduces device complexity by merging two separate components (inductor and lead line) into a single integrated structure, while still achieving the desired radiation noise reduction for EMC compliance.
2Object-affected harmful factors
If inductors are added to reduce radiation noise, then radiation noise is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates the inductor structure during the existing manufacturing process by forming the coil structure on the lead line before final assembly. This preliminary action allows the inductor to be integrated into the manufacturing flow without requiring separate complex manufacturing steps, thereby reducing radiation noise while minimizing increases in manufacturing complexity.
3Object-affected harmful factors
If inductors are added between lead lines, then radiation noise is reduced, but area of the substrate increases
Solution Approach 1:
The patent implements the inductor as a coil structure that is nested around or along the lead line path. This nesting approach allows the inductor to occupy the same spatial region as the existing lead lines rather than requiring additional substrate area, thereby reducing radiation noise while minimizing the increase in substrate area.
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
The implementation effectively reduces radiation noise in liquid crystal display devices, enhancing EMC compliance without compromising time constants or increasing manufacturing costs.
Implementation Method 1
a first inductor provided above the insulating substrate and electrically connected between the first lead line and the second lead line
Data Source
AI summary
According to one embodiment, a semiconductor substrate includes an insulating substrate, a plurality of gate lines, a plurality of source lines, a first electronic circuit formed above the insulating substrate, a first lead line provided with a first signal, a second lead line electrically connected to the first electronic circuit, and a first inductor. The first inductor is provided above the insulating substrate and is electrically connected between the first lead line and the second lead line.