Card Medium Assembly for Precise Exposed Component Positioning
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Solution Overview
Problem
Existing card-type media face issues with precise positioning of exposed components like contact terminals and fingerprint sensors due to relative displacement caused by intermediate spacers during assembly.
Innovation Solution
A card-type medium structure that uses different joint-forming temperatures for conductive joining materials to stabilize the positioning of exposed components, such as fingerprint sensors and contact terminals, by first joining the component and spacer with a higher temperature material and then the spacer and circuit board with a lower temperature material, minimizing relative displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If intermediate spacers are used to attach exposed components to the circuit board, then vertical alignment is achieved, but positioning precision deteriorates due to relative displacement between components and spacers
Solution Approach 1:
The patent applies preliminary action by pre-attaching the exposed component to the intermediate spacer using a first conductive joining material before attaching the spacer to the circuit board. This sequence ensures the component is fixed to the spacer in advance, preventing relative displacement during subsequent mounting operations and achieving both vertical alignment and positioning precision.
Solution Approach 2:
The patent utilizes parameter changes by employing conductive joining materials with different joint-forming temperatures. The first joining material has a higher joint-forming temperature than the second, allowing the component-spacer attachment to be completed at a temperature that won't cause displacement, while the spacer-board attachment occurs at a lower temperature that preserves the already-established positioning.
2Adaptability or versatility
If different soldering portions are used to assemble the card, then assembly flexibility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies universality by using the same intermediate spacer structure for both vertical alignment and positioning functions. The spacer serves multiple purposes: providing height for proper component exposure, maintaining precise positioning through pre-attachment, and enabling flexible assembly through standardized conductive joining material interfaces, thereby reducing overall manufacturing complexity.
3Shape
If exposed components are attached with intermediate spacers, then vertical positioning is achieved, but component stability deteriorates due to potential displacement
Solution Approach 1:
The patent applies preliminary action by pre-attaching the exposed component to the intermediate spacer using a first conductive joining material before attaching the spacer to the circuit board. This sequence ensures the component is fixed to the spacer in advance, preventing relative displacement during subsequent mounting operations and achieving both vertical alignment and positioning precision.
Solution Approach 2:
The patent utilizes parameter changes by employing conductive joining materials with different joint-forming temperatures. The first joining material has a higher joint-forming temperature than the second, allowing the component-spacer attachment to be completed at a temperature that won't cause displacement, while the spacer-board attachment occurs at a lower temperature that preserves the already-established positioning.
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 method allows for precise and stable placement of exposed components on the circuit board, reducing the risk of displacement and electrical short circuits, while minimizing the number of components and manufacturing steps.
Implementation Method 1
where a joint-forming temperature of the first conductive joining material is higher than a joint-forming temperature of the second conductive joining material
Data Source
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AI summary
A card-type medium according to an aspect of the present invention includes: a card body; an exposed component that is accommodated inside an opening formed in a front surface of the card body and is disposed so as to be partially exposed on the front surface; and a circuit board that is embedded in the card body and to which the exposed component is attached. The exposed component includes a first exposed component that is attached to the circuit board with an intermediate spacer interposed therebetween. The first exposed component and the intermediate spacer are joined together by a first conductive joining material. The circuit board and the intermediate spacer are joined together by a second conductive joining material. A j oint-forming temperature of the first conductive joining material and a j oint-forming temperature of the second conductive joining material are different from each other.