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SMTnet Express August 8, 2013, Subscribers: 26202, Members: Companies: 13446, Users: 35028

Automatic PCB Defect Detection Using Image Substraction Method

by Sonal Kaushik, Javed Ashraf; Al-Falah School of Engineering & Technology

A printed circuit board, or (PCB) is used to mechanically support and electrically connect electronic components using conductive pathways, track or signal traces etched from copper sheets laminated onto anon conductive substrate. The automatic inspection of PCBs serves a purpose which is traditional in computer technology. The purpose is to relieve human inspectors of the tedious and inefficient task of looking for those defects in PCBs which could lead to electric failure.

In this project Machine Vision PCB Inspection System is applied at the first step of manufacturing, i.e., the making of bare PCB. We first compare a PCB standard image with a PCB image, using a simple subtraction algorithm that can highlight the main problem-regions. We have also seen the effect of noise in a PCB image that at what level this method is suitable to detect the faulty image. Our focus is to detect defects on printed circuit boards & to see the effect of noise. Typical defects that can be detected are over etchings (opens), under-etchings (shorts), holes etc...

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Forum search results for related keywords: machine vision, defects, PCB Inspection

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IPC APEX India
August 27-29

Surface Cleanliness Assessment - Free Online Webinar
August 15

Jobs:

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Austin, TX, USA | Adecco Engineering & Technical

SMT Process Engineer

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Industry Associations Events

SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore

Next Event: Free Webinar: Cleaning a No-Clean Flux and Related Reliability Issues - August 13

IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly. Membership Info | Training & Certification Programs | Standards & Publications - Online Store

Next Event: IPC APEX India - August 27 - 29

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

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