Electronics Forum | Fri Feb 18 23:21:00 EST 2005 | JSS
Hi Everybody, Mostly customer asked about the solder paste height checking after printing process.Is it compulsory to check the height if we are using stainless steel stencil and metal blades in fully automatic printer.Any technical answer to their
Electronics Forum | Mon Feb 21 02:02:54 EST 2005 | JSS
First of all THANKS for thr reply. I totally agree with u that paste dried,stencil aperture clogged like probs comes during the production but we hv a visual inspection stage (with 5X illuminated lamp)after printing process and before inserting the
Electronics Forum | Mon Mar 02 11:27:51 EST 2009 | wrongway
Check stencil is their a lot of paste still on the stencil if so that is the extra thickness maybe add more pressure. check to see if board is coming up far enough to touch the bottom of the stencil.
Electronics Forum | Tue Feb 22 01:38:42 EST 2005 | JSS
We r using QFPs of 0.5mm pitch and r not getting any soldering prob at the end.But some new customer insists upon the thickness check of the solder paste after printing. At present we don't hv thickness checking system.We r controlling the amount of
Electronics Forum | Wed Mar 30 08:06:17 EST 2005 | davef
Considerations are: * If the nonwetting is component lot specific, the could be solderability issues with that lot. * If the nonwetting is is a broader based component issue, the solderability protection on the component may require a different reflo
Electronics Forum | Thu Mar 31 07:56:31 EST 2005 | cn
I agree with chuck, but would like to add. 2D is a great option and helps to keep your printing process in check, it will measure the x & y coverage on the pad. It will help you determin when your stencil aps become clogged or when the bottom of your
Electronics Forum | Tue Feb 22 08:40:12 EST 2005 | JB
A couple of features on your stencil printer that should help with a couple of potential printing processes: A temperature control unit and the automatic understencil cleaning with the chemical of your choice. That alone, will reduce the chances of
Electronics Forum | Sun Feb 27 16:25:51 EST 2005 | jakin
Hello my name is Jason. And I to work in electronics. I have recently had the same inquires by costumers about solder height to. Are these well-known customers like hp or micron? Cause it sounds like it to me. Who do you deal with that makes these in
Electronics Forum | Sat Feb 19 09:26:19 EST 2005 | davef
Your customer asks a reasonable question. How do you know that your: * Paste has not dried? * Stencil aperatures have not become clogged? * On and on ... Some agrue that printing is the most critical process and that it drives all down-stream failu
Electronics Forum | Wed Mar 30 01:01:10 EST 2005 | vicknesh28
All, Has there been any finding from the component point of view in terms of non wets after reflow and if yes, can anyone share what was improved on the component to reduce the non wet defective levels. What would be the contribution from the compon
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