Electronics Forum | Sat Oct 12 06:43:49 EDT 2002 | davef
Alternatives to consider are: * Opening-up your stencil aperture put-down more paste to compensate for the amount that is being used to fill the via. * Relaying-out the board to plug and plate over the via. * Relaying-out the board to move the via fr
Electronics Forum | Sat Apr 03 05:21:33 EST 2004 | mattkehoe
There is a method for VIP you may not be familiar with. I dont want to go into depth here but check out http://www.sipad.com/sipadvip.htm and contact me off line if you want more info. Good luck. mk
Electronics Forum | Thu Jan 19 12:38:03 EST 2012 | cobham1
I am wondering if the failurs that people see are discovered right away or when the units are out in the field. Reason I ask this follow up question is the units that are having problems are all returns from our customers. Is there a way to check for
Electronics Forum | Wed Jan 11 14:54:36 EST 2012 | cobham1
With a large number of you out there building rigid-flex boards. I am wondering first what kind of profile do you use and what are you peak temps. I ask these questions because we are finding that our boards have a high moisture level and we are also
Electronics Forum | Thu May 20 07:53:55 EDT 1999 | Chris Nuttall
| | We care currently running into problems during our plug via process: | | At the moment we plug prior to soldermask (LPISM) using epoxy resin - plugging takes place from the component side - however we are seeing solderballs after solder level.Thi
Electronics Forum | Tue Sep 19 00:35:54 EDT 2006 | darby
Fred, We receive ENIG pcbs in vac-formed bubble wrap with ,of all things, polstyrene packing! Despite my long-lasting complaints nothing has changed. BUT - I have never really had a problem with any of these PCBS. There are no moisture, salt or any o
Electronics Forum | Tue Feb 01 21:53:06 EST 2000 | Dave F
Emmanuel: You have choices to prevent the solder paste from flowing to the second side during reflow: 1 Have your board fabricator plug the vias. 2 Put a temporary solder mask on the secondary side vias. 3 Have your designer relay-out the vias unde
Electronics Forum | Wed Jul 23 03:04:57 EDT 2008 | gfro
Hello, We are using a PCB with thickness 3.2mm 4 layer and lot of through hole via's of diameter 0.4mm. We specified our PCB vendor to do plugging. Now we have big problems, that after 1..4 weeks we measure a low resistance between track's/via's of
Electronics Forum | Wed Oct 06 04:23:09 EDT 1999 | Brian
| | I am a new employee at a company that has had a large turnover of employees over the past year. I am working on a board (components on one side only), the engineer (he is also new ) wants to use an .035 pad with a .021 dia. hole, there are no via
Electronics Forum | Thu Jan 06 16:11:07 EST 2005 | Chunks
It appears your board house is having a problem with the solder resist (mask). From the couple pix it appear that the holes are being plugged by the mask, so your HASL is not able to be blown out during the hot knife process. Time to call your boar
