mobile | classic
Dataweek Electronics & Communications Technology Magazine





Follow us on:
Follow us on Facebook Share via Twitter Share via LinkedIn


Search...

Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2017


 

The problem of 'tin whiskers' cannot be neglected
28 July 2004, Manufacturing / Production Technology, Hardware & Services

The European Union has enacted legislation known as the Restriction of certain Hazardous Substances (RoHS) and Waste Electrical and Electronic Equipment (WEEE) Directives.

The EU has set June 2006 as the deadline for electronic equipment suppliers to eliminate most uses of Pb from their products.

With respect to factors such as solderability, ease of manufacture and compatibility with existing assembly methods, pure tin plating is seen by the industry as a potentially simple and cost effective alternative.

However, there is another critical problem out there, and that is - 'tin (Sn) whiskers'.

Examples of tin wiskers
Examples of tin wiskers

What are tin whiskers?

Tin whiskers are electrically conductive, 'hair-like' crystalline structures of tin that may grow from mostly pure tin finished-surfaces. Tin whiskers have been observed to grow to lengths of several millimeters and in rare instances, to lengths of up to 10 mm. Under some electrical/atmospheric conditions, whisker shorts may vaporise into a conductive plasma of metal ions. An arc forms through the plasma that is capable of carrying hundreds of amps with resulting catastrophic damage. Numerous electronic system failures have been attributed to short circuits caused by tin whiskers that bridge closely-spaced circuit elements maintained at different electrical potentials.

Typical characteristics of tin whiskers: growth rate 0,03 to 9 mm/yr; incubation period from days to years; whisker length typically <1 mm and diameter 0,006 µm to 10 µm; electric conductivity in atmosphere, 75 mA max (with whisker dia. 4 µm); in a vacuum whiskers may vaporise into conductive plasma that can carry hundreds of amps; growth mechanism(s) - unknown.

Hi-Q Electronics, local representative for Taiwan Semiconductor, has a presentation available that describes the issue of tin whiskers. Interested readers may contact Stephen Delport, stephen@hi-q.co.za or 021 595 1307.


Credit(s)
Supplied By: Hi-Q Electronics
Tel: +27 21 595 1307
Fax: +27 21 595 3820
Email: sales@hi-q.co.za
www: www.hi-q.co.za
  Share on Facebook Share via Twitter Share via LinkedIn    

Further reading:

  • From zero to 100 million placements a month in 25 years
    18 July 2018, Microtronix Manufacturing, Manufacturing / Production Technology, Hardware & Services
    Microtronix CEO, Mike Goodyer, tells the story of the company’s remarkable journey to becoming an electronics manufacturing force to be reckoned with.
  • Designing high-speed PCBs using four layers
    18 July 2018, EDA Technologies, This Week's Editor's Pick, Manufacturing / Production Technology, Hardware & Services
    There is an ever-growing demand for high-performance electronics products to use printed circuit boards with an absolute minimum layer count.
  • Flying probe tester
    18 July 2018, MyKay Tronics, Manufacturing / Production Technology, Hardware & Services, Test & Measurement
    The Flying Probe S2 testers from SPEA are designed for the highly demanding test requirements of today’s electronics. Their entire force/measurement unit has been placed directly on the axis, so that ...
  • Contactless SMD component counter
    18 July 2018, Testerion, Manufacturing / Production Technology, Hardware & Services
    The XRHCount from VisiConsult is a contactless counting system for surface mounted electronic components. To prevent production line stops the system delivers the exact amount of components directly into ...
  • Factory in a box
    18 July 2018, MyKay Tronics, Manufacturing / Production Technology, Hardware & Services
    Mycronic has joined a Nokia-led group of 12 electronics industry players to offer a plug-and-play ‘Factory in a Box’ mobile solution for next-generation electronics assembly. The fully automated in-line ...
  • Printer for professional 3D printing
    18 July 2018, RS Components (SA), Manufacturing / Production Technology, Hardware & Services
    The Ultimaker S5 3D printer targets the professional end of the market across a number of applications and meets engineering requirements from the creation of prototypes to full end-use, industrial-grade ...
  • Cleaning agent concentration tester
    18 July 2018, Electronic Industry Supplies, Manufacturing / Production Technology, Hardware & Services
    The Zestron EYE product family celebrated its latest automated cleaning agent monitoring solution for PCB and stencil cleaning processes at SMT Hybrid & Packaging 2018 in Nuremberg. In addition to the ...
  • Automated fluid dispensing platform
    18 July 2018, Techmet , Manufacturing / Production Technology, Hardware & Services
    Nordson ASYMTEK’s Helios SD-960 series is a new automated dispensing system for medium and bulk volume deposits of single- (1K) and two-component (2K) materials in electronics manufacturing and printed ...
  • Soldering station for heavy-duty production
    18 July 2018, MyKay Tronics, Manufacturing / Production Technology, Hardware & Services
    PACE Worldwide introduced the ADS200, a new high-power, low-cost production soldering station, at the IPC APEX Expo 2018. The ADS200 features the new TD-200 Cool-Touch Handpiece, with its sleek and ...
  • Fused filament 3D printer
    13 June 2018, RS Components (SA), Manufacturing / Production Technology, Hardware & Services
    The new easy-to use RS Pro iTX 3D printer from RS Components targets a wide range of users in manufacturing and many other commercial and business applications, as well as being suitable for educational ...
  • Newest Yamaha SMT machines shown off
    13 June 2018, Truth Electronic Manufacturing, Manufacturing / Production Technology, Hardware & Services
    Yamaha Motor Europe debuted new printing, 3D print inspection and mounting machines at this year’s SMT Hybrid Packaging show in Nuremberg, all featuring innovations to boost productivity and efficiency. Headlining ...
  • Enabling power electronics advancement through thermal management
    13 June 2018, Vepac Electronics, Manufacturing / Production Technology, Hardware & Services, Power Electronics / Power Management
    From power management and distribution of renewable energy sources, through to electric vehicle development and even wireless phone charging, power electronics and associated research is a dominant trend. ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    Classic | Mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.