Cover Tape Optical Structure for Clear CCD Component Imaging
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Solution Overview
Problem
Conventional cover tapes used for packaging electronic components have poor visibility, making it difficult to confirm the position, direction, and angle of components using a CCD camera, especially with the miniaturization of components, which requires improved image definition for precise mounting.
Innovation Solution
A cover tape with a substrate layer, a heat sealing layer, and an intermediate layer, where the transmitted image definition measured with an optical comb width of 0.5 mm is 30% or more, enhancing the visibility of electronic components through improved light transmission and reflection characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cover tape is used, then the packaging function is achieved, but the visibility and image definition of electronic components deteriorate
Solution Approach 1:
The patent changes the optical parameters of the cover tape by controlling the haze value (30-70%) and total light transmittance (70-90%) to optimize both visibility and image definition. This parameter optimization allows CCD cameras to capture clear images of miniaturized electronic components while maintaining packaging functionality.
Solution Approach 2:
The cover tape uses composite material structure combining multiple resin components with specific optical properties. The composite formulation achieves balanced light transmission characteristics that simultaneously provide sufficient transparency for visual confirmation and adequate image definition for CCD camera measurement.
2Productivity
If electronic components are miniaturized, then the productivity and integration density are improved, but the difficulty of detecting and measuring component position and orientation increases
Solution Approach 1:
The patent enables replacement of mechanical visual inspection with optical measurement systems. By optimizing the cover tape's optical properties (haze and transmittance), clear images can be captured through the tape, allowing CCD cameras to automatically detect component position, direction, and angle without direct visual confirmation.
3Loss of information
If the cover tape is made more transparent, then the visibility is improved, but the heat sealing performance and structural integrity may deteriorate
Solution Approach 1:
The patent optimizes the balance between optical parameters (transmittance and haze) and mechanical/thermal properties by carefully selecting resin types and additives. The total light transmittance is controlled at 70-90% while maintaining adequate heat sealing performance through appropriate material composition and thickness control.
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 improved cover tape ensures high-definition images of electronic components, allowing for precise confirmation of position, direction, and angle, facilitating accurate and efficient mounting processes.
Implementation Method 1
a transmitted image definition based on JIS K 7374, with an optical comb width set to 0.5 mm, is 30% or more
Data Source
AI summary
A cover tape for packing an electronic component includes: a substrate layer; a heat sealing layer placed on one surface side of the substrate layer; and an intermediate layer placed between the substrate layer and the heat sealing layer, and a transmitted image definition based on JIS K 7374, with an optical comb width set to 0.5 mm, is 30% or more.