Electronics Manufacturing Technical Articles

Electronics Manufacturing Technical Articles

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1867 SMT / PCB Assembly Related Technical Articles

Basics of ASHCROFT Pressure Transmitter - Performance Index, Wiring, Thread Type, Unavoidable Inaccuracies and Mounting

Nov 29, 2021 | markee

ASHCROFT pressure transmitter is one of the most commonly used transmitters in industrial applications. It is widely used in a variety of control environments, involving water conservancy and hydropower, railway transportation, intelligent building, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools and pipelines. ASHCROFT pressure transmitter is an electronic device that senses the pressure signal and converts it into an available output electrical signal according to certain rules....

Publisher: OKmarts Industrial Parts Mall

OKmarts Industrial Parts Mall

OKmarts is an authorized and one-stop online mall for industrial parts covering refrigeration compressors, servo drives, servo motors, amplifiers, VFDs, HMIs, PLCs, encoders, sensors and more!

Hartford, Connecticut, USA

Equipment Dealer / Broker / Auctions

An Investigation into Alternative Methods of Drying Moisture Sensitive Devices

Nov 26, 2021 | Vinny Nyugen

The use of desiccant bags filled with Silica Sand and or Clay beads used in conjunction with a Moisture Barrier Bag to control moisture for storage of printed circuit boards has long been an accepted practice and standard from both JEDEC and IPC organizations. Additionally, the use heated ovens for baking off moisture using the evaporation process has also been a longstanding practice from these organizations. This paper on alternative drying methods will be accompanied by completed independent, unbiased tests conducted by Vinny Nguyen, an engineering student (now graduated) from San Jose State University. The accompanied paper will examine the performance levels of different technologies of desiccant bags to control moisture in enclosed spaces. The tests and equipment set were reviewed by an engineer and consultant to the Lockheed Martin Aerospace Division and the IPC - TM-650 2.6.28 test method was review by engineer from pSemi. The tests were designed to mimic performance tests outlined in Mil Spec 3464, which both IPC and JEDEC have adopted for their respective standards. The test examined variables including absorption capacity rates, weight gain and release of moisture back into the enclosed area. The presentation will also address and highlight: • Similarities of PCBs and Heavy Equipment as it applies to Inspections, Causes of Failure, Types of Corrosion and Moisture Collection Points. • Performance Attributes of Different Desiccant Technologies as it applies to shape, texture, change outs, labeling and regeneration. • Venn Diagram of Electromechanical Failure with the circles 1. Current 2. Contamination 3. Humidity Presentation Available...

Publisher: Steel Camel

Steel Camel

Super powerful expanding desiccant to keep boards & microelectronics moisture free.... Much different than Silica Sand Beads. Also supplier of corrosion prevention treatments that are alternatives to Conformal coatings.

Tampa, Florida, USA

Other

Basics of Industrial Control System and the Use of PLC

Nov 26, 2021 | markee

The components of industrial control system (ICS) can be roughly divided into two categories according to their location: control center equipment and remote site equipment....

Publisher: OKmarts Industrial Parts Mall

OKmarts Industrial Parts Mall

OKmarts is an authorized and one-stop online mall for industrial parts covering refrigeration compressors, servo drives, servo motors, amplifiers, VFDs, HMIs, PLCs, encoders, sensors and more!

Hartford, Connecticut, USA

Equipment Dealer / Broker / Auctions

Different Types of Pressure Transmitters, Working Principle, and How to Select Pressure Transmitter

Nov 25, 2021 | markee

Pressure transmitter is a kind of pressure measuring instrument widely used in many transmitters. It is widely used in petroleum, chemical, metallurgy, food, electric power, medicine, papermaking, textile and other industries. It is mainly used to detect the differential pressure, pressure, absolute pressure and liquid level of fluid....

Publisher: OKmarts Industrial Parts Mall

OKmarts Industrial Parts Mall

OKmarts is an authorized and one-stop online mall for industrial parts covering refrigeration compressors, servo drives, servo motors, amplifiers, VFDs, HMIs, PLCs, encoders, sensors and more!

Hartford, Connecticut, USA

Equipment Dealer / Broker / Auctions

Automated Optical Inspection Method for Light-Emitting Diode Defect Detection Using Unsupervised Generative Adversarial Neural Network

Nov 22, 2021 | Che-Hsuan Huang, Pei-Hsuan Lee, Shu-Hsiu Chang, Hao-Chung Kuo, Chia-Wei Sun, Chien-Chung Lin, Chun-Lin Tsai and Xinke Liu

Many automated optical inspection (AOI) companies use supervised object detection networks to inspect items, a technique which expends tremendous time and energy to mark defectives. Therefore, we propose an AOI system which uses an unsupervised learning network as the base algorithm to simultaneously generate anomaly alerts and reduce labeling costs. This AOI system works by deploying the GANomaly neural network and the supervised network to the manufacturing system. To improve the ability to distinguish anomaly items from normal items in industry and enhance the overall performance of the manufacturing process, the system uses the structural similarity index (SSIM) as part of the loss function as well as the scoring parameters. Thus, the proposed system will achieve the requirements of smart factories in the future (Industry 4.0)....

Publisher: Shenzhen University

Shenzhen University

Shenzhen University is a public research university located in Nanshan district, Shenzhen, Guangdong, China. It is accredited by the State Council of the People's Republic of China and is funded by the Shenzhen City Government.

Shenzhen, Guangdong Province, China

Research Institute / Laboratory / School

Streaming Machine Learning and Online Active Learning for Automated Visual Inspection

Nov 22, 2021 | Jože M. Rožanec, Elena Trajkova, Paulien Dam, Blaž Fortuna, Dunja Mladenić

Quality control is a key activity performed by manufacturing companies to verify product conformance to the requirements and specifications. Standardized quality control ensures that all the products are evaluated under the same criteria. The decreased cost of sensors and connectivity enabled an increasing digitalization of manufacturing and provided greater data availability. Such data availability has spurred the development of artificial intelligence models, which allow higher degrees of automation and reduced bias when inspecting the products. Furthermore, the increased speed of inspection reduces overall costs and time required for defect inspection. In this research, we compare five streaming machine learning algorithms applied to visual defect inspection with real world data provided by Philips Consumer Lifestyle BV. Furthermore, we compare them in a streaming active learning context, which reduces the data labeling effort in a real-world context. Our results show that active learning reduces the data labeling effort by almost 15% on average for the worst case, while keeping an acceptable classification performance. The use of machine learning models for automated visual inspection are expected to speed up the quality inspection up to 40%....

Publisher: Jožef Stefan Institute

Jožef Stefan Institute

The Jožef Stefan Institute is the largest research institute in Slovenia. The main research areas are physics, chemistry, molecular biology, biotechnology, information technologies, reactor physics, energy and environment. ...

Ljubljana, Slovenia

Research Institute / Laboratory / School

An Automatic Optical Inspection System for the Diagnosis of Printed Circuits Based on Neural Networks

Nov 22, 2021 | Ahmed Nabil Belbachir, Mario Lera, Alessandra Fanni, Augusto Montisci

The aim of this work is to define a procedure to develop diagnostic systems for Printed Circuit Boards, based on Automated Optical Inspection with low cost and easy adaptability to different features. A complete system to detect mounting defects in the circuits is presented in this paper. A low cost image acquisition system with high accuracy has been designed to fit this application. Afterward, the resulting images are processed using the Wavelet Transform and Neural Networks, for low computational cost and acceptable precision. The wavelet space represents a compact support for efficient feature extraction with the localization property. The proposed solution is demonstrated on several defects in different kind of circuits....

Publisher: Vienna University of Technology [TU Wien]

Vienna University of Technology [TU Wien]

TU Wien is one of the major universities in Vienna, Austria. The university finds high international and domestic recognition in teaching as well as in research and is a highly esteemed partner of innovation-oriented enterprise.

Vienna, Austria

Research Institute / Laboratory / School

Effect of Nano-Coated Stencil on 01005 Printing

Nov 17, 2021 | Rita Mohanty Ph.D., S. Manian Ramkumar Ph.D., Chris Anglin, Toshitake Oda

The demand for product miniaturization, especially in the handheld device area, continues to challenge the board assembly industry. The desire to incorporate more functionality while making the product smaller continues to push board design to its limit. It is not uncommon to find boards with castle-like components right next to miniature components. This type of board poses a special challenge to the board assemblers as it requires a wide range of paste volume to satisfy both small and large components. One way to address the printing challenge is to use creative stencil design to meet the solder paste requirement for both large and small components. ... The most important attribute of a stencil is its release characteristic. In other words, how well the paste releases from the aperture. The paste release, in turn, depends on the surface characteristics of the aperture wall and stencil foil. The recent introduction of new technology, nano-coating for both stencil and squeegee blades, has drawn the attention of many researchers. As the name implies, nano-coated stencils and blades are made by a conventional method such as laser-cut or electroformed then coated with nano-functional material to alter the surface characteristics. This study will evaluate nano-coated stencils for passive component printing, including 01005....

Publisher: Speedline Technologies, Inc.

Speedline Technologies, Inc.

Speedline Technologies serves the electronics assembly and semiconductor packaging industries with class-leading equipment, responsive support and unparalleled process knowledge.

Franklin, Massachusetts, USA

Manufacturer

SMT Stencil Cleaning: A Decision That Could Impact Production

Nov 16, 2021 | Richard S. Clouthier

Ultrasonics, coupled with an aqueous detergent process that cleans at below 43ºC, may be best suited for fine-pitch SMT screens and stencils. Aqueous detergents clean more effectively than solvents, with little or no environmental impact. Because of the environmental concerns driving today's technology decisions, the once simple decision of selecting a stencil cleaning process is now clouded with different chemicals, different cleaning machines and various types of solder paste, all with specific environmental, health and safety related issues and regulations....

Publisher: Xerox

Xerox

manufacture of photocopiers

Dundalk, Ireland

Operation about MIC audio test

Nov 15, 2021 | pti

The audio comprehensive tester can test consumer audio, automotive electronics and other audio products, such as mobile phones, headphones, speakers, players, power amplifiers, home cinemas, televisions, set-top boxes, automotive multimedia hosts, etc. It is suitable for rapid testing of production line and R & D testing. It can realize fast audio, simple and convenient operation, and support automatic testing. Support analog / digital input and analog output, up to 192K digital sampling rate, and multiple test functions, including audio output, signal acquisition, audio file analysis, etc....

Publisher: Shenzhen PTI Technology CO.,LTD

Shenzhen PTI Technology CO.,LTD

Our company was established in 2004, Main products: ICT on-line tester, ICT, functional testing machine 、FCT、 TSI、 automatic test and control system (ATE), test automation solutions, etc.

深圳, China

Manufacturer

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