Electronics Forum | Thu May 18 10:20:55 EDT 2006 | slthomas
Russ asks good questions and I think Chunks pretty much nailed it. Aspect ratio (aperture width/stencil thickness) s/b 1.2 minimum (I like 1.5 if I can get it). If your aperture width = lead width (.008"), yours is 1. Tough to get consistent paste r
Electronics Forum | Mon Dec 20 19:09:54 EST 1999 | Chris
If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev
Electronics Forum | Mon Aug 06 10:03:01 EDT 2007 | slthomas
I agree with jdengler on the rotary table being skewed. You need a couple of dowel pins (1 1/2" long x 1/4" dia., I think) to align that disk. Each idler is held on an eccentric cam and can be adjusted to square up the rotary table by dropping the do
Electronics Forum | Fri Jun 18 11:31:17 EDT 2004 | gregp
I think it depends on the thickness of the PORON sheet. For .3mm balls you could probably get away with a pretty thin sheet (maybe 1/16"). I don't know how thin it comes offhand. For the part you are describing I woulf try maybe a 3.5mm OD and a 1
Electronics Forum | Thu Jul 25 21:41:03 EDT 2002 | davef
1.0 X-OUT POLICY 1.1 Each Panel not to contain in excess of X% X'd-Out boards. 1.2 Each X-Out board to be marked in a manner so that Pick & Place equipment will not attempt to insert those boards X'd-Out such as fiducial reference hole for paneliz
Electronics Forum | Tue Oct 05 17:37:21 EDT 2004 | mikecollier
We currently use a KIC 2000 system to profile on our oven and create our recipes. I had a customer in today reviewing our profiles, and he had concerns that we were exceeding 4 deg. c/sec. on our profiles. The process window parameters that we use
Electronics Forum | Mon Jul 10 21:11:18 EDT 2000 | Dave F
Yall: Last week Mike and I got together to compare notes about our 4th of July celebrations. While similar with requisite barbecue, beer, fireworks, and Sousa; Mike won the day because of the ample selection of live music, headlined by War. Can yo
Electronics Forum | Fri May 11 07:37:22 EDT 2007 | davef
IPC-A-610D 3 Handling Electronic Assemblies 3-1 3.1 EOS/ESD Prevention 3-2 3.1.1 Electrical Overstress (EOS) 3-3 3.1.2 Electrostatic Discharge (ESD) 3-4 3.1.3 Warning Labels 3-5 3.1.4 Protective Materials 3-6 3.2 EOS/ESD Safe Workstation/EPA 3-7 3.3
Electronics Forum | Tue Feb 15 19:54:48 EST 2000 | Clarissa Ortner
I am supposed to heatsink a Temp sensor with leads .9-1.1mm(.035--43"). I have found on our engineering units that the smallest heat sink I have found commercially is still too heavy for the leads and unless the operators use exxxxtreme care the wei
Electronics Forum | Sat Jul 01 04:22:09 EDT 2000 | Sal
I have two questions 1. How do I control the skewing of FETs/power regulators ? ( the one's with the big rectangular pad and two smaller one's for the leads).If I go 1:1 with the apertures I seem to get solder balling and when I tryed to minimise th
