Electronics Forum | Tue Jul 06 19:38:01 EDT 1999 | John
Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. Q #2) When speaking of annular rings, I have always thought of them as minimums. Su
Electronics Forum | Mon Oct 09 06:16:31 EDT 2017 | jamesbarnhart
I think you needed an IPC Class 3 annular ring because for very dense designs, the smaller the annular ring the better, as less space is taken by the pad or via and more space can be dedicated to routing the traces in highly populated areas of the bo
Electronics Forum | Fri Jul 09 16:32:35 EDT 1999 | John
Thanks everyone. I appreciate the help. John | Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. | | Q #2) When speaking of annular
Electronics Forum | Thu Aug 14 18:33:38 EDT 2008 | smt_guy
Am I Correct to say that the Via's Annular Rings are broken or incomplete? If they are then that's an automatic Failed. regards
Electronics Forum | Fri Jun 06 13:03:01 EDT 2014 | asksmt
Hi All, i have footprint 2X5 RA HEADER 2MM spacing in design. I am using about 9 mils of annular ring on top side and about 12 mils of annular ring on bottom side. refer picture attached. we are having solder short issues during wave solder so was
Electronics Forum | Wed Sep 13 03:25:43 EDT 2017 | sbar5781
Any insight appreciated!
Electronics Forum | Tue Dec 14 01:05:09 EST 1999 | cklau
Hi All I have a 0.7 mm diameter hole for vias, what�s the minimum annular ring for this hole diameter? Ans: Fur inner layers Min = .006" hole-pad annular ring ; inner pad dia - hole dia/2 For outer layers Min = .005" hole-pad annular ring ; outer p
Electronics Forum | Wed Jul 07 00:28:59 EDT 1999 | Scott Cook
| Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. John, It depends......mainly on the via size. Tenting works on smaller vias. Tent
Electronics Forum | Wed Jul 07 10:25:13 EDT 1999 | John Thorup
| | Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. | | John, | It depends......mainly on the via size. Tenting works on smaller vi
Electronics Forum | Fri Sep 08 21:49:24 EDT 2017 | sbar5781
Hello, I have a few PCB boards i am trying to be manufactured that are miniaturized medical devices. Thus they require IPC Class 3 Specs. However as miniature devices they have limited space, including a 0.4mm pitch BGA socket, which currently has
