Electronics Forum | Tue Jan 13 20:52:21 EST 2004 | davef
Bismuth Solder alloys * Fatigue life is reduced when soldered to hot air solder leveled (HASL) boards. * Lead from Hot Air Leveling (HAL) coatings can diffuse through the grain boundaries of alloy. * Lead is bismuth alloys can form a eutectic composi
Electronics Forum | Mon Dec 12 21:38:05 EST 2005 | davef
Effect of lead on bismuth solders * Lead from hot air leveling (HAL) coatings can diffuse through the grain boundaries of the alloy. * Lead can form a eutectic composition of Bi52Pb32Sn16 in the grain boundaries. * Melting point of this eutectic all
Electronics Forum | Mon Oct 08 18:21:27 EDT 2007 | mariss
We have recently acquired a Passaat SMRO-0406 oven. The manual is uninformative for oven settings. Can someone supply us with starting points for conveyor speed, Zone 1 to 4 and 5 to 8 temperature settings please? Our boards for a product we manufac
Electronics Forum | Fri Mar 10 08:42:40 EST 2000 | John
We're quoting out a new board design, and one of the prospective suppliers is pitching a silver coating process over hot air leveling. We haven't had experience with boards of this type, and I am concerned about any processing issues that may come u
Electronics Forum | Fri Mar 17 07:51:49 EST 2000 | Peter Barton
John, I have had previous experience of immersion silver coated PCB's in place of HASL coated type using no-clean processing with little or no problem at all. All of the process parameters were left unchanged. There is a very minor difference in th
Electronics Forum | Tue Nov 14 05:02:39 EST 2000 | Wolfgang Busko
Hi George, you got to find the common factor for the parts that are misaligned. This double sided tape method is IMO a good one for the first shot but you have some waste in parts that should be considered. (Better skip those precious parts for the
Electronics Forum | Fri Mar 10 08:42:40 EST 2000 | John
We're quoting out a new board design, and one of the prospective suppliers is pitching a silver coating process over hot air leveling. We haven't had experience with boards of this type, and I am concerned about any processing issues that may come u
Electronics Forum | Fri Mar 17 07:51:49 EST 2000 | Peter Barton
John, I have had previous experience of immersion silver coated PCB's in place of HASL coated type using no-clean processing with little or no problem at all. All of the process parameters were left unchanged. There is a very minor difference in th
Electronics Forum | Wed Nov 03 04:02:51 EST 1999 | Wolfgang Busko
Hi Wes, it may not be the same but I had a problem with one Phillips machine which started unpredictible mismounting all components about 1mm. When it occured you couldn�t get it do it right again unless you turned it down and restarted it. The servi
Electronics Forum | Thu Oct 01 11:40:17 EDT 1998 | Justin Medernach
Are there anyone who can give me the answer about solder ball problem? | We have 12 layer PCB and double sided PCB. After one side reflow soldering We found lots of solder ball under the PCB. The solder ball was coming out from via hole. | So
