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SMTnet Express, February 1, 2024, Subscribers: 25,330, Companies: 12,010, Users: 28,684

█ Electronics Manufacturing Technical Articles

Mitigation of Pure Tin Risk by Tin-Lead SMT Reflow- Results of an Industry Round-Robin

The risk associated with whisker growth from pure tin solderable terminations is fully mitigated when all of the pure tin is dissolved into tin-lead solder during SMT reflow. In order to take full advantage of this phenomenon, it is necessary to understand the conditions under which such coverage can be assured. A round robin study has been performed by IPC Task group 8-81f, during which identical sets of test vehicles were assembled at multiple locations, in accordance with IPC J-STD-001, Class 3. All of the test vehicles were analyzed to determine the extent of complete tin dissolution on a variety of component types. Results of this study are presented together with relevant conclusions and recommendations to guide high reliability end-users on the applicability and limitations of this mitigation strategy.

Credits: Raytheon

Next Best Thing to a Close Shave: Mitigating the Risks of Tin Whiskers

If you've been in electronics for any length of time, the phenomenon of tin whiskers is something you've likely heard discussed (maybe in scared whispered tones). Tin whiskers certainly aren't a new problem. In fact, some of the first published reports of the occurrence date back to the 1940's and 1950's. But, over half a century later, we're still talking about it.

Credits: Henkel Electronic Materials

Tin Whiskers: Risks with Lead Free | Part I

Tin (Sn) metal displays the characteristic of growing "tin whiskers" from pure tin coatings (most actively on relatively thin, electrodeposited or immersion tin coatings), usually months or years from the initial deposition of the tin. Tin whiskers are electrically conductive, filamentary, single crystals of white (beta phase) tin. These filaments of single crystal tin are usually one to five microns in diameter, and a few microns up to several tens of millimeters long, that grow spontaneously from the tin coatings. Alloying additions of several percent (by weight) of lead (Pb) prevents these electrically conductive tin whiskers from growing. Pb alloyed into the Sn was discovered to prevent the occurrence of tin whiskers in electronic assemblies in the 1950s as the Bell Laboratories solution to the problem of tin whiskers. The alloying of the tin with lead has thus quietly averted incalculable losses from short circuits in electronic equipment for the last 60 years.

Credit: ACI Technologies, Inc.

Tin Whiskers: Mitigation with Conformal Coatings | Part II

One of the two basic risks of employing the commercially accepted, Restriction of Hazardous Substances (RoHS) compliant, lead-free (Pb-free) electronics is the threat to the electronics reliability from the growth of tin whiskers. The other basic risk deals with Pb-free solder joint reliability.

Credit: ACI Technologies, Inc.

Strategies To Mitigate The Tin Whisker Phenomenon

The tin whisker phenomenon is a failure mode associated with all electronic devices that use a number of low melting point elements (e.g., Sn, Cd, In) in operations such as soldering. Recognized many years ago, the problem was minimized by adding lead, now identified as a hazardous substance and banned

Credit: Vicor Corporation

A New (Better) Approach to Tin Whisker Mitigation

Most of the electronics industry by now knows about tin whiskers. They know whiskers are slim metallic filaments that emanate from the surface of tin platings. They know these filaments are conductive and can cause shorts across adjacent conductors. And they know that these shorts can cause some really bad failures (see nepp.nasa.gov/whisker/ for a list longer than you need). But, with all of this knowledge, the industry is still struggling on how to predict and prevent these "Nefarious Needles of Pain".

Credit: DfR Solutions

RESULTS of Searches for related keywords - "whister" (148)

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█ Printed Circuit Board Assembly & PCB Design Forum

Does conductive epoxy on a PCB affect ionography? --

Older gear MPM Speedline Accela VS. DEK 265 Horizon -- Thanks for your input, new to this industry and trying to learn. Which is a better machine for low volume high mix? I have the option to pick which path to start learning on MPM Speedline Accela or a DEK 265 Horizon Any pros / cons or input is appreciated.

SEARCH THE FORUM

ADD YOUR THOUGHTS ...

█ SMT, PCB Electronics Assembly Manufacturing Industry News

Count On Tools Announces Exclusive 20% Discount on Standard Nozzles for Leading SMT Brands Count On Tools, Inc. (COT) is excited to announce a limited-time promotion offering a 20 percent discount on all standard nozzles for Panasonic, I-Pulse, Hitachi, Hanwha, Fuji, Juki, Yamaha, ASM, Mirae, and Assembleon.... Count On Tools, Inc.
Revolutionize Storage with Intelligent SMD Tower - I.C.T-ISS2000 In the ever-evolving landscape of Surface Mount Technology (SMT), the I.C.T-ISS2000 stands out as a game-changer in Intelligent SMD Tower. Crafted in Europe, this cutting-edge system adheres to the highest safety standards, making it a reliable choice for safety-conscious electronics manufacturers.... I.C.T ( Dongguan ICT Technology Co., Ltd. )
IPC APEX EXPO 2024 Offers More Than 100 Technical Sessions in Electronics Manufacturing The industry's premier conference and exhibition for the electronics industry, IPC APEX EXPO 2024, features cutting-edge technical content directly influencing the $2 trillion global electronics manufacturing industry. Attendees will have more than 100 opportunities to update their technical knowledge during sessions at IPC APEX EXPO 2024 from April 6-11, 2024, in Anaheim, Calif.... Association Connecting Electronics Industries (IPC)

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█ SMT / PCB Products & Services

NEW SMT / PCB EQUIPMENT & SERVICES - For Sale

SELECTIVE SOLDERING

Pillarhouse Jade Handex

Pillarhouse USA

PCB INSPECTION

MV 7 OMNI 2D/3D In-Line AOI System

Mirtec

PCB SOFTWARE

ProntoTEST-FIXTURE - ATE Programming

Unisoft

PCB ASSEMBLY

PCB Fab & Assembly

Imagineering

REFLOW OVEN

Voidless / Vacuum Reflow Soldering Oven

Heller

Dispensing

Catalina Benchtop Dispense Robots

GPD Global

Printing

Full-auto SMT Stencil Printer I.C.T-P4034

Dongguan I.C.T

VIEW MORE NEW PRODUCTS...

█ SMT / PCB Assembly Equipment Auctions

AUCTION | Surplus to Creation Technologies SMT Facility

AUCTIONEER | The Branford Group

TYPE | Online Auction

SCHEDULE | Mon, Feb 12 to Wed, Feb 14, 2024

Auction Opening: Monday, February 12, 2024 9:00 AM (MST)

Begins Closing: Wednesday, February 14, 2024 10:00 AM (MST)

LOCATION | 1450 Mission Ave NE, Albuquerque, NM 87107 USA

█ Electronic Equipment Market

MARKET - Used Electronic Assembly Machines For Sale

Adhesive Dispensers

Musashi FAD2500

KD Electronics Ltd.

AOI INSPECTION

Viscom S3088 Ultra Chrome 3D AOI

Lewis & Clark Viscom S3088 AOI

Lewis & Clark

Soldering - Selective

Juki Cube 460

Baja Bid

PCB PRINTING

DEK NEOHORIZON 03iX

SMTUnion - DEK NEOHORIZON 03iX

SMTUnion

PCB AOI

YesTech YTV-2000 Series YTV-2050 AOI S

World Equipment Source - YesTech YTV-2050 AOI

World Equipment Source, LLC

MORE EQUIPMENT & PARTS...

SUBMIT YOUR RFQ ....

MARKET - Used PCB Assembly Equipment Wanted To Buy

Soldering - Reflow

10 Zone Reflow Oven

Baja Bid

P&P / FEEDERS

Assembleon MG-1R

World Equipment Source Assembleon MG-1R

World Equipment Source, LLC

PCB TEST

Agilent 3070

Lewis & Clark Agilent 3070

Lewis & Clark

PCB TEST

Agilent 3070

KD Electronics Agilent 3070

KD Electronics

SEE Buyers' Used Assembly Equipment Wants

█ Electronics Manufacturing & Assembly Events Calendar

EVENTS

Pan Pacific Strategic Electronics Symposium | January 29 to February 1, 2024

SMTA

Houston Chapter Hybrid Event: Increasing your Trade Show ROI | February 1, 2024

SMTA

Wine Down Wednesday: Enabling a Global Resilient Supply Chain with Technology Leadership | February 7, 2024

SMTA

Wafer-Level Packaging Symposium | February 14 to 16, 2024

SMTA

█ Electronics Manufacturing Training Courses & PCB Assembly Training

FIND TRAINING FOR:

IPC Certification

Soldering & Rework

PCB Design

Electronics Assembly

Electronics Inspection

Online Training

TRAINING - PCB Inspection Electronics Manufacturing Training Courses

IPC-A-610 Specialist Interactive PCB Inspection Lab (CIS or CIT Option) Certification Training Course

Multiple dates and locations. Check the link for details

EPTAC Corporation

TRAINING - PCB Rework and Hand Soldering Training Courses

Customizable Basic Hand Soldering

Multiple dates and locations. Check the link for details

Blackfox Training Institute, LLC

EPTAC Hand Soldering Certification Training Course

Multiple dates and locations. Check the link for details

EPTAC Corporation

TRAINING - Online Electronics Manufacturing and Assembly Training Courses

Reflow Soldering 101 Training Course

Surface Mount Technology Association (SMTA)

IPC/WHMA-A-620 Expert (CSE) Certification Training Course

EPTAC Corporation

IPC Certified Electronics Program Manager (CEPM) Training and Certification Program

Association Connecting Electronics Industries (IPC)

Component Placement 101 Training Course

Surface Mount Technology Association (SMTA)

ESD Control for Electronics Assembly

Association Connecting Electronics Industries (IPC)

MORE TRAINING COURSES...

█ Electronics Manufacturing & PCB Assembly Career Center

Job Needs & Wants

JOBS

YOUR job openings

Overseas SMT Engineer

All over the world, Alabama, USA

I.C.T ( Dongguan Intercontinental Technology Co., Ltd. )

SMT Engineer, Marketing Representative, Sales Representative, Business Assistant

All over the world, California, USA

I.C.T ( Dongguan Intercontinental Technology Co., Ltd. )

Installation Service Technician

Centennial, Colorado, USA

Vortex Industries

AOI Engineer

Hai Phong, Vietnam

Dongguan RuiHengHuaTai Electronic Co., Ltd

SMT Electronics Technician

Manchester, New Hampshire, USA

Intelligent Manufacturing Solutions

SMT Process Technician III

Racine, Wisconsin, USA

Cree Lighting

Experienced SAKI AOI programmer

All US, USA

AirDataIOT,LLC

Engineering Project Manager

Strongsville, Ohio, USA

Spartronics

Senior Quality Engineer

Williamsport, Pennsylvania, USA

Spartronics

Senior Systems Engineer

Strongsville, Ohio, USA

Spartronics

Procurement Specialist

Brooksville, Florida, USA

Spartronics

Buyer/Planner

Williamsport, Pennsylvania, USA

Spartronics

Corporate Director of Quality

Williamsport, Pennsylvania, USA

Spartronics

Automotive service Technician

Golden, CO, USA

Engage2excel

Program Manager

Williamsport, Pennsylvania, USA

Spartronics

RESUMES

YOUR resumes

POSITION: Equipment Incharge

JOB CATEGORY: Engineering , Production

CURRENT LOCATION: Tirupati, India

WILLING TO RELOCATE?: Not willing to relocate.

SUMMARY OF QUALIFICATIONS: 2 years experience on NeoLync in equipment incharge.

YOUR next job ... YOUR next employee ...

█ PCB Design & Assembly Industry Associations

Surface Mount Technology Association (SMTA)

SMTA 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 | Upcoming Events

Association Connecting Electronics Industries (IPC)

IPC 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 | Online Store | Upcoming Events

Editor - Dave "davef" Fish (submit your technical articles)

SMTnet.com, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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