Alternating Signal and Dummy Lines for PCB Miniaturization
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Solution Overview
Problem
The challenge is to miniaturize printed circuit boards while maintaining high signal quality and transmission speed, as the increased number of signal lines required for improved signal quality and speed necessitates more space, which is limited in compact electronic devices, and electromagnetic interference poses additional difficulties.
Innovation Solution
The solution involves a printed circuit board design with alternating signal and dummy lines across multiple layers, allowing for the same number of signal lines to be arranged in a smaller area by using 3-phase interfaces and electromagnetic shielding, reducing the distance between signal lines and minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of signal lines is increased to improve signal quality and transmission speed, then signal quality and transmission speed are improved, but the area required for wiring increases
Solution Approach 1:
The patent utilizes multiple wiring layers stacked vertically to arrange signal lines. By transitioning from a single-plane arrangement to a multi-layer three-dimensional structure, the patent increases the effective wiring capacity without proportionally increasing the board area, thus resolving the contradiction between signal quality (requiring more lines) and wiring area constraints.
Solution Approach 2:
The patent combines signal lines and dummy lines into integrated wiring patterns across multiple layers. By merging functional signal lines with non-functional dummy lines in a coordinated arrangement, the patent optimizes space utilization and maintains signal integrity while minimizing the required wiring area.
2Area of stationary object
If signal lines are arranged closer together to reduce area, then wiring area is reduced, but electromagnetic interference increases
Solution Approach 1:
The patent introduces dummy lines as intermediary elements between signal lines. These dummy lines act as electromagnetic shields or barriers, absorbing or redirecting electromagnetic interference while allowing signal lines to be positioned closer together. This mediator approach enables reduced wiring area without proportionally increasing electromagnetic interference.
Solution Approach 2:
The patent applies different wiring characteristics to different regions of the circuit board. By locally optimizing the arrangement of signal lines and dummy lines in specific areas, the patent achieves reduced electromagnetic interference in critical regions while maintaining compact overall wiring area. Each local region is configured according to its specific signal requirements and interference patterns.
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 enables efficient signal transmission with improved quality and speed in a compact form factor, maintaining performance comparable to larger boards while allowing for more signal lines in the same space, thus facilitating the miniaturization of electronic devices.
Implementation Method 1
a printed circuit board may include a plurality of signal lines for exchanging electric signals
Implementation Method 2
the at least one first signal line may be arranged to overlap, at least in part, the at least one second dummy line, and the at least one second signal line may be arranged to overlap, at least in part, the at least one first dummy line
Data Source
AI summary
According to various embodiments, a printed circuit board may include: a first wiring layer including at least one first signal line and at least one first dummy line; and a second wiring layer arranged on the first wiring layer and including at least one second signal line and at least one second dummy line, wherein when the printed circuit board is viewed from above, the at least one first signal line may be arranged to overlap, at least in part, the at least one second dummy line, and the at least one second signal line may be arranged to overlap, at least in part, the at least one first dummy line.