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Currently solder joints are inspected visually with a microscope or tested electrically. Neither is completely satisfactory. ... X-ray images give a good indication of solder joint quality because the solder contains lead which is opaque to X-rays. ... DISCUSSION We have described a method of automatically inspecting the solder joints of SMT components using X-ray images. ...doi:10.5244/c.4.29 dblp:conf/bmvc/GriffithsJ90 fatcat:2z62nv2wazhrbaqckbx2t2omxq
Journal of the Japan Society for Precision Engineering
Therefore, HGA inspection needs to be improved during HDD manufacturing. This paper describes an image processing method that automate the optical inspection of HGA solder jet ball joint defects. ... The goal is therefore to develop an automatic inspection system to reduce the chance of errors, reduce costs and improve the productivity. ...  , proposed a Bayesian approach for solder joint defects addressing solder bridging, burnt solder balls, non-wet, dry joints and cases with no connections between the slider and suspension. ...doi:10.37936/ecti-cit.201592.54420 fatcat:tb3iszv57vbwtg2alyojikllri
Journal of the Japan Society for Precision Engineering
Jain : Automatic Visual Inspection of Solder Joints, IEEE Int. Conf. on Robotics & Automation, (1985) 467. 4) 村 岡建 樹:SMTに ... な お,(a),(b),(c),(d)に 示 す ウ ィ ン ドウ は,は ん だ 付 部 抽 出 結 果 を も とに 設 定 す る判 定 処 理 領 域 を 表 して (a) Flllet (b) Solder volume (c) Bridge (d) Mis-alignment い る.ま た,は ん だ 付 欠 陥 は基 本 的 に は フ ィ レ ッ ト形 状 不 良,ブ リ ッ ジ, ...doi:10.2493/jjspe.59.65 fatcat:mfuajvju25hyzis2crp2fjns74
The Laser Inspection system reduced unwarranted "touch-up" since many solder joints rejected on “cosmetic" grounds are acceptable solder joints. ... Also having identified that the Laser Inspection system can be used to inspect solder joints, the costly way is to identify its usage in each drawing. ...
Photonics and Education in Measurement Science 2019
Automatic Optical Inspection (AOI) is an important part of modern electronics manufacturing. ... A new approach is presented, which uses specular reflections of angled illuminations to reconstruct the surface of THT solder joints for inline inspection. ... Figure 1 illustrates an optimal concave through-hole solder joint. When inspecting THT solder joints using automatic optical inspection systems, two criterions are essential. ...doi:10.1117/12.2530888 fatcat:zxeklfjkp5btpjoxz3p63lr54a
This paper proposes two inspection modules for an automatic solder joint classification system. The "front-end" inspection system includes illumination normalisation, localisation and segmentation. ... The "back-end" inspection involves the classification of solder joints using the Log Gabor filter and classifier fusion. ... As a consequence, the variety of the solder joint shapes is also a barrier to the development of an automatic solder joint inspection system. ...doi:10.1016/j.rcim.2011.03.007 fatcat:5ujhquhnxbdppa442xtcqixvqy
For automated X-ray inspection, joint of interest on the X-ray image is located by region of interest (ROI) and inspected by some algorithms. Some incorrect ROIs deteriorate the inspection algorithm. ... Many technologies have been incorporated for inspecting failed soldering, such as X-ray imaging, optical imaging, and thermal imaging. ... Ideally, ROIs not only provide the location of the inspected solder joint, but also the area of the inspected solder joint. However, some ROIs are not reliable. ...arXiv:2008.02604v2 fatcat:etfgz75zcrg3znqq32ec25mwie
This paper proposes the validity of a Gabor filter bank for feature extraction of solder joint images on Printed Circuit Boards (PCBs). ... A distance measure based on the Mahalanobis Cosine metric is also presented for classification of five different types of solder joints. ... Automatic Optical Inspection (AOI) of solder joints has become an important issue for quality control in PCB assembly as AOI has the enormous potential of completely automating human visual inspection ...doi:10.4028/www.scientific.net/amr.97-101.2940 fatcat:xu4dvfhxurbizcedjecl2kltfu
In this study, a predefined template-based image processing system is proposed to automatically detect of PCB soldering defects that negatively affect circuit operation. ... In the next step, a joint template is created that contains solder joints information. This joint template contains information about the joints that includes possible touching odds to other joints. ... The control process is automatically performed according to the color boxes in the template. In Figure 5 , a joint is not inspected by the remaining 49 joints on the template. ...doi:10.18201/ijisae.2017534388 fatcat:lhdb2avoozetxpinrzq37ynexq
Materials Science - Advanced Topics
Previously, the quality of solder joints had only been verified by manual visual inspection (MVI). ... In preparing the parameters for such Materials Science -Advanced Topics 388 Automatic Optical Inspection of Soldering http://dx. ... classify the inspected PWB, component or solder joint. ...doi:10.5772/51699 fatcat:sc4co5f25zagbj2gnjffpfvzyq
This paper describes a procedure in which an infrared detector is used for controlling the quality of solder joints being formed on printed circuit boards while, at the same time, automatically inspecting ... This approach eliminates the "after the fact" inspection operation while also making available real-time data for process control of the soldering operation. ... One needs merely to instruct the computer as to the range of thermal signature values for acceptable joints in order to have an automatic soldering-andinspection system. ...doi:10.1109/37.7740 fatcat:whuydene3vabbcaun63lez36ga
Visual inspection under ultra- violet light is often used in inspecting the soldered seams on Wax or oil filled capacitors. ... Hand soldering requires S892 MacIntosh Soldering Practices Courtesy National Can Co Fig. 11 Can tester. Faulty cans ejected automatically. ...
Modern inspection systems provide comprehensive checks of the body of the element and the solder joint by combining a 2D texture with a 3D inspection. ... The software packages available on the market today provide a data source for solder paste inspection (SPI) and automatic optical inspection (AOI) data. ...doi:10.35784/iapgos.2379 fatcat:jwf2hvsvx5awlnz7altdmlztgq
In this work, for solar panel vision inspection, we present an extreme learning machine (ELM) and moving least square regression based approach to identify solder joint defect and detect the panel position ... Particularly in the field of automatic industry inspection, the machine learning based vision inspection plays a more and more important role in defect identification and feature extraction. ... Therefore, automatic nondestructive inspection can be achieved in machine vision detection system. ...doi:10.1155/2017/7406568 fatcat:tt3yfmxygvb5pjsxydzm62kafy
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