Electronics Forum | Sun Oct 28 08:32:47 EDT 2007 | davef
With a 7 thou stencil, we'd go 1 to 1. So for a more typical 6 thou stencil, we'd bump the aperture area by 1.15, maybe 1.2. We make no distinctions between 'innies' and 'outies'. Are you talking about castellations on land grid devices [ie, BCC�, L
Electronics Forum | Thu Aug 27 18:22:37 EDT 2009 | zombie
Hello, thanks for the help. Since this is only for prototypes we can avoid lead-free. Also our boards are not that big or thick. On the other side, our parts are small, the smallest is 1.5x1mm. Would the DRS24 work? What brand is usally more affor
Electronics Forum | Sat Jan 30 21:55:52 EST 1999 | Kallol Chakraborty
Does anyone have any reliability data /concern on pressfit rework/repair - is there any qualified /characterized equipment /tools present in the industry? What kind of effect does it have on barrel plating quality (1.5mil avg.) after 1 time rework or
Electronics Forum | Thu Jun 18 14:46:38 EDT 1998 | Igmar Grewar
| WHAT SHOULD THE RATIO BE OF STENCIL APERATURE TO PAD TO GET GOOD QUALITY RESULTS. BY THAT I MEAN, A MINIMM OF SOLDER BALLS, AND LITTLE TO NO BRIDGING, SHORTS, ETC.. | RIGHT NOW WE ARE USING A 1:1 RATIO, BUT ARE INVESTIGATING REDUCING THE APERATU
Electronics Forum | Tue Oct 22 14:57:18 EDT 2002 | Jim M.
I use a water soluble flux to solder an LCD into gold plated through holes of a .031 circuit card. Problem is the current water soluble flux (850-33) is not made anymore (the drop in replacement has a different formuala and does not work). The main i
Electronics Forum | Tue Feb 21 21:17:41 EST 2006 | Cal Kolokoy
M, The paste height is what you establish it as. You're probably using a laser measurement system, and these depend on where your reference datum is. Some will measure from a silkscreen, a trace, or solder mask. These add height, not to mention H
Electronics Forum | Wed Jun 12 14:42:40 EDT 2013 | armandogomez
Hello guys ! I am here again with a problem, right now we have a problem with a new product, the problems are with voids with the PTH we put a receptacle with terminal blades that are 1.3mm width in a pth with a diameter of 1.5mm we use a pallet to
Electronics Forum | Mon Jul 22 14:01:31 EDT 2013 | jax
HMP can mean a lot of things, although it is normally used as the generic name for one of the following alloys: Pb93.5 Ag1.5 Sn5 (296°C-301°C) Pb95 Sn5 (308°C-312°C) Pb97.5 Ag1.5 Sn1 (309°C) If you are talking abou
Electronics Forum | Mon Feb 21 22:36:19 EST 2000 | Dave F
Cedric: I know you said "5KE36CA." Motorola, Fairchild, and some others make a zener transient suppressor 1.5KExxCA. The CA suffix makes it bidirectional. Actually, Motorola is no longer in the business. On Semiconductor (www.onsemi.com) sells t
Electronics Forum | Sat Aug 05 09:19:50 EDT 2000 | JAX
Felix, 1-5: A step stencil is simply a stencil with area's of different thickness( step down's ). They are used for multi-package boards( BGA, fine-pitch, ..... ). They keep you from deciding whether or not you want the fine-pitch or the BGA devices
