Electronics Forum | Thu Dec 09 10:40:45 EST 2010 | grahamcooper22
MSL 3 means you can have the devices open for a maximum of 168 hours in an atmosphere of less then or equal to 30 C and 60% RH. If the humidity is less then 60% then it means the devices will absorb less moisture in a given time, but even at 40% RH y
Electronics Forum | Thu Jun 28 09:38:14 EDT 2012 | 14367
PSMN130-200D MOSFET TRANSISTOR D2PAK - failure of some parts led to investigation, oxidization or surface contamination was noticed on remaining parts. The surface contamination could be removed when fingernail was drawn over the bottom terminating s
Electronics Forum | Thu Jun 28 09:38:20 EDT 2012 | 14367
PSMN130-200D MOSFET TRANSISTOR D2PAK - failure of some parts led to investigation, oxidization or surface contamination was noticed on remaining parts. The surface contamination could be removed when fingernail was drawn over the bottom terminating s
Electronics Forum | Fri Oct 10 20:56:50 EDT 2014 | jlawson
Main issues... Pad Design Thermal Mismatch Design related to pads effected Moisture and out gassing in substrate / part terminations can move parts slightly during preheat prior to liquidous this get position shift ( smaller the parts more an issue)
Electronics Forum | Wed Aug 22 16:41:09 EDT 2018 | emeto
To all good suggestions I will add a few other thoughts: 1. Check PCB design(attached). THis mask clearance there is designed so you have some gas escape plan- verify if your PCB design follows that. 2. You can have a long soak reflow profile to re
Electronics Forum | Fri Jan 04 11:28:30 EST 2019 | bane016
we never used a paste of this type...not everything in the paste type and profile..Everything has an impact on soldering quality and sensitivity of materials quality and type of pcb...atmosphere and nitrogen in oven...Try step by step to solve the pr
Electronics Forum | Fri Mar 29 20:07:50 EDT 2019 | sarason
I measured the temperature rise when I built the unit and it has a nice linear rise in temperature over the 3 minutes. I have used the Quikees before. The galcon gas stinks and must be evacuated. The galcon is expensive. The galcon is a perflourocar
Electronics Forum | Thu Oct 17 00:34:59 EDT 2019 | jani
Hi, We have solder reflow use with water soluble flux and Tin/lead process. There is special glass component which needs to mask during reflow soldering and wash flux+solder mask post soldering. The existing solder mask does washes off. But leaves
Electronics Forum | Wed Aug 12 18:26:16 EDT 2020 | SMTA-64387117
Looking for engineers to test new desiccant technology and compare with Silica Beads. Samples provided. Additionally, engineer can work with and collaborate with "engineers only" group lead by US Military engineer for packaging. The goal is to d
Electronics Forum | Thu Aug 05 12:16:15 EDT 2021 | cyber_wolf
Exposure Controls: 8.9 HF Engineering Controls: Use only with production equipment (such as stencil printers and re-flow furnaces) with adequate exhaust ventilation and other safety features specifically designed for use with solder paste. Contro
winsouce.jpg)