Electronics Manufacturing Technical Articles

Electronics Manufacturing Technical Articles

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

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1757 SMT / PCB Assembly Related Technical Articles

Programmable Logic Controller vs Programmable Automation Controller

Apr 03, 2013 | Don Fitchett

PLC vs PAC Difference & PAC Automation Controller Defined: This PLC vs PAC Difference article defines the PAC automation controller in relationship to the PLC. A PLC vs PAC comparison. Even more importantly, this article explains in great detail the need to differentiate when it comes to requesting and delivering PAC and/or PLC training....

Publisher: Business Industrial Network

Business Industrial Network

Offers training software, simulators, and videos. Also, on-site training qualifies for CEUs for maintenance, engineering, and management professionals.

Las Vegas, Nevada, USA

Consultant / Service Provider, Distributor, Media / Publisher / Online Resource, Research Institute / Laboratory / School, Training Provider

A Designed Experiment for the Influence of Copper Foils on Impedance, DC Line Resistance and Insertion Loss

Mar 28, 2013 | Alexander Ippich

For the last couple of years, the main concerns regarding the electrical performance of blank PCB boards were impedance and ohmic resistance. Just recently, the need to reduce insertion loss came up in discussions with blank board customers (...) The paper describes the test vehicle and the testing methodology and discusses in detail the electrical performance characteristics. The influence of the independent variables on the performance characteristics is presented. Finally the thermal reliability of the boards built applying different copper foils and oxide replacements was investigated....

Publisher: Multek Inc.

Multek Inc.

Multek is one of the leading printed circuit board suppliers in the world with nine production sites globally.

Northfield, Minnesota, USA

Manufacturer

Vapor Phase Technology and its Application

Mar 27, 2013 | Allen Duck

Vapor phase, once cast to the annals’ of history is making a comeback. Why? Reflow technology is well developed and has served the industry for many years, it is simple and it is consistent. All points are true – when dealing with the centre section of the bell curve. Today’s PCB manufacturers are faced with many designs which no longer fall into that polite category but rather test the process engineering groups with heavier and larger panels, large ground planes located in tricky places, component mass densities which are poorly distributed, ever changing Pb Free alloys and higher process temperatures. All the time the costs for the panels increase, availability of “process trial” boards diminishes and yields are expected to be extremely high with zero scrap rates. The final process in the assembly line has the capacity to secure all the value of the assembly or destroy it. If a panel is poorly soldered due to poor Oven setup or incorrect programming of the profile the recovery of the panel is at best expensive, at worst a loss. For these challenges people are turning to Vapor Phase....

Publisher: A-Tek Systems Group LLC

A-Tek Systems Group LLC

Distributor of the highest quality SMT assembly equipment. Our 45 years of combined experience and commitment to excellence have earned us the reputation as the premier distributor in the Americas.

Longmont, Colorado, USA

Distributor, Manufacturer

Low Cycle Fatigue Behaviour of Multi-joint Sample in Mechanical Testing

Mar 21, 2013 | C.P. Hunt, O. Thomas, D. Di Maio, E. Kamara, H. Lu

This paper explores the behaviour of a copper test vehicle with multiple reflowed solder joints, which has direct relevance to ball grid arrays (BGA) and high density interconnect structures. The paper explores the relative stress conditions on the distributed joints and the sensitivity to ball joint shape... First published in the 2012 IPC APEX EXPO technical conference proceedings...

Publisher: National Physical Laboratory

National Physical Laboratory

NPL is the UK's National Measurement Institute, and a world-leading centre of excellence in developing and applying the most accurate measurement standards, science and technology available.

Middlesex, United Kingdom

Research Institute / Laboratory / School

Assembly and Reliability of 1704 I/O FCBGA and FPBGAs

Mar 14, 2013 | Reza Ghaffarian, Ph.D.

Commercial-off-the-shelf ball/column grid array packaging (COTS BGA/CGA) technologies in high reliability versions are now being considered for use in a number of National Aeronautics and Space Administration (NASA) electronic systems. Understanding the process and quality assurance (QA) indicators for reliability are important for low-risk insertion of these advanced electronic packages. This talk briefly discusses an overview of packaging trends for area array packages from wire bond to flip-chip ball grid array (FCBGA) as well as column grid array (CGA). It then presents test data including manufacturing and assembly board-level reliability for FCBGA packages with 1704 I/Os and 1-mm pitch, fine pitch BGA (FPBGA) with 432 I/Os and 0.4-mm pitch, and PBGA with 676 I/Os and 1.0-mm pitch packages. First published in the 2012 IPC APEX EXPO technical conference proceedings....

Publisher: Jet Propulsion Laboratory

Jet Propulsion Laboratory

The JPL is the lead U.S. center for robotic exploration of the solar system, and conducts major programs in space-based Earth sciences and astronomy.

Pasadena, California, USA

Standards Setting / Certification, Training Provider

Compatibility of Cleaning Agents With Nano-Coated Stencils

Mar 12, 2013 | David Lober and Mike Bixenman, D.B.A.

High density and miniaturized circuit assemblies challenge the solder paste printing process. The use of small components such as 0201, 01005 and μBGA devices require good paste release to prevent solder paste bridging and misalignment. When placing these miniaturized components, taller paste deposits are often required. To improve solder paste deposition, a nano-coating is applied to laser cut stencils to improve transfer efficiency. One concern is the compatibility of the nano-coating with cleaning agents used in understencil wipe and stencil cleaning. The purpose of this research is to test the chemical compatibility of common cleaning agents used in understencil wipe and stencil cleaning processes.Compatibility of Cleaning Agents With Nano-Coated Stencils...

Publisher: KYZEN Corporation

KYZEN Corporation

A leading supplier of precision cleaning chemistries to the worldwide electronics, metal finishing, medical, semiconductor, and optical industries.

Nashville, Tennessee, USA

Manufacturer

PTH Core-to-Core Interconnect Using Sintered Conductive Pastes

Mar 07, 2013 | Michael Matthews, Ken Holcomb, Jim Haley, Catherine Shearer

The market for high-layer-count printed circuit boards (PCB) containing blind and buried vias was once relatively small, and focused on specialized applications in the military and high end computing. The demand for these types of PCBs today is being driven by an increasing number of commercial applications in the telecommunications and semiconductor test market segments. These applications typically require high-aspect-ratio plated-through-holes (PTHs) and blind and buried vias in order to meet the applications interconnect density requirements. Blind and buried vias and high aspect ratio PTHs continue to present manufacturing challenges and frequently are the limiting features to achieving high fabrication yield... First published in the 2012 IPC APEX EXPO technical conference proceedings...

Publisher: Ormet Circuits, Inc.

Ormet Circuits, Inc.

Manufacturer of sintering, electrically conductive materials. Applications include semiconductor die attach, component attach, via fill, z-axis interconnection, conductive lines and traces and plated-through hole fill.

San Diego, California, USA

Manufacturer

Cut Costs and Increase Efficiency with Innovation

Mar 07, 2013 | Pete Doyon, VP of Product Management

No one can deny that organizations across the country have been greatly affected by the decline in the economy. The manufacturing industry is no different. Even now as things seem to be looking up, companies are continually looking to cut costs and increase efficiencies. In addition, these companies must remain compliant with the strict quality and safety standards of the industry, adding even more pressure. Because of this, innovative, automated and easy to use products are needed more than ever before to help companies achieve their goals....

Publisher: Schleuniger, Inc.

Schleuniger, Inc.

Schleuniger, Inc. is a leading manufacturer of wire processing equipment. Our innovative automatic and semi-automatic machines are designed to cut, strip, crimp and mark all types of wire and cable.

Manchester, New Hampshire, USA

Other

Process Issues For Fine Pitch CSP Rework and Scavenging

Mar 04, 2013 | Anthony A. Primavera Ph.D.

Chip-scale (or chip-size) packages are rapidly becoming an important element in electronics due to their size, performance, and cost advantages [Hou, 1998]. The Chip Scale Package (CSP) is becoming a key semiconductor package type, particularly for consumer products. Due to their relatively smaller size, new challenges are presented in the rework and repair of CSPs. (...) The specific focus of this paper is the removal process for rework of CSPs and the site scavenging methods required to properly prepare the circuit board for a new component. Process factors such as the heating, fluxing and, atmosphere are discussed....

Publisher: Universal Instruments Corporation

Universal Instruments Corporation

Universal Instruments is a global leader in the design and manufacture of advanced automation and assembly equipment solutions for the electronics manufacturing industry.

Conklin, New York, USA

Manufacturer

Effect of Cooling Rate on the Intermetallic Layer in Solder Joints

Feb 28, 2013 | Keith Sweatman, Tetsuro Nishimura, Stuart D. McDonald, Kazuhiro Nogita

While it has long been known that the Cu6Sn5 intermetallic that plays a critical role in the reliability of solder joints made with tin-containing alloys on copper substrates exists in two different crystal forms over the temperature range to which electronics circuitry is exposed during assembly and service, it has only recently been recognized that the change from one form to the other has implications for solder joint reliability. (..) In this paper the authors report a study of the effect of cooling rates on Cu6Sn5 crystals. Cooling rates from 200°C ranged from 10°C/minute to 100°C/minute and the effect of isothermal ageing at intermediate temperatures was also studied. The extent of the phase transformation after each regime was determined using synchrotron X-ray diffraction. The findings have important implications for the manufacture of solder joints and their in-service performance... First published in the 2012 IPC APEX EXPO technical conference proceedings.......

Publisher: Nihon Superior Co., Ltd.

Nihon Superior Co., Ltd.

Nihon has been a leader in soldering and brazing since 1966. Nihon manufactures SMT solder joining materials e.g. lead-free solder (SN100C:Sn-Cu-Ni-Ge etc): solder paste, solder spheres, flux cored solder wire, solder bar, etc.

Osaka, Japan

Manufacturer

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