Wiring Substrate Folded Coupling for Resistance Adjustment
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Solution Overview
Problem
The existing lead wiring devices have limited adjustment range for wiring resistance, as the disposition of the coupling portion is restricted within the length of the external coupling terminal, which does not sufficiently expand the resistance value adjustment range.
Innovation Solution
A wiring substrate with a signal supply unit and multiple wirings, where coupling wirings are disposed in an intermediate region with different distances from the signal supply unit, and include a first coupling wiring folded back towards the signal supply unit, allowing for a wider adjustment range of wiring resistance by optimizing the configuration of conductive films and insulating films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the coupling portion is disposed within the length of the external coupling terminal, then the device structure is simple, but the adjustment range of wiring resistance is insufficient
Solution Approach 1:
The coupling wiring is divided into multiple segments including a first coupling wiring and a second coupling wiring, each serving distinct functions. The first coupling wiring connects the signal supply unit to the wiring region, while the second coupling wiring provides additional coupling paths, enabling independent adjustment of resistance values for each segment to achieve broader overall adjustment range.
Solution Approach 2:
The first coupling wiring is folded back toward the signal supply unit side, transitioning from a linear one-dimensional arrangement to a two-dimensional or three-dimensional configuration. This folding creates additional path length and adjustment possibilities without increasing the linear footprint, thereby expanding the resistance adjustment range while maintaining compact device dimensions.
2Adaptability or versatility
If the first coupling wiring is folded back towards the signal supply unit, then the adjustment range of wiring resistance is expanded, but the wiring path length increases
Solution Approach 1:
The coupling wiring is folded back in a compact configuration that utilizes vertical or lateral space rather than extending linearly. This dimensional transition allows the wiring to achieve longer effective path length for resistance adjustment while maintaining a small projected area and avoiding excessive linear extension that would consume additional device space.
Solution Approach 2:
The folded-back first coupling wiring is arranged to overlap or nest near the signal supply unit and other wiring structures. This nesting configuration allows the extended wiring path to be contained within or adjacent to existing device structures, effectively hiding the increased path length within the device footprint rather than requiring additional external space.
3Reliability
If multiple coupling wirings with different distances from the signal supply unit are used, then uniform signal transmission performance is achieved, but the device area increases
Solution Approach 1:
Different coupling wirings are assigned to different regions of the wiring substrate, with each coupling wiring optimized for its specific location and distance from the signal supply unit. This local optimization ensures that signal transmission performance is uniform across the entire device, as each region receives appropriately tailored coupling wiring configuration rather than a uniform one-size-fits-all approach.
Solution Approach 2:
The wiring substrate is divided into multiple regions with different coupling wirings disposed in each region. The first coupling wiring serves one region while the second coupling wiring serves another region, allowing independent optimization of each segment. This segmentation enables uniform signal transmission performance across different distances from the signal supply unit while confining the area required for each coupling wiring to its specific functional region.
Data Source
AI summary
A wiring substrate includes a signal supply unit, a plurality of wirings disposed in a wiring region in which an intermediate region is interposed between the wiring region and the signal supply units, and having different distances from the signal supply unit, and a plurality of coupling wirings disposed in the intermediate region, and coupled to the signal supply unit and the plurality of wirings, in which the plurality of coupling wirings includes a first coupling wiring coupled to a wiring having a short distance from the signal supply unit, and a second coupling wiring coupled to a wiring having a long distance from the signal supply unit among the plurality of wirings, and the first coupling wiring is folded back to the signal supply unit side in the middle of running from the signal supply unit to the wiring region.