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Improving SMT Stencil Printing Yields

Presenter: Chrys Shea
Company: Shea Engineering Services
Date Published: 4/11/2013

Description: Do you want to:
  • Increase your solder paste print yields?
  • Improve your end of line yields?
  • Develop your workforce’s knowledge of the printing process?
  • Learn troubleshooting skills to resolve printing problems?

    This 2-part webcast begins with a review of the basic mechanics of solder paste printing and the key elements of the process. The first portion continues with the general steps used to check a process that is not producing good prints, and then moves into specific defects like solder bridges, insufficient deposits, and poor print definition, showing images of the defects and discussing the most common causes of them in a typical production environment. The May, 2012 SMTA Webinar titled “Troubleshooting the Stencil Printing Process” presented similar content.

    The second portion addresses process improvement techniques and how to employ the analytical capabilities of automated solder paste inspection systems to boost yields. It reviews simple experiments that can be performed quickly during production breaks to improve printing processes and prevent print defects from occurring.

    What You Will Learn in Part 1:

  • Solder paste properties
  • Key elements of the process

  • Overall system check
  • Investigating specific defect modes

    What You Will Learn in Part 2:
    Automated Solder Paste Inspection

  • How it works
  • Analyzing the data it generates

    Stencil Tests
  • Electroform vs stainless steel and others
  • Performance-improving coatings
  • Vendor selection qualification

    Solder Paste Powder Size
  • Type 3, 4 or 5 effect on print performance

    Process Setup
  • Wipe frequency & sequence, support tooling

    Who should attend:
    This webtorial is designed to provide practical, useful troubleshooting and process improvement skills for beginner to intermediate level SMT process engineers, technicians or production support personnel.

    Instructor Bio:
    Chrys Shea is the President of Shea Engineering Services, a consulting firm that produces technical studies and communications tools for the electronics manufacturing industry. With several hundred publications to her credit, Chrys leverages her 20+ years of process engineering and management experience to create documents, presentations, web pages and other items that deliver complex technical topics clearly and effectively.

    Chrys is a favorite speaker at SMTA events, and has twice received the SMTAI “Best of Conference” award for her work on solder paste printing. In 2012 she was honored with the SMTA “Member of Technical Distinction” award.

    Chrys earned her B.S. in Mechanical Engineering from the University of Massachusetts and her M.S. in Manufacturing Engineering from the University of Rhode Island, and is a past president of the Philadelphia SMTA Chapter. She launched Shea Engineering services in 2008. Contact Chrys at Chrys@sheaengineering.com or (609) 239-2995

  • Key Words: 

    Stencil, Printing, SMT, Print Yields

      Members: $200.00 (Log on to receive the member rate)
      Non-Members: $300.00

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