Board Assembly Layout for Capacitive Connection Inspection
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Solution Overview
Problem
Conventional methods for connecting electronic circuit boards, such as using anisotropic conductive film (ACF), increase the probability of poor connections or disconnections, and there is a need for a simpler method to inspect the connection state of boards.
Innovation Solution
A board assembly design where signal lines on different boards are aligned orthogonally and additional signal lines are provided to facilitate capacitive coupling, allowing for inspection of connection states through capacitive coupling between these lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If crimping process using anisotropic conductive film is used to connect boards, then the height and pitch can be reduced, but the probability of poor connection or disconnection increases
Solution Approach 1:
The patent introduces test signal lines that are preliminarily configured alongside the main signal lines during board design. These test signal lines are used to inspect connection states before final assembly, allowing preventive detection of potential connection issues in the crimped regions without requiring additional post-assembly inspection steps
2Measurement precision
If conventional inspection methods are used to inspect signal line connections, then connection state can be checked, but the wiring structure becomes complex and error-prone
Solution Approach 1:
The patent merges the inspection function with the existing signal line structure by integrating test signal lines into the same board layers and routing paths as the main signal lines. This consolidation allows inspection functionality to be achieved without adding separate dedicated inspection wiring structures, thereby maintaining simplicity while enabling accurate connection state verification
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
Enables inspection of connection states with a simpler wiring structure, reducing the likelihood of poor connections and facilitating easier identification of disconnections.
Implementation Method 1
a second board including an additional signal line separated from the second signal line group in a thickness direction of the second board and extended across a second connection terminal group including a plurality of connection terminals connected to the second signal line group or the first signal line group
Data Source
AI summary
Provided is a board assembly including a first board including a first signal line group including signal lines extended in a first direction and lined up in a direction orthogonal to the first direction, and a second board including a second signal line group including signal lines extended in a second direction and lined up in a direction orthogonal to the second direction. The first board and the second board are fixed such that the signal lines included in the first signal line group and the second signal line group are connected in line, and the second board includes an additional signal line separated from the second signal line group in a thickness direction of the second board and extended across a second connection terminal group including a plurality of connection terminals connected to the second signal line group or the first signal line group.