Electronics Forum | Wed Mar 11 17:51:22 EDT 2009 | GSx
Thank you so much Dave, by having different lots of PCB received (same Supllier) with suspected and good carbon ink deposit, I found useful to adopt a comparison test among the different lots by usingthe IPC-TM-650 2.4.1 Adhesion , Tape Testing (lik
Electronics Forum | Thu Feb 26 15:49:48 EST 2009 | GSx
Hi I am looking for informations/specs about graphite/carbon deposited on PWB as a "spring contcat" or land (? not sure how to say in English). - Are there any Standards (IPC?)who define correct thickness of graphite ? - Are there any Test Method
Electronics Forum | Tue Oct 13 18:03:40 EDT 1998 | Sanjay Bhatikar
Sirs, What are the issues involved when a stencil printer is used for printing solder paste and adhesive? UV-curing of adhesive appears to help reduce slump and spread by forming a tough skin on the adhesive blob deposited on the PCB. Is th
Electronics Forum | Wed Oct 14 13:52:59 EDT 1998 | Bill Schreiber
Dear Sanjay, An important issue involved when stencil printing adhesives vs. solder paste is: How do you clean the stencils after printing? Do you need two machines? Two chemistries? Two waste streams? What are the potential environmental impacts an
Electronics Forum | Tue Nov 22 17:08:03 EST 2011 | mikenagle
I am looking for process suggestions. We want to use a pin transfer system to deposit adhesive to hold bottom side SMD's in place. We will place SMD's and through hole power parts on the top side and then run through a wave solder machine. Are ther
Electronics Forum | Tue Jul 11 11:35:03 EDT 2000 | genglish
John, Dave. The adhesive deposition is on the second pass through the SMT area, the PTH components have previously been fitted during the axial / radial stages of manufacture. The stencil is 2mm thick with a 1.5 mm routing depth. the leads (cut & cl
Electronics Forum | Fri Mar 09 15:10:08 EST 2007 | oldsmtdude
Simple question... Not so simple answer. It depends largely on process spec and honesty of the people running the test. Most will jump to throw out the flyers as "special cause". So if you didn't set the spec and didn't witness the run and measu
Electronics Forum | Thu Dec 17 03:55:41 EST 2009 | tod1967
Inspect your dispensed or printed adhesive deposits 100%, make sure your Pnp gives 100% 1st time placement and your cure is adequate. Conveyor or manual brd transfer can also be an issue. usually is in the process. Hopefully your following Loctite
Electronics Forum | Fri Aug 10 13:15:35 EDT 2001 | jhingtgen
John, Instead of dispensing the adhesive, why not screen print the adhesive on the PCB? The deposition is very repeatable and accurate.
Electronics Forum | Fri Apr 02 05:06:49 EDT 2010 | atchoum
Hi, I'm looking for an adhesive which can be stencil printed, in order to assembled PET (top layer) with Glass (bottom layer) for resistive touch panel application. The adhesive should be deposited at the border of bottom &/or top layer. Do you know
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