Electronics Forum | Mon Feb 19 13:04:17 EST 2001 | billschreiber
The ultrasonic frequency used in today�s stencil cleaners is usually a 40 kHz �sweep� frequency (also used on semiconductors and other sensitive cleaning applications). This frequency is not low enough to cause stencil damage (the lower the frequen
Electronics Forum | Tue Apr 27 16:37:16 EDT 2004 | babe
Well I would think that the heat slug would work to a point. Obviously made to dissipate heat from the component. That said it wouldn't hurt to cover that also with aluminum foil. Your not wrapping a present, your simply tenting the component. IR wil
Electronics Forum | Thu Sep 25 18:31:24 EDT 2003 | davef
Denis: You could be correct about metal reflecting IR. When we use our old IR station, we place pieces of aluminum foil around the component to be removed to protect the near-by components.
Electronics Forum | Mon Apr 26 16:59:11 EDT 2004 | babe
Any concerns on the IR in melting connectors etc. simply cover the part with aluminum foil. That will prevent any heat from attacking the component. The Ersa unit is in my mind the best bang for the buck.
Electronics Forum | Fri Oct 31 09:57:34 EDT 2008 | sys_steven
That's an amazing shot in the Dark. Never had to put in a CD to make it work....But, you could also try to add aluminum foil to the light tower to improve the reception, maybe that will help! Or even bring in someone to meditate over the machine wh
Electronics Forum | Sat Aug 18 08:40:34 EDT 2007 | davef
Here's how to double reflow your QFP: * Reflow the first side with the QFP according to plan. * Paste second side and place components according to plan. * Lightly crinkle a small, QFP-size piece of aluminum foil. [Note: the degree of crinklization
Electronics Forum | Wed Nov 20 16:40:32 EST 2002 | csimfgeng
Sign makers utilize a material called "Scotch-Cal" and "Scotch-Brite" in making decals used in outdoor environments. Material similar to this comes in metallic silver and gold. Pieces of this can be economically die-cut and affixed to your PC Board
Electronics Forum | Fri May 29 23:19:46 EDT 2009 | isd_jwendell
I too have heard of the ESD problem when using aerosol spray conformal coating, but I haven't found any documentation. I have been spraying SR conformal coating for ~ 10,000 boards with no failures due to the coating. The person spraying is grounded
Electronics Forum | Wed Jun 13 14:48:48 EDT 2007 | rgduval
Is there a sort of standard method to prevent part loss in reflow? I've had a couple of situations come up recently where we've lost some parts during second-side processing. We're running an Heller 1800, with a mesh belt. Most items process fine,
Electronics Forum | Sat Jan 05 10:21:29 EST 2002 | Todd Murphy
Has anyone ever had any solder related problems with the Motorola 860 BGA? We are currently using the 860 on several of our products and some of the solder joints for the 860 look like crumpled aluminum foil when viewed with the Ersa Scope. Does anyo
