Electronics Forum | Tue Sep 07 12:57:00 EDT 2010 | jrr3434
Thanks for the info mike. How well do these batch cleaners work with densely populated through hole boards that were solder with no clean flux? Is there a problem with water getting trapped under large capacitors? I'm using kester 959t for flux on b
Electronics Forum | Tue Jan 09 10:13:40 EST 2007 | slthomas
You could probably make do with two as long as you attach to the smallest part in a sparsely populated area and a large heavy part in a densely populated area to cover both ends of the spectrum. When I had a MOLE I used all 6. Now I use the 3 the ove
Electronics Forum | Fri May 05 11:11:05 EDT 2000 | Stefan Witte
The placement defect rate also depends on the shape of the components. 0402's have a higher defect rate than 0805's for example. If the board is very dense populated, chances are that a misplaced part knocks off another part and all of the sudden the
Electronics Forum | Tue Feb 11 11:16:46 EST 2003 | Chad
I believe I've seen some board houses advertise the ability to plate vias completely shut, so that they can be placed within the outlines of a pad without causing the problems you noted. I've seen this scheme used on very densely populated digital bo
Electronics Forum | Fri Mar 14 13:09:33 EST 2003 | Dman
Does anyone know of any free software that would allow an inspector to look for a reference designator on a densely-populated PCB? The software would need to accept a CAD pick'n'place file as input, and highlight the part when the inspector enters t
Electronics Forum | Fri Jun 04 20:08:13 EDT 2004 | Ken
Rick P. is the Assembleon local Field Service Engineer. He is very good. He is stationed in the Portland Metro area. Oregon and Washington have a very dense population of Philips (assembleon) machines. Extensive installation base. I recently in
Electronics Forum | Thu Apr 25 17:17:44 EDT 2019 | spitkis2
Years ago it was common to see 2-3mm keep out areas around BGAs. Now with boards being so densely populated there are no clearance minimums. Regardless if the machine is using convection or IR heating, parts can be reworked without affecting adjace
Electronics Forum | Wed Nov 21 15:02:46 EST 2007 | jlawson
From info I have been told from design standpoint, via in pads helps with managing EMC issues with working design, in particular for high speed digital/dense populated type PCB's. We had a manufacturing customer that had very low yield because of th
Electronics Forum | Mon Oct 04 15:10:42 EDT 2010 | 18424
Hi Michelle, Due to the dense population of through hole on some boards, after a 35 minute wash, some connectors or battery holders remain wet. Currently we put them into drying ovens at 70c for a Minimum of a half hour. We do occasionally air dry un
Electronics Forum | Fri Oct 18 07:56:26 EDT 2002 | cyber_wolf
I have a question to pose for all of you. We use BTU TRS ovens for all of our SMT reflow. Anyone that has had any experience with these ovens knows that they are large and the have a lot of " thermal mass" Which means to me that they are very stable
