Solder Squeeze Out on Underfilled Boards Solder migration or Squeeze Out can be seen when solder reflows on packages which are underfilled and is feature on the NPL Defect Database and shows you what is happening. The video sequence of the BGA with underfill and solder being squeezed out was taken on a Dage X-Ray system with reflow video simulator The video is just one of the Defect of the Month videos featured by IPC, SMTA and Circuits Assembly to help provide better understanding of process issues and help support training of younger engineers https://youtu.be/ZTF9faL0Qpw Past Defect of the Month pages are available online at Circuits Assembly magazine or the videos at https://www.youtube.com/user/MrBobwillis The defect database is free to use or add defects and can be accessed via http://defectsdatabase.npl.co.uk In addition the database includes 100’s of the NPL reports that can be downloaded free Bob Willis - bob@bobwillis.co.uk

Teams playing at Southend in the Essex Tournament, hot day, hot skills and fun for all in the sun

Poor Printer Set-Up and Avoiding Scrap Its perfectly possible to print or set up a printer poorly it happens but throwing the boards away rather than cleaning them is very wasteful when there are other solutions. PCB suppliers spend a lot of time and effort making boards there is always a better way Helping print staff correctly print paste is simple and you can have a copy of our guide bob@bobwillis.co.uk The video is just on of the Defect of the Month videos featured by IPC, SMTA and Circuits Assembly to help provide better understanding of process issues and help support training of younger engineers Past Defect of the Month pages are available online at Circuits Assembly magazine or the videos at https://www.youtube.com/user/MrBobwillis The defect database is free to use or add defects and can be accessed via http://defectsdatabase.npl.co.uk In addition the database includes 100’s of the NPL reports that can be downloaded free

Some action from the teams playing in Essex Tournament

Head in Pillow or Head on Pillow videos feature on the NPL Defect Database show you what is happening. The video is just one of the Defect of the Month videos featured by IPC, SMTA and Circuits Assembly to help provide better understanding of process issues and help support training of younger engineers Past Defect of the Month magazine pages are available online at Circuits Assembly magazine or the videos at https://www.youtube.com/user/MrBobwillis The defect database is free to use or add defects and can be accessed via http://defectsdatabase.npl.co.uk In addition the database includes 100’s of the NPL reports that can be downloaded free Bob Willis bob@bobwillis.co.uk

Action from matches in the Essex League in April

Here is one of the latest books to be reviewed for the industry. We have many titles we have reviewed and featured on line for IPC, SMTA and Circuits Assembly magazine plus our top ten books for manufacture The latest titles include 3D Microelectronic Packaging Fundamentals to Applications Yan Li and Deepak Goyal Published by Springer springer.com