According to Bob Willis, NPL process defects database consultant, the advent of lead-free technology made every step of the assembly process more difficult. "Common process problems today relate to the correct selection of printed board materials, surface finishes and soldering materials," says Willis. "While some defects are cosmetic, others have significant reliability implications. Companies incur a great deal of cost if they can't distinguish between the different types." Willis estimates that 30 percent of printed board defects relate to surface finishes and 38 percent of component problems are related to ball grid arrays. Queries about BGAs top the searches in the NPL database.
During the webinar, Willis will share common problems, helpful solutions and ways to investigate the root causes. The webinar will cover the most frequent defect types; how to monitor process defect levels, record defects for investigation, and coordinate process parameters; the most common wave, selective and reflow soldering defects; and how to find defect causes and cures.
Participants can e-mail their problems and photos in advance of the webinar for discussion and resolution to firstname.lastname@example.org. To sign up for the free webinar, visit http://www.ipc.org/defects-registration. To calculate the time in your area, visit http://www.worldtimeserver.com and use United States/Illinois time at 12:00 pm for comparison.
In April, Willis will staff a free process defects clinic at IPC APEX EXPO, taking place at the Mandalay Bay Resort & Convention Center in Las Vegas. Over three days, April 12–14, 2011, the clinic in booth 217 will help identify process problems for visitors and provide suggested solutions. Attendees of the event are invited to bring electronic assemblies for examination or process problems for discussion. Pre-register for free exhibit hall admission to IPC APEX EXPO and the on-site process defects clinic at http://www.ipcapexexpo.org/register.
IPC (www.IPC.org) is a global trade association based in Bannockburn, Ill., dedicated to the competitive excellence and financial success of its 2,700 member companies which represent all facets of the electronics industry, including design, printed board manufacturing, electronics assembly and test. As a member-driven organization and leading source for industry standards, training, market research and public policy advocacy, IPC supports programs to meet the needs of an estimated $1.7 trillion global electronics industry. IPC maintains additional offices in Taos, N.M.; Arlington, Va.; Garden Grove, Calif.; Stockholm, Sweden; Moscow, Russia; Bangalore, India; and Shanghai, Shenzhen and Beijing, China.
The National Physical Laboratory (www.npl.co.uk) is the UK's National Measurement Institute and is a world-leading centre of excellence in developing and applying the most accurate measurement standards, science and technology.