Electronics Forum | Sun Dec 11 22:55:22 EST 2016 | ppcbs
What type of flux is in your solder paste? Active or No-Clean? With lead free solder you really should be using an active flux. The lead free oxidizes during reflow if you are not using a Nitrogen or Vapor Phase reflow. So a more robust and activ
Electronics Forum | Tue Nov 08 12:05:57 EST 2016 | aemery
Lachrymal, Where are you getting that from. Let me keep this simple because there can be so many variables in modern printing, some you can control and some you can't. Unless you are designing your own PCB's where you can decide how to orient the co
Electronics Forum | Wed Nov 23 19:50:23 EST 2016 | gmscribe
Hi guys, I'm working on a design involving a 223-pin BGA with 0.5mm pitch (ball size 0.3mm) with a 16-bit DDR3 controller involved. Currently routing a track between two balls is resulting in a track width of 0.1mm and a spacing of 0.077mm. Now the
Electronics Forum | Thu May 23 15:29:57 EDT 2019 | toms
Sorry for switching accounts, the SMTA interface was not giving me the option to add attachments. Evtimor - IC testing of some samples of different assemble holes and components leads did not yield anything abnormal. SEM EDX of the unsoldered lea
Electronics Forum | Mon Aug 19 13:32:54 EDT 2019 | aqueous
ROSE testing a post-reflow assembly which has been reflowed using no-clean flux may not yield information that is helpful. No-clean flux technology works by encapsulating the flux's activators and other chemical constitutes that would be harmful if l
Electronics Forum | Thu Mar 05 03:01:06 EST 2020 | leo_dektec
Hello toki, The only factor you need to consider is the production yield. If the volume is really high, need two smt line to run continually to meet the production, then u have no choice. If the volume is not that much, then u can consider below smt
Electronics Forum | Thu Nov 04 14:45:29 EDT 2021 | davem
With the costs of bar solder going through the roof manufacturers need to try to offset the dross related losses any way possible. Companies employ reclamation processes but in practice this only yields roughly 1/3 of the original cost of the solder
Electronics Forum | Mon Dec 06 14:44:41 EST 2021 | dwl
1 to 1 stencil aperture to pad should be fine on the gull leads, and yield 100% coverage with leaded solder. The thermal pad is going to be a challenge though, if you truly need 100% coverage. There will be out gassing from the flux and this will nee
Electronics Forum | Thu Feb 02 10:10:20 EST 2023 | tommy_magyar
Perhaps google this, as you will find very interesting articles. For scientific explanation look up solder fatigue on Wikipedia with references added. A more in depth explanation you can find on the Digikey forum where you will find other people like
Electronics Forum | Wed Apr 11 16:02:21 EDT 2001 | stevearneson
Let me put my two cents into this argument..After being part of many extensive studies conducted to determine the benefits of solder paste inspection, there has never been a case where the customer concluded that paste inspection (Height or Volume)wa
