Electronics Manufacturing Technical Articles

Electronics Manufacturing Technical Articles

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

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1789 SMT / PCB Assembly Related Technical Articles

Mathematical Model For Dynamic Force Analysis Of Printed Circuit Boards

Sep 15, 2021 | I.I. Kovtun, J.M. Boiko, S.A. Petrashchuk

Mathematical model for dynamic force analysis of printed circuit boards has been designed to calculate dynamic deformations and stresses in printed circuit boards and assess their dynamic strength and rigidity. The represented model describes a printed circuit board as a separate oscillatory system, which is simulated as prismatic beam set on two oscillating supports. Simulation and assessment of stress and deflection in printed circuit boards and obtaining their amplitude frequency responses provided recommendations, which ensure strength and stiffness of printed circuit boards subjected to dynamic loads.....

Publisher: Khmelnytsky National University

Khmelnytsky National University

Established in 1962, Khmelnytskyi National University is a non-profit public higher-education institution located in the urban setting of the medium city of Khmelnitsky (population range of 250,000-499,999 inhabitants), Khmelnytsk

Khmelnytskyi Oblast, Ukraine

Research Institute / Laboratory / School

Failure Mechanisms Of Electromechanical Relays On PCBAs: Part I

Sep 15, 2021 | Gert Vogel

Many printed circuit board assemblies (PCBAs) have relays that are soldered to the PCB. If such an electromechanical component fails, it can cause the whole device to fail, just like any other electronic component. The spectrum of root causes that lead to an increased contact resistance or a complete contact failure is totally different from what usually occurs in the electronics domain. This article provides a detailed analysis of these failures and the corresponding root causes, many of them self-centering....

Publisher: Siemens Process Industries and Drives

Siemens Process Industries and Drives

Siemens industrial manufacturing software, process automation, and automation and drives technology increases flexibility, cuts market launch lead time, and significantly reduces energy for manufacturing companies.

Alpharetta, Georgia, USA

Consultant / Service Provider, Manufacturer, Training Provider

Failure Analysis

Sep 15, 2021 | ASM International®

Analyzing failures is a critical process in determining the physical root causes of problems. The process is complex, draws upon many different technical disciplines, and uses a variety of observation, inspection, and laboratory techniques. One of the key factors in properly performing a failure analysis is keeping an open mind while examining and analyzing the evidence to foster a clear, unbiased perspective of the failure....

Publisher: ASM International

ASM International

ASM International, formerly known as the American Society for Metals, an association of materials-centric engineers and scientists. ASM is dedicated to informing, educating, & connecting the materials community to solve problems.

Materials Park, Ohio, USA

Association / Non-Profit

Auto Electronic ICT+ Programming Automation Solution

Sep 09, 2021 | pti

Auto Electronic ICT+ Programming Automation Solution...

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

The Great SAC Debate: Comparing The Reliability Of SAC305 And SAC405 Solders In A Variety Of Applications

Sep 08, 2021 | Heather McCormick, Polina Snugovsky, Craig Hamilton, Zohreh Bagheri, and Simin Bagheri

Although the electronics industry has largely settled on the use of SAC alloys for the assembly of the majority of lead free products, debate continues to exist over which SAC alloy – SAC305 (Sn3.0Ag0.5Cu) or SAC405 (Sn3.8Ag0.8Cu) – to use. The North American industry generally favours SAC405, while the Asian industry favours SAC305. SAC305 has the significant benefit of being less expensive than SAC405 owing to its lower silver content. However, there are lingering questions about whether the reliability of SAC305 is comparable to that of SAC405. Recent studies have concluded that no significant difference exists, but many potential applications were not studied. This paper compares the results of reliability testing of SAC305 and SAC405 in three different cases on a test vehicle representative of a mid-complexity server-type product which included a range of component types from CBGAs to discrete resistors....

Publisher: Celestica Corporation

Celestica Corporation

A multinational electronics manufacturing services (EMS) company.

Toronto, Ontario, Canada

Manufacturer, Standards Setting / Certification, Training Provider

iNEMI Pb-Free Alloy Characterization Project Report: Part II - Thermal Fatigue Results For Two Common Temperature Cycles

Sep 08, 2021 | Richard Parker, Richard Coyle, Gregory Henshall, Joe Smetana, Elizabeth Benedetto

The Pb-Free Alloy Characterization Program sponsored by International Electronics Manufacturing Initiative (iNEMI) is conducting an extensive investigation using accelerated temperature cycling (ATC) to evaluate ball grid array (BGA) thermal fatigue performance of 12 commercial or developmental Sn based Pb-free solder alloys. This paper presents the initial findings from a specific subset of the temperature cycling test matrix. The focus is on comparing alloy performance for two of the most commonly specified temperature cycles, 0 to 100 °C and -40 to 125 °C....

Publisher: iNEMI (International Electronics Manufacturing Initiative)

iNEMI (International Electronics Manufacturing Initiative)

iNEMI is an industry-led consortium focused on identifying and closing technology gaps, which includes the development and integration of the electronics industry supply infrastructure.

Herndon, Virginia, USA

Effect Of Silver In Common Lead-Free Alloys

Sep 08, 2021 | Ranjit Pandher, Tom Lawlor

There is need in the industry to understand the effects of silver presence in solders from various applications perspective. This article will attempt to present a review of the key published results on the silver containing alloys along with results of our internal studies on wave soldering, surface mount and BGA/CSP applications. Advantages and disadvantages of silver at different levels will be discussed. Specifically this report will focus on the effect of silver on process conditions, drop shock resistance, solder joint survivability in high strain rate situations, thermal fatigue resistance, Cu dissolution and effects of silver in combination with other alloy additives. Specific application problems demanding high silver level and other requiring silver level to the minimum will be discussed....

Publisher: Cookson Electronics

Cookson Electronics

Leading materials science company that provides high performance materials, chemistry and technology solutions to the electronics and surface finishing industries worldwide.

Lakeville, Minnesota, USA

Manufacturer

Modeling Temperature Cycle Fatigue Life of Select SAC Solders

Sep 08, 2021 | Michael Osterman

While the presence of silver in SAC solder provided excellent temperature cycling durability, the silver in high silver SAC alloy also made the solders susceptible to failures under drop/shock loading. To improve the drop/shock reliability, the silver content in SAC alloys was reduced from three percent, to as low as no silver. Solder dopants, also known as microalloy additions, are elements (typically 0.1% or lower) other than the main constituents of the alloy that have been shown to improve solder performance. Commonly used microalloy additions include nickel (Ni), bismuth (Bi), manganese (Mn), and antimony (Sb)....

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, USA

Consultant / Service Provider, Training Provider

Investigation of the Mechanical Properties of Mn-Alloyed Tin-Silver-Copper Solder Solidified with Different Cooling Rates

Sep 08, 2021 | Tamás Hurtony, Oliver Krammer, Balázs Illés, Gábor Harsányi, David Bušek and Karel Dušek

Manganese can be an optimal alloying addition in lead-free SAC (SnAgCu) solder alloys because of its low price and harmless nature. In this research, the mechanical properties of the novel SAC0307 (Sn/Ag0.3/Cu0.7) alloyed with 0.7 wt.% Mn (designated as SAC0307-Mn07) and those of the traditionally used SAC305 (Sn96.5/Ag3/Cu0.5) solder alloys were investigated by analyzing the shear force and Vickers hardness of reflowed solder balls. During the preparation of the reflowed solder balls, different cooling rates were used in the range from 2.7 K/s to 14.7 K/s....

Publisher: Budapest University of Technology and Economics

Budapest University of Technology and Economics

BME is considered the world's oldest Institute of Technology which has university rank and structure. It was the first institute in Europe to train engineers at university level.

Budapest, Hungary

Research Institute / Laboratory / School

Utsource is a global online store of electronic components.

Sep 07, 2021 | Utsource

Utsource grows from a child to an adult serving the global 30W + customers. UTSOURCE.net is a professional purchasing B2B & B2C tools in electronic components field. UTSOURCE.net provides different types such as IC, Modules, RF transistors etc., and various product type's PDF parameter form as well as the related photographs, we also provide satisfying one-stop package service for customers. We fell honored to serve the global 30W + customers.We spent 15 years touching the needs of customers from all over the world.So we know better that our customers need their packages to arrive safely.After-sales service need at your fingertips and intimate service should be to customers' satisfaction...

Publisher: utsource

utsource

UTSOURCE.net is a professional purchasing B2B & B2C tools in electronic components field. UTSOURCE.net provides different types such as IC, Modules, RF transistors etc.,

Alhambra, California, USA

Manufacturer

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