Electronics Forum: /09 (Page 606 of 1632)

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 12:39:58 EDT 2008 | patrickbruneel

Am glad we got that straight There is a big difference between the �real world� and the �ideal world�.

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 12:43:13 EDT 2008 | patrickbruneel

Dave, I don't think you will get a response in the mean time he found the right knobs to fix the problem. Sorry couldn't resist

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 15:31:11 EDT 2008 | gregoryyork

Should have sent them in for Xray/microsection Steve that sorts out the QA guys over here

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 15:54:57 EDT 2008 | slthomas

"When we solving a problem we have to be absolutely sure it's really solved." Conversely, it's always good to return things back to the way they were when you conclude that THAT knob turn didn't solve the problem.

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

Clean vs No-Clean

Electronics Forum | Mon Sep 08 05:23:11 EDT 2008 | milas

Hi We are designing a new pcb which contains sensitive analogue circuitry, where tiny leakage currents could dramatically affect product performance. Should I build this product Clean or a No-clean chemistry set ? Thanks in advance

SMT LEDS SOLDERING

Electronics Forum | Thu Sep 11 13:51:57 EDT 2008 | stepheniii

How are they being stored and handled? It might be an MSD issue. I think IR reflow would be a worst case scenario.


/09 searches for Companies, Equipment, Machines, Suppliers & Information

PCB Handling Machine with CE

Software for SMT placement & AOI - Free Download.
Blackfox IPC Training & Certification

Software programs for SMT placement and AOI Inspection machines from CAD or Gerber.
Equipment Auction - Eagle Comtronics: Low-Use Electronic Assembly & Machining Facility 2019 Europlacer iineo + Placement Machine  Test & Inspection: Agilent | Tektronix | Mantis Machine Shop: Haas VF3 | Haas SL-20 | Mult. Lathes

World's Best Reflow Oven Customizable for Unique Applications
Sell Your Used SMT & Test Equipment

High Precision Fluid Dispensers