Electronics Forum | Mon Jun 18 10:11:52 EDT 2007 | dyoungquist
Almost every board/panel we build is double sided and we use an MPM SPM screen printer with no problems. The screen printer is not the cause. We have seen heavier parts fall off the first side when going through the reflow for the second side. We
Electronics Forum | Thu Sep 10 17:57:38 EDT 1998 | Earl Moon
| I was wanting to know if double sided reflow can be done with a metal plated BGA on topside. We would be running bottom side first. My boss seems to think the only way it can be done is by placing glue dots on the bottomside compoents because the
Electronics Forum | Fri Aug 07 10:14:43 EDT 1998 | RWW
| I'm currently running a double sided paste smt board loaded with 0603's, on the secondary side. Many of the 0603 devices tombstone during reflow if the parts are not perfectly centered on the pads. Is this caused by the .008 foil thickness? Has any
Electronics Forum | Thu Mar 17 10:56:24 EST 2005 | jmedernach
Hi John, This problem is interesting. I've never had a problem with solder shorts caused by subjecting a device to reflow a second time. I've built many double sided SMT assemblies with fine pitch devices on top and bottom. Some things to possibly
Electronics Forum | Wed Apr 06 12:36:53 EDT 2005 | smt_rookie
I've tried a different lot of the same double header connector (yes its double level right angled header conector) twice but nothing has improved. I've also suspected that top row of the connector has greater heat sinking capacity (which should hold
Electronics Forum | Wed Mar 27 01:06:12 EST 2002 | ianchan
Hi Guys, We are using two types of support Jigs for our PCB boards, during the paste printing, chip shooter, and IC mounting. The two types of support Jigs are : 1) "self-fabricated" aluminium support Blocks 2) "off shelf purchased" support Pins T
Electronics Forum | Fri Apr 21 12:43:51 EDT 2000 | David
We are going to hand place through hole connectors by screening them top side in a double sided reflow board. I saw this done before sucessfully on a daily basis but is there anyone with a paper or specs as to what aperture size, any special pad cons
Electronics Forum | Mon Feb 19 11:45:09 EST 2001 | sallyt
We are using a �spray� type stencil cleaner and hot DI water to clean water washable solder paste. I want to use the stencil cleaner to also clean misprinted PCBs. However, we consistently find solder balls on side A of a double-sided misprint. We
Electronics Forum | Tue Dec 29 09:42:55 EST 1998 | Bob Willis
I have been working on this process for a couple of weeks and I know that there are a few other companies in Europe and Japan who are also playing. Is there any one who has been running this process in production ? Yes I do mean reflowing both side
Electronics Forum | Wed Aug 05 20:48:50 EDT 1998 | Ron Costa
I'm currently running a double sided paste smt board loaded with 0603's, on the secondary side. Many of the 0603 devices tombstone during reflow if the parts are not perfectly centered on the pads. Is this caused by the .008 foil thickness? Has anyon
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