Full Site - : annular ring dissovle (Page 8 of 14)

What is the acceptable annular ring size per IPC for 2mm 2x5 header ??

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

IPC Class 3 Annular Ring and Fine Pitch BGA Challenges

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

Thanks

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

Would YOU except this PCB ???

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

IPC Class 3 Annular Ring and Fine Pitch BGA Challenges

Electronics Forum | Wed Sep 13 03:25:43 EDT 2017 | sbar5781

Any insight appreciated!

Re: Need advise on regarding Vias

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

IPC Class 3 Annular Ring and Fine Pitch BGA Challenges

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

kapton dots and liquid solder mask

Electronics Forum | Tue Aug 09 13:25:24 EDT 2005 | pr

From what I can gather, the annular rings are used for grounding when these boards are put in housings. A screw goes through the hole and is torqued down. If there is excess solder on the annular ring, the screw doesn't seat properly. The pallets cov

Would YOU except this PCB ???

Electronics Forum | Fri Aug 15 00:51:30 EDT 2008 | boardhouse

Hi Paul, My discloser, I sell for an offshore house, this is Crap.... Section 3.4.3 Annular Ring (External) of IPC-6012A, which also calls out Table 3-5, states that "Plated-through holes identified as vias can have up to 90 degrees breakout of t

Manual Stencil Alignment

Electronics Forum | Thu Jun 28 08:24:34 EDT 2001 | Steve Vargas

Herb: Try oversizing your stencil fiducial openings to maybe twice the size of the board fiducial. When aligning manually, look for uniformity in the annular ring which appears around the fiducial. Hope this helps.....


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