Electronics Forum | Sun Feb 04 15:06:20 EST 2007 | Scotty
Profile should have a longer cool soak. Verify as was mentioned all pin/fixture support through out the entire process. Print, Place, pre reflow hand load, post reflow, carriers, ICT, Depanel and FCT. Conformal Coated or Potted? Mylars work well for
Electronics Forum | Mon Apr 12 22:49:09 EDT 2004 | Ken
I will assume the balls of the device are tin-silver or tin-silver-copper??? There is no reason why you can not run 63-37 solder paste on this device. You will form an intermetallic at the interface structure, however, you will NOT form the 2/3 col
Electronics Forum | Tue May 20 09:34:28 EDT 2008 | roc2x
Well something is different isn't it? * Paste * > Part supplier * Board fabrication * Was the > profile that you reference the measured > temperature or the the settings keyed into the > oven? > > The cross sections seem to show less > than exp
Electronics Forum | Fri May 04 16:19:52 EDT 2018 | solderingpro
meaning its non-eutectic. You would want to stay as close to 350°C as possible or (if a slightly off version of SAC305) target the highest melting point of your chemistry) - assuming your temp controller is properly calibrated that is. Other option
Electronics Forum | Tue Jul 27 13:14:36 EDT 1999 | Bill Bannister
| | We are currently using a 65/35 solder for our wave process but are considering switching to a 63/37 for a substantial cost savings. No one here seems to know why we everused a 65/35 formulation in the first place. | | I understand 63/37 to be pre
Electronics Forum | Tue Apr 11 20:26:16 EDT 2000 | Dave F
Jeremy: Parts assembler make leads of either Alloy 42 (Invar, whatever) or copper. The solderability of these leads are protected with eutectic or non-eutectic tin/lead solder, palladium or some palladium alloy, or gold. Cuppla things to consider:
Electronics Forum | Tue Jul 27 10:37:47 EDT 1999 | John Thorup
| We are currently using a 65/35 solder for our wave process but are considering switching to a 63/37 for a substantial cost savings. No one here seems to know why we everused a 65/35 formulation in the first place. | I understand 63/37 to be pretty
Electronics Forum | Mon Feb 20 13:29:44 EST 2006 | patrickbruneel
Great work Amol, Please keep us posted about the results of the x sectioning. I personally don't believe that the cracks are due to non-eutectic properties of SAC. Because the alloy is only 4�C off eutectic and when a solder joint exits the solder
Electronics Forum | Tue Jul 27 14:09:51 EDT 1999 | JohnW
| | | We are currently using a 65/35 solder for our wave process but are considering switching to a 63/37 for a substantial cost savings. No one here seems to know why we everused a 65/35 formulation in the first place. | | | I understand 63/37 to be
Electronics Forum | Thu Jul 29 19:30:44 EDT 1999 | Boca
| | | We are currently using a 65/35 solder for our wave process but are considering switching to a 63/37 for a substantial cost savings. No one here seems to know why we everused a 65/35 formulation in the first place. | | | I understand 63/37 to be
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