Electronics Forum | Thu Jul 07 00:53:12 EDT 2005 | Gary Bremer
Curtiss-Wright uses MIL-I-46058 at present. Any suggestions on how to approach engineering and update the drawings for new contracts?
Electronics Forum | Thu Jul 07 06:48:15 EDT 2005 | davef
Alternatives are: * DSCC Columbus continues to maintain the QPL for MIL-I-46058C. [Engineering is unlikely to change.] * Use International Electrotechnical Commission Standard, IEC 61086 - Coatings for loaded printed wire boards (conformal coatings)
Electronics Forum | Thu Jul 07 07:18:50 EDT 2005 | davef
Sounds like you need to turn-up the dial of your oven. Solderabilty protection finishes on components are changing, whether it makes sense or not.
Electronics Forum | Thu Jul 07 17:08:28 EDT 2005 | Inds
how fast are you ramping your profile..and how long are you soaking it.. are you giving enough time for the flux to get activated...
Electronics Forum | Thu Jul 07 18:03:27 EDT 2005 | russ
Sarag, FYI tombstoning is a functional failure. Tombstoning is where one end of the component is not soldered and is in the air above the board/solderjoint surface. You may be thinking of billboarding (part on its side with both ends soldered down)
Electronics Forum | Thu Jul 14 09:26:30 EDT 2005 | saragorcos
Hello Lloyd, I have posted your picture in my photo library for all to see - you can find the page at http://www.residues.com/circuitree_pictures.html Hopefully that helps! Sara
Electronics Forum | Thu Jul 14 16:15:04 EDT 2005 | russ
Can flux really prevent wetting? This seems odd to me. I am actually thinking the opposite of Bman, I am wondering if using a homeplate with an overprint condition might help? Russ
Electronics Forum | Mon Jul 25 18:54:10 EDT 2005 | Brian
Exactly. We bring the paste apertures closer together, so that the part sits more in the center of the paste. As a CM, our customers do not always accept our recommended design changes, so we use this method to reduce our tombstoning if the pad geo
Electronics Forum | Thu Jul 07 05:12:08 EDT 2005 | bbudianu
Hi. I'm new in bussines. I have a DEK screen printer and I have to choise solder paste and flux. It has to be lead-free. What do you recomand? Of course it has to be cheap and good. :)
Electronics Forum | Thu Jul 07 07:49:42 EDT 2005 | mmjm_1099
AMTECH NWS-4200-4H3 is the best I have come across for a leaded process. As for lead-free I did some studies and we liked the Indium 3.1 and 5.1.
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