|Ask the Experts Index|
Jun 21, 2021
Question About J-STD-001
We have a requirement to conformal coat a PCB assembly that is processed using a no clean flux. ...
Jun 18, 2021
Recommended Fiducial Shape
Is there a recommended fiducial shape for HASL finish boards that will minimize solder pooling on the fiducial ...
Jun 17, 2021
LED Component Shift During Reflow
What can be the root cause of SMT LED Component Shift during reflow? See the photo. ...
Jun 16, 2021
Double sided SMT
Can you provide some process pointers on soldering 2 sided SMT? ...
Jun 15, 2021
Is lead contamination during cleaning of PB-free stencils possible?
We have a stencil cleaner used for cleaning both Pb-free and SnPb stencils and misprint boards. We use ...
Jun 14, 2021
BGA re-balling process
Can you recommend a process or semi-automatic machine for re-balling BGA's? Is there a process or system available ...
Jun 11, 2021
Using Solder Paste Beyond the Expiration Date
We assembled a batch of PCBs using a water soluble paste that was beyond the expiration date. After ...
Jun 10, 2021
Conformal Coating Recommendation
We are developing an outdoor LED module. This module will needconformal coating to prevent humidity issues and protect ...
Jun 9, 2021
Matte Black Solder Mask Defects
We're working with a PCB vendor to fabricate panels of 6-layer circuit boards with ENIG plating and matte ...
Jun 8, 2021
Oxidation of Solder Balls During Secondary Reflow
Can solder balls oxidize and create opens during a second reflow if the circuit board assemblies were properly ...
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