Flexible Circuit Board Multi-Plane Signal Routing
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Solution Overview
Problem
Existing flexible circuit boards in wireless terminals face challenges in minimizing space occupation and radius of curvature, making it difficult to fold them for compact designs.
Innovation Solution
The flexible circuit board design includes multiple signal lines and dielectrics arranged in overlapping and non-overlapping configurations on different planes, with specific bending and extension portions, allowing for minimized space occupation and reduced curvature, enabling easier folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are arranged in a conventional configuration on the flexible circuit board, then the board occupies more space and has a larger radius of curvature, but the signal transmission function is maintained
Solution Approach 1:
The patent applies dimensionality change by arranging signal lines on multiple parallel planes (first plane, second plane, third plane) instead of a single plane. This spatial redistribution allows the flexible circuit board to occupy less area while maintaining signal transmission functionality, and enables easier folding by reducing the radius of curvature through optimized multi-plane configuration.
Solution Approach 2:
The signal lines are segmented into multiple parts (first part, second part) with different overlapping relationships. The first part of signal lines overlaps between planes to maintain electrical connection and signal integrity, while the second part extends without overlap to reduce overall space occupation and enable compact folding configuration.
2Area of stationary object
If signal lines are arranged to minimize space occupation, then the radius of curvature decreases making folding easier, but signal transmission quality may be compromised
Solution Approach 1:
By distributing signal lines across multiple parallel planes (first plane, second plane, third plane) and controlling their overlapping relationships, the invention maintains signal transmission reliability through proper electrical connection paths while minimizing the overall space occupation and radius of curvature of the flexible circuit board.
Solution Approach 2:
Different parts of the signal lines have different arrangements: the first part overlaps between planes to ensure reliable signal transmission and electrical connection, while the second part extends without overlap to reduce space occupation. This local differentiation of arrangement quality maintains both signal reliability and compactness.
Data Source
AI summary
A flexible circuit board according to an embodiment includes a first signal line extending on a first plane, a first dielectric extending in an extension direction of the first signal line while being in contact with the first signal line, a second signal line extending on a second plane parallel with the first plane, and a second dielectric extending in an extension direction of the second signal line while being in contact with the second signal line. The first signal line includes a first part overlapped with the second signal line and a second part not overlapped with the second signal line when viewed in a normal direction of the first plane, and the second signal line includes a first part overlapped with the first signal line and a second part not overlapped with the first signal line when viewed in the normal direction.