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Reducing Solder Defects

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I thought this may be of interest to you. It may be a way to reduce or eliminate solder defects and rework in manufacturing.

Recent studies have shown it is possible to reduce solder defects by designing stencils to match the actual PCB’s instead of the design Gerber data.   Please visit the following link to an SMT Magazine article describing a study at Motorola where solder defects were reduced by 43% by designing stencils to match PCBs ! 

        SMT - Using Stencil: Design to Reduce SMT Defects*

ScanCAD has a system (ScanInspect VPI -"Virtual Product Inspection") that can generate Gerber files from a bare PCB. This file then can be used to manufacture a solder paste stencil that matches the solder pads exactly. The system is also capable of performing many different functions in a PCB assembly facility, such as:

• Design                    – Check Holes, Slots, Real Estate. Manipulate and
                                 resize pad sizes.

• Components         – Compare parts from Multi-vendors including shape,
                                color, size.

• Bare Boards         – FR4, Ceramic or Flex parts. Compare from multi-vendors.
                                Compare  to Gerber or to Stencil.

• Stencils/Screens – Detect stretch, wear, missing, blocked or damaged
                                apertures. Use for incoming inspection or in production
                                after cleaning.

• Wet Boards           – Compare paste or adhesive to Gerber, stencil or
                                Golden part.

• Loaded Boards   – Compare component locations, rotation, package type,
                                etc to CAD data. First Article Inspection !

• Create Through-Hole or SMT Assembly Programs from either Gerber data,
                                ASCII centroid data or scanned images of PCB’s, film,
                                stencils, etc.
   

 Systems cost less then an AOI,
are very easy to use and are based on a standard PC platform. 

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Internet demo is available to demonstrate the powerful capability of the ScanInspect VPI system without any travel expenses and costing only about an hour of your time. 
It allows you to see the actual system images and software menus “live” as the ScanInspect VPI system is operated at the ScanCAD headquarters location. 
Standard parts can be used or even your parts, if they are sent to ScanCAD ahead of time.  All that is required for an Internet demo is a high-speed Internet connection and a phone line for the audio portion of the meeting.
 

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Please Contact Us For More Information
or to Set Up an Online Demo:

Contact us at: jstimad@amtflorida.com
or reply to this e-mail

John Stimadorakis  727- 864-6054

AMT Corp.  
St. Petersburg, Florida
www.AMTFlorida.com