Electronics Forum | Mon Mar 06 16:42:25 EST 2000 | Jon Wentz
Hi PR, FYI,some adhesives harden within the stencil apertures with IPA if not cleaned well. We used Heraeus PD955PY and had to closely inspect our cleaning process of the stencil. Just another tip, ask your adhesive vendor for their recommendation o
Electronics Forum | Tue Oct 03 09:13:42 EDT 2000 | jarnopy
Hi This is what i think: 1. Screen printing is fast and dispenser is quite slow 2. Quality is poor on screen printing. Quality is very good on dispenser (dispenser must have screw+pressure function). 3. Screenprinter (automatic) and dispenser (auto
Electronics Forum | Tue Oct 03 13:14:37 EDT 2000 | jarnopy
Hi, You are right, but if you don't have very fast ship shooter then i think that dispenser is better. I have experience on both variation. If you have a line dispenser then speed is quite good. Most often it is sufficient. And unfortunate often qual
Electronics Forum | Tue Jul 11 10:28:02 EDT 2000 | John Thorup
Dave, George I think we're missing something here, or at least I am. While the plastic in question could possibly be dissipative or non generating, I'm wondering how thick such a stencil would be to clear even the lowest profile PTH component? Can w
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 | Thu Jul 06 02:08:27 EDT 2000 | Ralph Landry
I need to build a couple of prototype SMT boards and need some recomendations on some adhesive or epoxy to use to hold the parts down prior to hot air soldering. I find that some parts want to skip across the board when heated, or they want to walk
Electronics Forum | Mon Mar 06 16:42:25 EST 2000 | Jon Wentz
Hi PR, FYI,some adhesives harden within the stencil apertures with IPA if not cleaned well. We used Heraeus PD955PY and had to closely inspect our cleaning process of the stencil. Just another tip, ask your adhesive vendor for their recommendation o
Electronics Forum | Thu Feb 15 04:22:22 EST 2001 | msaad
This message has nothing to do with BGA short, but I spent 30 min trying to find out how to post a new message but I couldn't find it!!! My question is: Does any one know what is "No residue low tack adhesive film used for registration" is used fo
Electronics Forum | Wed Feb 21 14:18:37 EST 2001 | jagman
Could anyone please give me some insight on the time/temperature requirements for curing SMT adhesive used for a high temperature (96/4 solder) application in a bake oven, rather than using reflow? I understand that it would probably vary from epoxy
Electronics Forum | Wed Mar 14 08:43:39 EST 2001 | genglish
Dave is absolutely right, your adhesive supplier must give you a data sheet with a precise cure profile on it. We use a cure profile like a trapezium shape with a max temp of 150�C for a period of 120 seconds but this is totally dependant upon the a
