Electronics Forum | Tue Feb 10 14:02:03 EST 2004 | Maryann
At times the orange peel effect can be from excess flux improperly removed. Our company strictly provides the service of selctive conformal coating application. We quite often see this. Most times if the board is simply "water washed", or IPA washed,
Electronics Forum | Tue Jan 27 10:54:45 EST 2004 | patrickbruneel
I would suggest trying an acrylic peelable mask. In most cases peelable temporary masks are latex materials. Since you use an acrylic conformal coating it makes sense to use a mask with the same make up to avoid incompatabilities. Link to acrylic mas
Electronics Forum | Mon Jan 26 11:10:56 EST 2004 | samaniegocesar
Hello to all of you, I'm running some small pcb's about 2.5x3.5 inches, can somebody tell me the zone temps and speed in meters/min that I have to use to get the best solder paste shine and best quality, is an oven of 8 zones. I apreciate your suppor
Electronics Forum | Tue Jan 27 10:21:07 EST 2004 | ldavis
Has anyone recently compared Assembleon/Samsung/Mydata/Universal equipment for very high mix - low volume applications? We are currently evaluating these vendors and would like to hear from others who have had to make the same kind of decision. Any
Electronics Forum | Wed Jan 28 10:14:03 EST 2004 | danielinsa
All � I am trying to change my rating method for end item assemblies provided by my CM. I am currently using a simple yield method based on total PCBA�s received vs PCBA�s rejected. I have considered PPM but am leery due to the high mix rate and fluc
Electronics Forum | Sun Feb 01 15:07:10 EST 2004 | rick
Pete C Thank you for answer. Yes we have to remove solder flux so we need chemistry for no-clean flux residue. What kind of damage can i expact from ultrasonics device? you said damage IC and clock types?. We have all components in solid encapsulat
Electronics Forum | Tue Feb 10 14:45:06 EST 2004 | patthemack
I have an old De Haart printer that has a problem. It will not reset either the z axis or the squeegee. The z axis just gyrates, and I think it's trying to get to the zero position, which is all the way down, but it's already down. Is there a De Haar
Electronics Forum | Thu Feb 12 10:19:46 EST 2004 | Bryan
Hi all, These days our customer asks us to figure out ,during reflow,the BGA ball and solder paste,which will first melt? I think it's very hard to get the rusult.coz I think it'll vary at diffrent part of the BGA,and how can this affect the perf
Electronics Forum | Fri Feb 13 11:46:23 EST 2004 | Jack
Is your customer trying to reduce voiding? If the device is using Sn90 / Pb10 and the paste is Sn63/Pb37 the board will melt first. However, if both solders are 183C eutectic, it's a tossup? PCB design, copper weight, bga type (pbga, micro bga, Tbg
Electronics Forum | Fri Feb 13 17:55:49 EST 2004 | Dale Freeman
I populate several thin panels (0.032")using a Samsung S-2000 P-N-P machine. With panel sizes of 8" by 10", it is very difficult to clamp the panels into the machine with deflection and bowing. Also, the Samsung makes it very difficult to adjust the
