Electronics Manufacturing Technical Articles

Electronics Manufacturing Technical Articles

Papers and articles related to SMT, PCB & EMS industry.


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668 SMT / PCB Technical Articles

Reliability of Embedded Planar Capacitors under Temperature and Voltage Stress

May 21, 2015 | Mohammed A. Alam, Michael H. Azarian, Michael Osterman and Michael Pecht

In this work the reliability of an embedded planar capacitor laminate under temperature and voltage stress is investigated. The capacitor laminate consisted of an epoxy-BaTiO3 composite sandwiched between two layers of copper. The test vehicle with the embedded capacitors was subjected to a temperature of 125oC and a voltage bias of 200 V for 1000 hours. Capacitance, dissipation factor, and insulation resistance were monitored in-situ. Failed capacitors exhibited a sharp drop in insulation resistance, indicating avalanche breakdown. The decrease in the capacitance after 1000 hours was no more than 8% for any of the devices monitored. The decrease in the capacitance was attributed to delamination in the embedded capacitor laminate and an increase in the spacing between the copper layers....

Publisher: CALCE Center for Advanced Life Cycle Engineering

CALCE Center for Advanced Life Cycle Engineering

The largest electronic products research center focused on electronics reliability, is dedicated to providing a knowledge and resource base to support the development of competitive electronic components, products and systems.

College Park, Maryland, United States

Service Provider, Training / Education

Reliability of Stacked Microvia

May 14, 2015 | Hardeep Heer, Ryan Wong

The Printed Circuit Board industry has seen a steady reduction in pitch from 1.0mm to 0.4mm; a segment of the industry is even using or considering a 0.25mm pitch. This has increased the use of stacked microvias in these designs. The process of stacking microvias has been practiced for several years in handheld devices; however, the devices generally do not operate in harsh conditions. Type 1 and Type 2 microvias have been tested over the years and have been found to be very reliable. We do not have enough test data for 3 and 4 stack microvias when placed on and off buried via. The main objective of this study was to understand the reliability of 3 and 4 stack microvias placed on and off a buried via....

Publisher: Firan Technology Group

Firan Technology Group

FTG is a leading North American manufacturer of high technology printed circuit boards and precision illuminated display systems.

Toronto, Ontario, Canada

Manufacturer of Assembled PCBs, Contract Manufacturer, Service Provider

The Long-term Shaping of the JTAG/Boundary-scan Standards

May 11, 2015 | Peter van den Eijnden, MD JTAG Technologies.

Originating from the last millenium, almost three decades ago, the introduction of surface mount packaging triggered a wave of changes throughout many aspects of electronics production. A small number of talented, innovative test engineers from various big players of the industry started to attend meetings to discuss the impact of that change of technology on their future test concepts for modern assemblies. The Joint Test Action Group was born....

Publisher: JTAG Technologies B. V.

JTAG Technologies B. V.

Market leader and technology innovator of boundary scan software and hardware products and services.

Eindhoven , Netherlands

Test Services, Software Manufacturer

Signal Transmission Loss due to Copper Surface Roughness in High-Frequency Region

Apr 30, 2015 | Elaine Liew, Mitsui Copper Foil Malaysia, Shah Alam Malaysia Taka-aki Okubo, Toshio Sudo, Shibaura Institute of Technology, Tokyo Japan Toshihiro Hosoi, Hiroaki Tsuyoshi, Fujio Kuwako, Mitsui Kinzoku Co., Ltd, Japan.

Higher-speed signal transmission is increasingly required on a printed circuit board to handle massive data in electronic systems. So, signal transmission loss of copper wiring on a printed circuit board has been studied. First, total signal loss was divided into dielectric loss and conductor loss quantitatively based on electromagnetic theory. In particular, the scattering loss due to surface roughness of copper foil has been examined in detail. And the usefulness of the copper foil with low surface roughness has been demonstrated....

Publisher: Mitsui Kinzoku Group

Mitsui Kinzoku Group

Manufacturing of functional engineered materials and electronic materials, nonferrous metal smelting, minerals resource development, precious metal recycling, raw material related businesses.

Tokyo, Japan

Other

True Height Measurement in Solder Paste Inspection

Apr 29, 2015 | Dr. Subodh Kulkarni

SPI equipment is routinely used in Printed Circuit Board (PCB) manufacturing to monitor and control one of the most crucial steps affecting the finished quality of circuit board. Solder paste deposition is the key process in board assembly operations using SMT techniques. Our LSM™ system was the industry's first popular method of manually inspecting solder paste; our SE systems revolutionized SMT production by offering an automated method for performing in-process 3D inspection on the assembly line. SPI systems measure the height and volume of the solder pads before the components are applied and the solder melted, and when used properly, can reduce the incidence of solder-related defects to statistically insignificant amounts. Critical to the SPI measurement is the accuracy of the height measurement because that has a direct correlation with solder volume and defects....

Publisher: CyberOptics Corporation

CyberOptics Corporation

CYBEROPTICS is a global leader in high-precision 3D sensors that significantly improve yields and productivity in the 3D scanning and metrology, Surface Mount Technology (SMT) & Semiconductor Markets

Minneapolis, Minnesota, United States

Inspection

Advanced modelling technique achieves near to zero set up time and minimal tuning

Apr 29, 2015 | Sean Langbridge

Statistical Appearance Modelling technology enables an AOI system to “learn real world variation” based on operator interaction with inspection task results. This provides an accurate statistical description of normal variation in a product. With modelling technology, the user does not have to anticipate potential defects as the system will “flag” anything outside the “normal production range”. And, since the system is programmed with real production variation, it is sensitive to small subtle changes enabling reliable defect detection. Autonomous prediction of process variation enables an AOI system to be set up from a single PCB with production-ready performance. Setup time can be < 15 minutes from data input to first PCB inspection making it an ideal solution for NPI and first-off verification....

Publisher: CyberOptics Corporation

CyberOptics Corporation

CYBEROPTICS is a global leader in high-precision 3D sensors that significantly improve yields and productivity in the 3D scanning and metrology, Surface Mount Technology (SMT) & Semiconductor Markets

Minneapolis, Minnesota, United States

Inspection

Rework Challenges for Smart Phones and Tablets

Apr 23, 2015 | Paul Wood Advanced Product Applications Manager APR/ BGA Products OK International / Metcal.

Smart phones are complex, costly devices and therefore need to be reworked correctly the first time. In order to meet the ever-growing demand for performance, the complexity of mobile devices has increased immensely, with more than a 70% greater number of packages now found inside of them than just a few years ago. For instance, 1080P HD camera and video capabilities are now available on most high end smart phones or tablet computers, making their production more elaborate and expensive.

The printed circuit boards for these devices are no longer considered disposable goods, and their bill of materials start from $150.00, with higher end smart phones going up to $238.00, and tablets well over $300.00....

Publisher: Metcal

Metcal

Manufacturer of high-performance precision rework systems for the electronics bench. Product lines include: Hand Soldering and Desoldering, Convection Rework products, Fume Extraction and Fluid Dispensing tools.

Garden Grove, California, United States

Manufacturer of Assembly Equipment, Adhesives/Dispensing, Repair/Rework, Soldering

Stereo Vision Based Automated Solder Ball Height Detection

Apr 16, 2015 | Jinjin Li, Lina J. Karam; School of Electrical, Computer, & Energy Engineering, Arizona State University, Bonnie L. Bennett, Jeff S. Pettinato;Intel Corporation.

Solder ball height inspection is essential to the detection of potential connectivity issues in semi-conductor units. Current ball height inspection tools such as laser profiling, fringe projection and confocal microscopy are expensive, require complicated setup and are slow, which makes them difficult to use in a real-time manufacturing setting. Therefore, a reliable, in-line ball height measurement method is needed for inspecting units undergoing assembly. (...)

In this paper, an automatic, stereo vision based, in-line ball height inspection method is presented. The proposed method includes an imaging setup together with a computer vision algorithm for reliable, in-line ball height measurement....

Publisher: Intel Corporation

Intel Corporation

Intel designs and builds the essential technologies that serve as the foundation for the world's computing devices.

Santa Clara, California, United States

Manufacturer of Components

Good Schematics Lead to GOOD LAYOUTS

Apr 08, 2015 | Advanced Assembly

An electronic schematic describes the electrical connectivity of a piece of equipment or an entire system. It is made up of symbols that represent individual components and contains electrical and mechanical information and their related connectivity, along with other important data. Information contained within the schematic is packaged into a printed circuit board (PCB) where the mechanical footprint is placed onto the board and connectivity information is graphically displayed. The more accurate the information contained in the schematic is and the clearer it is presented, the more it contributes to a robust printed circuit board....

Publisher: Advanced Assembly, LLC.

Advanced Assembly, LLC.

Advanced Assembly provides quality PCB assembly services for prototypes and low-quantity orders 87% faster than other shops.

Aurora, Colorado, United States

Manufacturer of Assembled PCBs, Assembly, Contract Manufacturer, Service Provider

Fix The Process Not Just The Product

Apr 03, 2015 | Mary Elmallakh, M. Sc. and Paul Groome Digitaltest Inc. Andy Shelton Pulse Communications, Inc.

Understanding your process and how to minimize defects has always been important. Nowadays, its importance is increasing with the complexity of products and the customers demand for higher quality. Quality Management Solutions (QMS) that integrate real-time test and inspection results with engineering and production data, can allow the optimization of the entire manufacturing process. We will describe the cost and time benefits of a QMS system when integrated with engineering data and manufacturing processes. We will use real examples that can be derived from integrating this data. This paper also discusses the aspects of Quality Management Software that enables electronic manufacturers to efficiently deliver products while achieving higher quality, reduce manufacturing costs and cutting repair time. Key words: Quality Management Software, ICT, Repair workstations, First Pass Yield, Pareto analysis, Flying Probe, QMS. ...

Publisher: Digitaltest Inc.

Digitaltest Inc.

Digitaltest is a Leading Test Equipment Supplier of; High Accuracy Flying Probe Systems. High Speed, Non-Multiplexed, In-Circiuit Test Solutions. Functional Test Solutions. CAD/CAE, SPC and CAD Translation Software.

Concord, California, United States

Manufacturer of Assembly Equipment, Test Services, OEM, Software Manufacturer

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