Electronics Forum | Wed Aug 02 02:31:11 EDT 2006 | CHIPshooter
I have seen 0402 inductors that look identical to 0402 caps, come in embossed reels, but the pitch on the tape was 4mm. Im not saying they dont exist, but i have never seen an 0402 component come in an embossed tape with a pitch of 2mm. everything i
Electronics Forum | Mon Jul 31 14:42:58 EDT 2006 | Chunks
Hi Steve, Yeah outta my control, till NPI tosses it over the wall. Yes, everything was kept the same but we did go to a new stencil house. I'll try an ego busting move and ask if we can order a stencil from were we normally do if/when we respin
Electronics Forum | Mon Jul 31 14:46:08 EDT 2006 | Chunks
Hi Russ, Wow, just Chempolished ah? These stencils are electropolished, so I would think they would release pretty easy. Ours are 6 mils, ut I don't think that would make a big deal though. I'm talking a nite and day diff between jobs. I guess a
Electronics Forum | Tue Aug 01 10:09:52 EDT 2006 | cyber_wolf
Chunks, Make sure your aspect ratio is OK. Normally for an application like this, I would use a .005 foil. The foil material would be invar.The invar has better release characteristics. Crappy solder paste can also cause release issues. I am not sur
Electronics Forum | Tue Aug 01 10:29:43 EDT 2006 | slthomas
It's been a while since I've built with 16 mil pitch, but I have to second the recommendation to go to 5 mil stencils. Night and day as far as release characteristics. The increase in aspect ratio opens up the window a lot. (read = covers up a mult
Electronics Forum | Tue Aug 01 12:38:13 EDT 2006 | razor9114
I would go with a 5 mil stencil as well, we experienced some similar issues with micro BGA's and the area ratio was suspect as well as the MESH size of the paste. We went to Type IV paste and verified our area ratio and everything ran beautifully. Pa
Electronics Forum | Tue Aug 01 13:47:46 EDT 2006 | russ
i'm not Dave F by any means but here is the deal with seperation speed. Totally dependent upon paste formula. I have two formulas of paste here (WS lead,NC lead and pbfee) and one we seperate as fast as machine wil allow (WS), while the other (NC)
Electronics Forum | Tue Aug 01 18:39:24 EDT 2006 | G.P.
I'm in 100% agreement with the 5 mils foil. In applications where there is less than 20 mil pitch actives and less than 0603 discretes 5 mils does great and increases your operating window by a ton it's less sensitive to release and print accuraccy.
Electronics Forum | Wed Aug 02 15:35:46 EDT 2006 | solderiron
Be careful and review the MSDS sheets on any dross inhibitor reducer etc. Most are extremely hazardous. We offer a product that is not hazardous it melts at pot temp. forms an oily substrate, removes the good solder from the dross. Also can be used a
Electronics Forum | Tue Aug 08 09:52:13 EDT 2006 | aj
I would be interested to see what Dross eliminators are available also. I am currently trialing a very user friendly Solder Saver Handtool- it basically churns the Dross Solder until the dross is left in Powder form. We then scoop out the powder. e
