Electronics Forum | Fri Apr 06 08:28:34 EDT 2001 | CAL
From what you are saying................If I hear ya correctly - There is no "Protective" on the Pads (OSP, HASL....) You will be hard pressed soldering to bare copper. This can not be right. My suggestion- go polyamide with electroptical connectio
Electronics Forum | Wed May 22 08:20:59 EDT 2002 | xzinxzin
*yes, I used water soluble solder paste (OMG-WS-300), the flux type is ORM0. The component terminations are bare copper,and they�re supposed to be that way. The supplier of these parts is MAXIM, produced from Philipine, get from customer. * We can no
Electronics Forum | Wed Mar 31 13:05:46 EST 2004 | JoeH
Anyone used this package? It's Cygnal PN C8051F300. The part has bottom side, flat terminations (like a BGA without the balls). There is metalization on the sides of the package but it's not plated (bare copper). Metalization on the bottom is pla
Electronics Forum | Wed Nov 12 09:32:30 EST 2008 | markhoch
Are there better options? Dude, EVERYTHING else is a better option. Gluing aluminum foil down to the bare copper would be a better option. ENIG (Electroless Nickel Immersion Gold), Immersion Silver, Immersion Tin, and OSP all provide flatter surfac
Electronics Forum | Tue Sep 14 10:10:39 EDT 2010 | teamcanada
We are having an issue with a PCB supplier. Their Tin HASL layer seems to be the problem. We have triedworking with them to correct their process. What seems to have helped is lowering their temperature of the Tin dip from 540 F to 510 F.We still ha
Electronics Forum | Tue Jan 14 08:48:09 EST 2014 | davef
I don't know. What does your paste supplier say? You can run tests * That you used to qualify this paste in the first place. * According to IPC J-STD-005A Requirements for Soldering Pastes * Using your toughest stencil to print this paste on a bare c
Electronics Forum | Fri Oct 16 12:41:29 EDT 2015 | deanm
Do you have a solderable surface (walls)? It looks like most walls have a silver arc at the top but some do not (especially the last link) which I interpret that it has been plated (in most cases). Is it possible that the component does not have suff
Electronics Forum | Fri Jun 18 20:09:52 EDT 1999 | Dean
| Has there anyone bold enough to try this in their shops? My cubemate just got through telling me that at his last shop, they had bare copper boards (no HASL, no OSP, no nothing), with minimal solderability problems. | yes, 8 years ago I developed
Electronics Forum | Mon Sep 17 05:48:10 EDT 2012 | stivais
Hi Ben, Yes, this could be the reason but have you ever seen solderability issues for (new) boards with LF-HAL surface finish? I have seen this only if there are surface finish quality issues for bare boards (exposed copper etc.). In this case we di
Electronics Forum | Thu Apr 16 08:07:05 EDT 1998 | Stan
Currently I am in the buisness of soldering bare die to the top surface of a copper heat sink. Is any one else have some exprience in this process that can help. We heat a copper slug through a contolled atmosphere, place a preform then a bare die.
