Electronics Forum: pitches (Page 76 of 290)

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 16:09:45 EDT 2008 | vladig

To me it speaks about teh quality of the engineers. I[ve seen both types, though Vlad

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 10:18:15 EDT 2008 | gregoryyork

Sorry all I know is that storing the paste Tip down the flux will run to the tip of the cartridge so will be runny initially then dry up as you use the cartridge. Unless the Rheopump mixes it before application

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 10:25:51 EDT 2008 | rarnold

Flux is less dense than metal so it 'floats' to the back NOT the tip when the tubes are stored tip down.

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 11:11:31 EDT 2008 | gregoryyork

Yes sorry you are right so you have answered your own question anyway. Dry to start runny at the end

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 12:38:45 EDT 2008 | vladig

I'm curious how many knobs have left to be turn? :-) Isn't time an issue in a production environment? Vlad

Fuji machine problems

Electronics Forum | Fri Sep 19 16:33:46 EDT 2008 | mac5

If you're having trouble with a specific board, double check your Pattern, Diameter, Color and Scan Area under the 'Mark Data' tab. You can also try setting the Pitch Tolerance to '0' in the machine configuration. Good Luck, Bill

Less solder with fine pitch qfp

Electronics Forum | Mon Sep 29 11:44:39 EDT 2008 | manishc

We r facing less soder problem with qfp,using 4 mil tencil and lead free paste,tried out different combinations of reflow profile,can anybody suggest?

Less solder with fine pitch qfp

Electronics Forum | Mon Sep 29 14:47:15 EDT 2008 | davef

Let's narrow this down. Questions are: * Are you putting the proper amount of solder in the board with your stencil print process? * If you are putting the proper amount of solder in the board, where is the solder going? Pick one and then fill-in th

Rework Stations

Electronics Forum | Wed Oct 01 11:22:43 EDT 2008 | martinouk

I have several QFP-100's that I need to rework. Obviously this is going to be tricky with the component having a pitch of 0.5mm. Could somebody offer some suggestions for a decent, yet cost effective, rework station?

Rework Stations

Electronics Forum | Fri Oct 03 17:27:05 EDT 2008 | davef

Steve, you're correct. Placing and dragging 20 pitch is tedious and easily leaves bridges behind the heels of leads that can be difficult see.


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