Electronics Forum | Thu May 10 21:45:41 EDT 2007 | davef
Comments are: * Mass lead trimming equipment suppliers are: ** Q Corp; 301 River St, Derby, KS 67037; 800-835-1099 316-788-3746 F316-788-7428 qcorporation.com qcorp@qcorporation.com ** Microscan [LT1821 Lead Trimmer]; ?? ** Roto-Form; PO Box 118; Si
Electronics Forum | Mon Jun 18 14:46:24 EDT 2007 | ck_the_flip
I have heard that with lead free soldering, the cooldown phase is NOT as critical as it is for Tin-Lead. -2�C per second cooldown is good enough to form a good solder joint with good grain structure.
Electronics Forum | Tue Jul 24 07:57:55 EDT 2007 | davef
It sounds like the QFN component is not solderable. * Use ANSI/J-STD-002, Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires * Contact your QFN component supplier for help * Consider a more active flux, since you might
Electronics Forum | Wed Aug 01 09:10:28 EDT 2007 | patrickbruneel
Fastek, I just take every opportunity to point out the nonsense of lead-free. In today�s assembly environment the exempt military and hi-rel products are manufactured cheaper than lead-free consumer products. Now does this make any sense to you?
Electronics Forum | Tue Aug 14 20:28:38 EDT 2007 | davef
Just talking off the top of my head, I'd guess that greater weights can be tolerated on the bottom side of two sided reflow when using lead free solder than leaded solder.
Electronics Forum | Tue Feb 19 22:57:38 EST 2008 | davef
Duno. What's the diameter of: * Finished connector lead * Finished through hole We reckon: Lead size plus ~0.25mm [0.010"] is normal.
Electronics Forum | Wed Aug 22 02:01:03 EDT 2007 | lococost
Have you tried the same setup with your leaded paste? Your lf paste might have different cold slump characteristics.
Electronics Forum | Mon Sep 10 15:49:28 EDT 2007 | mun4o
Hi, the solder on the pad is not molt.Temperature of the leads is about 220*C( I change this T from 214 to 232) but result is same - solder is granular and not diffuse.I think the T on leads is not enough high,bu I can't increase because the max T on
Electronics Forum | Thu Oct 18 11:18:46 EDT 2007 | rmitchell
Hi, Anyone have the DRS25 rework machine and use it for lead free BGA's? Anyone upgraded their DRS24 to a DRS25? We may pay to upgrade our 24 to a 25 to improve our Lead Free BGA rework process. Thanks, Rob
Electronics Forum | Thu Oct 25 14:18:16 EDT 2007 | jsloot
Is anyone able to help me out on a aperture design for a lead free castellated part? please contact me if you can.
