Oblique Flexible Wiring Board Connection for Dense High-Frequency Routing
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Solution Overview
Problem
Existing connection systems face challenges in arranging a high density of leads in flexible wiring boards both parallel and perpendicular to printed circuit boards, leading to complex connection configurations that deteriorate high-frequency characteristics.
Innovation Solution
The connection system comprises a first and second flexible wiring board, each with a base film, wires, and electrodes, coupled to connectors such that their main surfaces intersect the connector's surface obliquely, allowing for high-density wire arrangement without compromising high-frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If leads are arranged in multiple directions to increase density, then wire arrangement density is improved, but connection configuration complexity increases
Solution Approach 1:
The patent transitions from traditional parallel arrangement of flexible wiring boards to an oblique arrangement where the main surfaces of the flexible wiring boards intersect the connector surface at oblique angles. This dimensional change enables wires to be arranged in multiple directions (first direction along first flexible wiring board, second direction along second flexible wiring board) without increasing connection complexity, as both boards connect to the same connector body in a unified configuration.
2Quantity of substance
If complex connection configurations are used to arrange leads densely, then wire arrangement density is improved, but high-frequency characteristics deteriorate
Solution Approach 1:
By arranging the first and second flexible wiring boards at oblique angles to the connector surface, the patent achieves dense wire arrangement in multiple directions while maintaining simple, direct electrical connections through the connector. This oblique arrangement geometry allows signals to transmit along shorter, more direct paths compared to complex folded or layered configurations, thereby preserving high-frequency characteristics while achieving high wire density.
3Device complexity
If multiple flexible wiring boards are arranged parallel to printed circuit board, then connection simplicity is maintained, but wire arrangement density is limited
Solution Approach 1:
The patent abandons the traditional parallel arrangement of flexible wiring boards relative to the printed circuit board and instead positions them at oblique angles where their main surfaces intersect the connector surface. This dimensional change allows wires from different flexible wiring boards to be arranged in different directions (first direction and second direction) radiating from the connector, dramatically increasing wire arrangement density while maintaining connection simplicity through a unified connector body.
4Ease of manufacture
If traditional horizontal connection is used, then manufacturing ease is maintained, but connection system height is increased
Solution Approach 1:
The patent transitions from horizontal connection configurations to an oblique arrangement where flexible wiring boards connect at angles to the connector. This dimensional change allows the connection system to be compacted in the height direction, as the oblique arrangement enables better spatial utilization and reduces the vertical footprint compared to traditional horizontal extensions, while remaining compatible with standard manufacturing processes.
Data Source
AI summary
A connection system includes a first flexible wiring board and a board assembly. The first flexible wiring board has a first base film, first wires, and first electrodes. The first base film includes a first main surface extending along a first direction. The first electrodes are each electrically connected to a corresponding one of the first wires. The board assembly has a board body and a first connector. The board body includes a third main surface. The third main surface extends along a third direction. The first connector includes first conductors. The first flexible wiring board is coupled to the first connector such that the first direction intersects the third direction obliquely. Each of the first electrodes is configured to be electrically connected to a corresponding one of the first conductors when the first flexible wiring board is coupled to the first connector.