Electronics Forum | Mon Jan 10 19:13:46 EST 2000 | TNT
HELLO MIKE, THE PROBLEM WITH THE VIA BEING IN THE MIDDLE OF THE PAD CAN BE HANDLED. IF YOU ARE HAVING PROBLEMS WITH SOLDER FLOWING THROUGH AT REFLOW YOU MIGHT WANT TO CHECK YOUR VACUUM AT YOU SCREEN PRINTER. SOMETIMES THE VACUUM THAT HOLDS THE PCB
Electronics Forum | Fri Oct 29 05:23:00 EDT 1999 | Wolfgang Busko
Hi Bart, that�s much to high. If that would happen to me my boss would tear my head off. For improving the yields you must find the cause for the soldering problems. What are the symptoms? What could be the cause for the symptoms? Could be design pr
Electronics Forum | Tue Sep 21 08:43:28 EDT 1999 | Christopher Cross
We are finding solder shorts under 1206 Components on the bottom side of our boards.In all cases these shorts are from either side of the component to a feed-thru under the component body. Adhesive is used to glue down the component and then the boar
Electronics Forum | Wed Jun 24 09:23:35 EDT 1998 | Chris Kelly
What is your current solder pot temperature? Whatever that temperature is, has it been verified/calibrated? What kind of flux is being used? No-clean, OA, RMA? How is the flux being applied to the PCB? Is this problem occuring on ALL negative termi
Electronics Forum | Tue Nov 27 12:12:53 EST 2001 | Justin
We have noticed that when you are using a no-clean flux with the wave solder process that you will have additional solderballs. One thing that we have done is to change the PCB finish to a matte finish. This has greatly reduced the number of solder
Electronics Forum | Fri Apr 26 12:18:24 EDT 2002 | Yngwie
Today the line experienced the white gloves turns green at the point of contact when holding fresh board that came out from wave soldering. Was that the effect of inproper solder mask curing at PCB house during fabrications ? For a proper cured solde
Electronics Forum | Thu Jun 20 10:48:56 EDT 2002 | Hussman69
When you ask for data in terms of rework, do you want reflow solder yields versus wave solder yields? Or do you want repair data from each process, or yield data that shows actual glue defects from screen printing versus solder paste screen printing
Electronics Forum | Thu Feb 13 10:38:51 EST 2003 | davef
Given that you are bridging front to back, contast the situation with the thiefs used to prevent bridging when wave soldering SOIC. If this is reasonable, the thiefs should be located behind the trailing connector pins. You can prove-out this [and
Electronics Forum | Thu Aug 07 19:48:23 EDT 2003 | Shawn
We do allot of multi layer boards with heavy ground planes or heat sinks attached. We have a Trieber, use RMA flux, solder pot temp at 500F, foam fluxer, spray the top if need be, and would warm up the PWB to around 240F over the preheaters. We have
Electronics Forum | Wed Jun 22 14:14:42 EDT 2005 | Steve
Tin/Lead we have had no problem in masking off areas on a pcb during wave soldering. Lead Free alloys, Nickel Silver Copper would there be any compatability issues with a Peelable latex solder mask containing Ammonia. Really hot need to know.
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