Electronics Forum | Thu Aug 12 00:17:15 EDT 1999 | DLKearns
Wanted to know if there was a good "to go by" tip other than the customers(if it helps current req.,10% of 30% of trace) requirements, about pits in the traces on copper plated ceramic substrates? More to the point how many is too many regardless of
Electronics Forum | Tue Dec 21 16:47:15 EST 1999 | GERARDIN
Hello Pascal As mentioned by Wolfgang the key issue is the printing process capability. For a thick copper level 90�m we noticed that the pad reduction can be greater than 20% depending on supplier sources. Typicaly for a cad Width = 0.4 we can
Electronics Forum | Mon Dec 20 12:50:27 EST 1999 | Wolfgang Busko
Hi Pascal, 0,65mm pitch normally isn�t much of a problem. With 90�m CU I don�t have any experience but would like to know what deviation from nominal value for the pads you get with different PCB-deliveries. In short, for the standard Cu=35�m we se
Electronics Forum | Thu Aug 22 04:56:34 EDT 2019 | hathawayc
Hi,I am a newone here.I wonder if the copper strip can be tin welded on PCB board?How should it be welded?Are there any requirements?Are there any defects?
Electronics Forum | Tue Dec 14 22:17:33 EST 1999 | Dave F
Armin: How ya doin� bud? CK gives good advice, but I'd like to take a bit of a different angle. Q1. For 0.7 mm (0.027in) diameter hole for vias, what�s the minimum annular ring for this hole diameter? Depends on what you�re trying to do. For in
Electronics Forum | Wed Apr 23 08:35:54 EDT 2003 | davef
Over time, copper in the via will form an oxide with oxygen in the air.
Electronics Forum | Mon Oct 27 14:28:19 EDT 2008 | patrickbruneel
Do you refer to the highlight in the picture as a solderball? Looks more like copper to me.
Electronics Forum | Tue Nov 04 12:58:17 EST 2008 | smt123
I have to agree with Patrick here. This image appears to show a board that is NOT HASL as there is what appears to be a copper pad in the upper portion of the image. But then again the arrow tip appears to be white and I woudl expect that to be red s
Electronics Forum | Mon Jun 14 16:49:08 EDT 2004 | Dreamsniper
Can I manually tin them with solder specially the BGA's. Will that improve the solderability? What about corrosion of the copper? will it be prevented with the above process considering that after tinning of solder the solderability became acceptable
COT specializes in high quality SMT nozzles and consumables for pick and place machines. We provide special engineering design service of custom nozzles for those unique and odd components.
2481 Hilton Drive
Gainesville, GA USA
Phone: (770) 538-0411
winsouce.jpg)
.png)
