Electrical connection apparatus
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Solution Overview
Problem
The instability of electrical connections between circuit boards with varying degrees of flatness leads to gaps and deteriorated connectivity in electrical connection apparatuses used for inspecting objects.
Innovation Solution
An electrical connection apparatus featuring a wiring sheet with flexible first and second connection portions, and claw portions projecting obliquely, which connects internal wiring of a wiring board and a printed board, stabilizing the electrical connection by mitigating irregularities and maintaining connectivity despite differences in flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple circuit boards with different flatness are stacked to form the electrical connection apparatus, then the apparatus can perform various electrical inspections, but gaps are formed between the circuit boards and electrical connection stability deteriorates
Solution Approach 1:
The patent introduces a flexible wiring sheet with flexibility between the wiring board and the printed board. This flexible component can deform to accommodate flatness differences between the rigid circuit boards, maintaining continuous electrical connection without gaps. The wiring sheet acts as a compliant intermediary that bridges the flatness mismatch while preserving signal integrity for inspection operations.
Solution Approach 2:
The flexible wiring sheet serves as an intermediary element between the wiring board and printed board. It mediates the flatness discrepancy by deforming to match the surface contours of both boards, ensuring stable electrical connection. The claw portions on the wiring sheet further enhance this mediating function by providing mechanical interlocking and consistent contact pressure across the connection interface.
2Strength
If rigid circuit boards are used to ensure structural stability, then mechanical strength is maintained, but gaps form between boards with different flatness and electrical connection stability deteriorates
Solution Approach 1:
The flexible wiring sheet provides a compliant connection path between rigid circuit boards. Its flexibility allows it to conform to surface irregularities and maintain contact pressure despite flatness variations, while the rigid boards preserve structural stability. This combination enables both mechanical strength and electrical connection reliability to coexist.
Solution Approach 2:
The electrical connection apparatus is segmented into distinct functional layers: rigid circuit boards for structural support and signal routing, and a flexible wiring sheet for accommodation of flatness differences. This segmentation allows each component to optimize its specific function without compromising the other, with the flexible layer specifically addressing the flatness mismatch issue.
3Reliability
If the wiring sheet is made flexible to accommodate flatness differences, then electrical connection stability is improved, but manufacturing complexity increases
Solution Approach 1:
The flexible wiring sheet uses thin-film construction with flexible substrates and conformal coating layers to achieve flexibility without excessive complexity. The multi-layer thin-film structure provides both mechanical compliance and electrical conductivity while maintaining a compact profile. This approach balances flexibility requirements with manufacturing feasibility.
Solution Approach 2:
The wiring sheet employs composite material construction combining flexible substrates, conductive layers, and insulating coatings. This composite structure integrates multiple functions (flexibility, conductivity, isolation) into a single component, reducing overall device complexity while achieving the required electrical connection stability. The claw portions are formed as integrated features of this composite structure.
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 solution ensures stable electrical connections and enhances measurement accuracy by maintaining connectivity and mitigating irregularities, allowing for high-frequency measurements and accurate inspection of objects.
Implementation Method 1
a wiring sheet with flexibility including a first connection portion arranged on a first sheet surface, a second connection portion arranged on a second sheet surface
Data Source
AI summary
An electrical connection apparatus includes a probe, a wiring board including a first electrode electrically connected to the probe, internal wiring, and a second electrode electrically connected to the first electrode via the internal wiring, and a wiring sheet with flexibility including a first connection portion arranged on a first sheet surface, a second connection portion arranged on a second sheet surface, and an internal circuit electrically connected to at least any one of the first connection portion and the second connection portion. A claw portion with conductivity projecting obliquely relative to a surface perpendicular to a thickness direction of the wiring sheet is arranged on at least any one of the first connection portion and the second connection portion. The internal wiring of the wiring board and the internal circuit of the wiring sheet are electrically connected via the claw portion.