Electronics Forum: aperture (Page 1 of 146)

castellated lead aperture design

Electronics Forum | Thu Oct 25 14:16:43 EDT 2007 | jsloot

Is anyone able to help me out on a typical aperture design for a castellated lead.

Home plate aperture holes

Electronics Forum | Fri Jul 13 14:56:01 EDT 2001 | stevenamacdonald

One of our board vendors recently switched their stencil design to home plate apertures. Since the change the quality and yield of their PCB's has went south, Could this process change be the cause?

0402 aperture design lf

Electronics Forum | Thu Apr 12 09:13:41 EDT 2007 | aj

Hi all, What stencil aperture designs do you use for 0402 components? Thanks in advance for replies. aj...

castellated lead aperture design

Electronics Forum | Thu Oct 25 14:18:16 EDT 2007 | jsloot

Is anyone able to help me out on a aperture design for a lead free castellated part? please contact me if you can.

Home plate aperture holes

Electronics Forum | Fri Jul 13 19:08:55 EDT 2001 | mparker

Home plate apertures are designed to reduce or eliminate solder balls that occur when placing a chip and reflow of the solder. This aperture type is usually desired when processing with a "no-clean" solder paste. The design of the aperture is usually

0402 aperture design lf

Electronics Forum | Wed Apr 18 09:31:24 EDT 2007 | aj

Hi, Can you advise the footprint dimensions used on the PCB ? Thanks, aj...

0402 aperture design lf

Electronics Forum | Tue Apr 24 02:56:12 EDT 2007 | chrispy1963

If the PCB you are using is a HASL pad finish and is a leaded assembly, we use homeplate pads with a 5 mil stencil. If the circuit has Enig finish and is PB-Free then we use 1:1 apertures with a 5 mil stencil Either method should provide no solde

castellated lead aperture design

Electronics Forum | Sun Oct 28 08:32:47 EDT 2007 | davef

With a 7 thou stencil, we'd go 1 to 1. So for a more typical 6 thou stencil, we'd bump the aperture area by 1.15, maybe 1.2. We make no distinctions between 'innies' and 'outies'. Are you talking about castellations on land grid devices [ie, BCC�, L

0402 aperture design lf

Electronics Forum | Thu Apr 12 09:50:51 EDT 2007 | pjc

There have been many designs of apertures for 0402, round, home plate, inverted home plate and various reduction amounts for square or rectangular apertures. What works best for a given application depends on PCB design, solder land finish, stencil t

Stencil aperture positional accuracy

Electronics Forum | Thu Jun 14 13:12:53 EDT 2012 | scottp

I haven't been in a bad enough situation to try it yet, but I had a conversation with Alpha Metals when we started doing 0.4 mm pitch and they mentioned that if we got into a situation like yours we could send them a board and they'd modify the artwo

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