Electronic Component Flatness Detection Using Virtual Plane Reference
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Solution Overview
Problem
Existing methods for detecting the flatness of electronic components are prone to inaccuracies due to tilting caused by dust or other contaminants, and three-dimensional measurement devices using glass substrates face limitations in reliability and device miniaturization.
Innovation Solution
A flatness detection method and device that captures data from multiple reference points on a component, creates a virtual plane, determines its validity, and uses this plane to accurately detect the component's flatness, regardless of measurement conditions, by acquiring position and height information, creating a virtual plane based on selected points, and determining its validity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequent cleaning of inspection line is performed to eliminate dust, then measurement accuracy is improved, but inspection efficiency is reduced due to time consumption
Solution Approach 1:
The system performs preliminary actions by acquiring height information from multiple reference points and creating a virtual plane before actual flatness measurement. This preliminary virtual plane creation establishes a reference that compensates for dust-induced tilting, eliminating the need for frequent cleaning while maintaining measurement accuracy.
Solution Approach 2:
The system creates a virtual plane as a digital copy or representation of the component's reference surface. This virtual plane serves as a computational reference that replaces the need for physical cleaning, allowing the system to account for and correct dust-induced deviations through data processing rather than physical intervention.
2Measurement precision
If glass substrate is used for three-dimensional measurement, then measurement capability is improved, but device complexity and limitations regarding thickness and manufacturer increase
Solution Approach 1:
The system replaces the mechanical/optical system using glass substrate and laser radiation with an information processing system. Instead of using physical glass substrates to achieve three-dimensional measurement, the system uses captured data from reference points to create virtual planes, substituting complex mechanical measurement apparatus with computational geometry methods.
3Measurement precision
If averaging process is used to remove noises from glass substrate, then measurement accuracy is improved, but inspection time is increased
Solution Approach 1:
The system performs preliminary actions by acquiring height information from multiple reference points and creating a virtual plane before actual flatness measurement. This preliminary virtual plane creation establishes a reference that compensates for dust-induced tilting, eliminating the need for frequent cleaning while maintaining measurement accuracy.
Data Source
AI summary
A flatness detection method is provided for detecting component tilt regardless of measurement conditions. The flatness detection method is based on data of an electronic component captured by a 3D camera and is realized by acquiring position information and height information of a plurality of reference points of the electronic component, creating a virtual plane based on the position and the height information of at least three of the plurality of reference points, determining, based on the height information that takes, as a reference, the virtual plane of the reference points excluding selected points from the reference points, whether the virtual plane is a valid plane or an invalid plane, and detecting flatness of the component by taking the valid plane as a reference.