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width="154" height="34" border="0" onload=""></a></td> <td><a href="mailto:empf@aciusa.org" target="_top" onClick="MM_nbGroup('down','group1','contact','',1)" onMouseOver="MM_nbGroup('over','contact','../../nav/images/empfasis_nav_06-over.gif','',1)" onMouseOut="MM_nbGroup('out')"><img src="../../nav/images/empfasis_nav_06.gif" alt="" name="contact" width="74" height="34" border="0" onload=""></a></td> </tr> </table> <!-- #EndLibraryItem --></div> <table width="100%" border="0"> <tr> <td width="85%" class="style17">A publication of the National Electronics Manufacturing Center of Excellence</td> <!-- InstanceBeginEditable name="Date" --><td width="15%"><div align="right">July 2010 </div></td> <!-- InstanceEndEditable --> </tr> </table> <table width="100%" border="0"> <tr> <td width="237" valign="top"> <div align="center"> <table width="237" height="1280" border="0" cellpadding="30" cellspacing="0"> <tr> <td width="237" valign="top" 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align="left">&nbsp;</p></td> </tr> <tr> <td valign="top" style="padding-left:10px"><!-- InstanceBeginEditable name="Article_5" --> <p align="left"><a href="manf-corner-710.html">Manufacturer&rsquo;s Corner: MPM of Speedline Technologies</a></p> <!-- InstanceEndEditable --></td> </tr> <tr> <td valign="top"><p align="left">&nbsp;</p></td> </tr> <tr> <td valign="top" style="padding-left:10px"><!-- InstanceBeginEditable name="Article_6" --> <p align="left"><a href="ipc.html">IPC/WHMA-A-620A CIS Training and Certification</a></p> <!-- InstanceEndEditable --></td> </tr> <tr> <td valign="top"><p align="left">&nbsp;</p></td> </tr> <tr> <td valign="top" style="padding-left:10px"><!-- InstanceBeginEditable name="Article_7" --> <a href="http://store.aciusa.org">EMTC Online Registration</a><a href="guest.html"></a> <!-- InstanceEndEditable --></td> </tr> <tr> <td valign="top"><p align="left">&nbsp;</p></td> </tr> <tr> <td valign="top" style="padding-left:10px"><!-- InstanceBeginEditable name="Article_8" --><a href="../html/empfasis/emlcupcoming.pdf">Training Center Course Schedule</a> <!-- InstanceEndEditable --></td> </tr> </table> <br> <br> <hr align="center" size="1"> <br> <a href="http://store.aciusa.org"><img src="http://www.aciusa.org/images/lower-pricing-ad.gif" alt="Discount pricing on IPC training course J-STD-001, 610, 600, 7711, 7712" width="150" height="288" border="1"></a> <a href="http://www.empf.org/empfasis/subscribe.htm"> </a> <p class="style9"><script language="JavaScript"> <!-- function random_imglink(){ var myimages=new Array() myimages[1]="http://www.aciusa.org/wwwaci/html/random/boot.gif" myimages[2]="http://www.aciusa.org/wwwaci/html/random/lead.gif" myimages[3]="http://www.aciusa.org/wwwaci/html/random/help.gif" myimages[4]="http://www.aciusa.org/wwwaci/html/random/service.gif" myimages[5]="http://www.empf.org/empfasis/archive/images/subscribe2.gif" var imagelinks=new Array() imagelinks[1]="http://www.aciusa.org/courses/train_boot.htm" imagelinks[2]="http://www.empf.org/empfasis/leadfree.htm" imagelinks[3]="http://www.empf.org/helpline/helpline.htm" imagelinks[4]="http://www.aciusa.org/ana/ana_home.htm" imagelinks[5]="http://www.empf.org/empfasis/subscribe.htm" var ry=Math.floor(Math.random()*myimages.length) if (ry==0) ry=1 document.write('<a href='+'"'+imagelinks[ry]+'"'+'><img src="'+myimages[ry]+'" border=0></a>') } random_imglink() //--> </script></p> </div></td> </tr> <tr> <td colspan="2"><div align="center"><span class="style5">ACI Technologies Inc.</span><br> One International Plaza<br> Suite 600 <br> Philadelphia, PA 19113 <br> (610) 362-1200 <br> <span class="style6">FAX: </span>(610) 362-1290<br> <span class="style6">HELPLINE: </span>(610) 362-1320<br> <span class="style6">WEBSITE: </span><a href="http://www.empf.org">www.empf.org</a><br> <a href="http://www.aciusa.org">www.aciusa.org</a></div></td> </tr> </table> <p>&nbsp;</p> <p><br> <br> </p> <div align="center"> <p align="center" class="style7">Michael D. Frederickson<br> <strong><em>EMPF Director </em></strong><br> <br> Barry Thaler, PhD.<br> bthaler@aciusa.org <br> <strong><em>Empfasis Technical Editor<br> </em></strong><br> Paul Bratt<br> pbratt@aciusa.org <br> <strong><em>Empfasis Editor</em></strong><br> </p> <p align="center" class="style7"><img src="http://www.empf.org/empfasis/archive/images/iab_sm.gif" alt="IAB" width="100" height="52"><br> <span class="style9">Industrial Advisory Board</span><br> <span class="style14"><em>Gerald R. Aschoff</em>, The Boeing Company<br> <em>Dennis M. Kox</em>, Raytheon<br> <em>Gregory X. Krieger</em>, BAE Systems<br> <em>Edward A. Morris</em>, Lockheed Martin<br> <em>Jane Krueger </em>, Rockwell Collins<br> <em>Gary Kirchner</em>, Honeywell<br> <em>Andrew Paradise</em>, Northrop Grumman<br> <em>Richard Kidwell </em>, ITT Industries</span></p> </div> <p align="center" class="style7"><br> </p> </div> </td> </tr> </table> </div></td> <!-- InstanceBeginEditable name="Body1" --><td width="70%" rowspan="2" valign="top"><div class="body_style" id="body_content"> <p><img src="images/manf.gif" alt="title"></p> <p class="body_text"><span class="style20">T</span>he EMPF is currently executing a Defense Acquisition Challenge Program (DACP) whose goal is to provide improvements to electronic hardware that is currently being acquired by the Department of Defense for the continuing Land Warrior program (Figure 1-1). <br /><br /> <p>Excellent stencil printing sets the foundation for a successful circuit board build. The performance capabilities of MPM brand's Momentum stencil printer from Speedline Technology addresses both the current and future requirements of surface mount stencil printing (Figure 5-1). The continuing trend toward smaller components, shorter job runs, and the necessity of high throughput have driven the design of the Momentum stencil printer.</p> <p align="center"><img src="images/fig5-1.gif"></p> <p>Smaller components require exceptional attention to the accurate alignment of stencil to circuit board while shorter job runs require faster changeover and set-up times. High production rates translate to near zero down time and high speed. The small pads on the circuit board require small apertures on the stencil which are more prone to solder paste build-up. This build-up results in incomplete coverage of paste on the circuit board pad. Removing this paste build-up must be performed automatically to assure high quality and production rates. These requirements are addressed by the Speedline Momentum.</p> <p>The automatic stencil printer is the first step in assembling surface mount circuit boards. Circuit boards are automatically fed into the stencil printer and precisely indexed under the stencil. Excellent alignment of the circuit board pads under the stencil apertures is absolutely critical for transferring the paste to the circuit board. Using a computerized vision system composed of telemetric lenses and a high speed camera system, the Momentum's positioning motors can align the circuit board under the stencil to within 12.5 microns (.0005 inches) with a six-sigma repeatability (only 3.4 defects per million attempts).</p> <p>Circuit board flatness is assured by holding the boards by the edges without top clamps and using an automatic support pin for large boards (Figure 5-2). This system assures quick and accurate product changeover. The stencil apertures are perfectly sized to match the size of the pads on the circuit board and must remain clean and unclogged during production. Especially with fine pitch and micro ball grid arrays (BGAs), any build-up of paste in an aperture restricts the transfer of paste through that stencil and pad coverage becomes incomplete. An underside computer controlled stencil wiping system uses a wet/dry approach to keep the stencil apertures solder paste free.</p> <p align="center"><img src="images/fig5-2.gif"></p> <p>A real time inspection system confirms the quality and completeness of solder paste coverage of the pad. The coverage details can be viewed on the computer monitor and stored on a board by board basis. This information can form the foundation for a statistical analysis of the process. The MPM Momentum from Speedline is successfully designed and constructed to satisfy the critical requirements for applying solder paste to the circuit board.</p> <ul> <li>A solid heavy weldment provides a stable platform for board alignment. <li>High performance cameras and lens system provide images of fine pitch pads that are processed by the pattern recognition system. <li>Direct drive motors index the circuit boards quickly and precisely. <li>Underside stencil cleaning maintains the apertures on the stencil in a clean and unclogged state. </ul> <p>For more information or a demonstration of the Speedline MPM Momentum stencil printer at the EMPF, please contact Mike Prestoy at 610.362.1200, extension 241.</p> <p class="body_text"><img src="../../archive/updated/mprestoy.gif" width="420" height="97"></p> </div> </td> <!-- InstanceEndEditable --> </tr> <tr> </tr> </table> <br> <table width="100%" border="0"> <tr> <td colspan="2"><div align="center"> <p><em>The EMPF is a U.S. Navy-sponsored National Electronics Manufacturing Center of Excellence focused on the development,<br> application, and transfer of new electronics manufacturing technology by partnering with industry,<br> academia, and government centers and laboratories in the U.S</em></p> </div></td> </tr> <tr> <td class="footer">ACI Technologies, Inc. - - <a href="http://www.aciusa.org">www.aciusa.org</a> - - (610)362-1200</td> <td><div align="right"><a href="http://www.navymantech.com"><img src="http://www.empf.org/empfasis/archive/images/mantech.gif" width="144" height="42" border="0"></a></div></td> </tr> </table> <div align="right"> <!-- Start of StatCounter Code --> <script type="text/javascript" language="javascript"> var sc_project=350643; var sc_partition=1; </script> <script type="text/javascript" language="javascript" src="http://www.statcounter.com/counter/counter.js"></script> <noscript> <a href="http://www.statcounter.com/free_hit_counter.html" target="_blank"><img src="http://c2.statcounter.com/counter.php?sc_project=350643&amp;amp;java=0" alt="hit counter" border="0"></a> </noscript> <a href="http://www.empf.org/sitemap.htm"><em>[site map] </em></a> <!-- End of StatCounter Code --> <!-- Start of StatCounter Code --> <script type="text/javascript" language="javascript"> var sc_project=1902214; var sc_invisible=1; var sc_partition=17; var sc_security="759b802c"; </script> <script type="text/javascript" language="javascript" src="http://www.statcounter.com/counter/counter.js"></script><noscript><a href="http://www.statcounter.com/" target="_blank"><img src="http://c18.statcounter.com/counter.php?sc_project=1902214&java=0&security=759b802c&invisible=1" alt="website statistics" border="0"></a> </noscript> <!-- End of StatCounter Code --> </div> </body> <!-- InstanceEnd --></html>