Electronics Forum | Thu Oct 30 00:12:13 EST 2003 | Grant Petty
Hi, Another option we have used here in house is to remove the unwanted BGA balls with solder wick, and then to manually place them on the PCB foot print. This eliminates the pick and place machine's optical centering freaking out because the balls
Electronics Forum | Tue Jul 18 04:05:58 EDT 2006 | EC
Hi, For the past few weeks, we been seeing solder hole after reflow and this product been running for almost a year. We had try to shorter and longer the pre-heat time, reflow time and even reduce and increase the temperature....but could not help..
Electronics Forum | Fri Feb 13 03:26:07 EST 1998 | Brian S. Bentzen
Hi , The 4th stage in reflow soldering, the cool-down, I find is often over looked. A rapid cooling rate should give finer lead and tin structure with more bindings and thereby result in stronger solder joints. Can anybody give me some information
Electronics Forum | Tue Jul 18 21:48:15 EDT 2006 | davef
We assume by "solder hole" you mean void. We believe void formation is driven by the thermal recipe that you've chosen to use. Search the fine SMTnet Archives for further discussion. There is a tremendous amount of current industry discussion on v
Electronics Forum | Wed Jul 19 21:11:40 EDT 2006 | ec
Hi Dave, Sorry that I did not explain clear enough. What I mean normally after reflow, the solder joint is very smooth and there is wetting. But now we see there is hole on the solder surface and is not on the same loaction. This product have been r
Electronics Forum | Fri Feb 10 14:29:10 EST 2023 | klauss
It happened just after it came out of the reflow oven. And i guess the thing on the last photo is not blob of staff but the remaining part of termination of the cap. because when i try to iron soldering on it, i just cant. solders not sticking. on it
Electronics Forum | Tue Jul 18 07:39:52 EDT 2006 | Chunks
Is the hole always in the same solder joint? What parts do you see the hole(s) on? Can you try a different paste?
Electronics Forum | Tue Jul 18 13:52:42 EDT 2006 | SWAG
Could it be an unmasked via attached to the SMD pad under the part???
Electronics Forum | Mon Aug 08 20:25:39 EDT 2005 | plcc
Hi Davef, I'm suspecting that too! The recipe we are using is the optimum for good soldering results. I'm checking with our supplier on the type of pcb material. Do you know the recommended material for pcb undergoing reflow, under ROsH condition?
Electronics Forum | Mon Aug 08 21:34:44 EDT 2005 | davef
Jim Can you be more specific? What's going "yellow / beige" on you? * Laminate * Solder mask * Legend
