Electronics Forum | Fri Apr 15 13:46:50 EDT 2005 | steve
They can be expensive and if your using water soluble chemistry you will have to immerse the pre-form into flux. Asking the vendor to provide flux with the pre-form I believe it would dry out prior to use.
Electronics Forum | Fri Apr 15 16:14:49 EDT 2005 | davef
Jim Zanolli of Teka Interconnect did an "OnBoard Forum" a couple of years ago [ http://www.smtnet.com/forums/index.cfm?CFApp=2&forum_idx=44 ]. He certainly would be a good point of contact.
Electronics Forum | Tue Apr 19 09:09:28 EDT 2005 | russ
Here is one reason- It eliminates the viscosity change during printing operation from the paste warming up and getting thinner. I would contact your paste supplier and have them give you the full list.
Electronics Forum | Fri Apr 22 19:43:01 EDT 2005 | steve
And don't re-refrigerate the paste. It's fine left out at room temperature and sealed. If you want to know why simply ask and the next 8 respondants will tell you.
Electronics Forum | Mon Apr 25 07:31:35 EDT 2005 | jdengler
As Steve said do not re-refrigerate. You can also take the paste out early. We remove enough paste from the refrigerator for a full days work around noon the day before we use it. Jerry
Electronics Forum | Thu Apr 21 08:45:53 EDT 2005 | davef
Top 10 products relating to solder paste are: * Printer * Stencil * Stencil storage rack * Squeegee * Squeegee holder * Under stencil wipe * Under stencil cleaning fluid * Stencil cleaner * Dispenser * Paste stirrer * Used paste / empty paste contain
Electronics Forum | Fri Apr 22 11:27:01 EDT 2005 | ddennison
Go to the following web site: http://www.pro-mation-inc.com/ Contact: Gary Goldberg at 847-812-1289 if you have any questions!
Electronics Forum | Thu Apr 21 14:06:28 EDT 2005 | russ
Dang Patrick, I'm going to have to agree with you again. The design needs to be corrected. This multiple footprint is a common thing nowadays but the designers need to understand the dynamics of reflow and such. PWH - Why would this mask need to
Electronics Forum | Thu Apr 21 18:14:56 EDT 2005 | paulhaines2000
Not sure why - all I know is customer will not allow any foreign material outside of what was intended in design. These are large RF boards and maybe they are afraid this will attract contamination that will affect performance???
Electronics Forum | Fri Apr 22 19:36:04 EDT 2005 | steve
Hey Chunks, nice name by the way. SMT adhesive, I'm familiar with Loctite anyone else? Only because Loctite is expensive.