Electronics Forum | Tue Apr 01 19:45:07 EDT 2008 | boardhouse
Dave, Sorry for the slow response, have been out of town, The spacing I was referring to was from board edge to copper features. This spacing is required to keep the router and score blades from exposing or hitting the Copper. Regarding the slot I
Electronics Forum | Wed Jul 06 08:41:06 EDT 2005 | james
What I have seen too is that these parts normally come in a tube and from moving in the tube some of the copper starts to expose and solder will not adhere to these parts. Let me know if anyone else sees the same problem.
Electronics Forum | Tue Jan 24 11:59:55 EST 2006 | Chunks
Tell your board house/customers you want "non-smobc". hich stands for non-solder maske over bare copper. MPMs love exposed fids in just about any finish. You can always use pads on an MPM too.
Electronics Forum | Mon May 14 14:51:36 EDT 2001 | Brian W.
Personally, I prefer the OSP. I get a flat surface to deposit paste on, resulting in more consistent solder paste volumes. With HASL, the amount of plating and the mounding affect the paste deposition. I have even had it affect the placement. The
Electronics Forum | Sat Aug 22 12:18:12 EDT 1998 | Tryin'
| Board shops and us, the user, have a lot on our hands. As far as getting traces - this is done using an etch resist before solder mask and the HASL processes are performed. So when in the process is HASL performed?? | With tin/lead plated boards,
Electronics Forum | Sat Jul 03 00:58:57 EDT 2004 | KEN
so what did we do before X-ray? sound process shouldn't need to rely on inspection. Extended soaks can be used to burn off high temp volatiles but I have never heard of 5 minutes! I have used 90-120 sec. to reduce solder splatter....but haven't do
Electronics Forum | Mon Feb 05 07:02:11 EST 2007 | CL
ASIR, Findings for us so far: OSP- has worked well for us for single sided boards only. We have seen problems with using it on double sided reflow applications. Also, some customers have specified OSP, but are intolerant of exposed copper. Limited
Electronics Forum | Thu May 31 12:21:14 EDT 2007 | patrickbruneel
Let me give you some good advice You take already plenty of risk going lead-free, DO NOT use halogen containing fluxes in a lead-free no-clean process. Halogens left on the board will convert tin, silver and exposed copper into metal salts over tim
Electronics Forum | Mon Jan 11 14:48:44 EST 2010 | davef
SR1000 is commonly used for tenting. Search the fine SMTnet Archives on : tenting Someone gave us this note. We have lost their name. It seems to be good advice. If Liquid Photo Image (LPI) solder mask is required, do not tent via holes. Tenting
Electronics Forum | Tue Mar 27 04:39:27 EDT 2012 | andrzej
Have you got some experience with using laser (CO2 or fiber one) to label with barcode your PCBs ? So far I thought it is easy process but now we do tests with many PCBs covered with diffrent soldermasks and fiber laser as well as CO2 has same probl
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