Electronics Forum | Thu Oct 30 22:29:58 EDT 2008 | davef
For most applications, a nice square [or rectangle] pad works just fine. Assemblers ship boat loads of boards with these every day. It's reasonable for tight decoupling capacitor requirement applications to use round or radiused pads for components
Electronics Forum | Mon Dec 18 21:17:41 EST 2006 | davef
Use the IPC calculator [free at http://www.ipc.org]
Electronics Forum | Thu Dec 14 22:28:38 EST 2006 | Tony
Hi, where can I find info about how to make the pad design to work for VSSOP48 0.4 mm Pitch & TSSOP56 0.5 mm pitch components? I should also mention that we are working in a project that this 14 layers High-Frequency RoHS board is included. The pad c
Electronics Forum | Fri Jul 24 01:28:00 EDT 1998 | Alex Ondi
I also heard of a company considering a patent on aperture design. The aperture was a "chevron" aperture, very similar to the "V" shaped aperture recently touted in SMT magazine, presumably for the purpose of reducing solder balls. Go figure!
Electronics Forum | Tue Dec 19 17:17:14 EST 2006 | James
Let me get this straight. You have large apertures for some reason? If this is the case you could try making the aperture like a screen, many small apertures to support the blade, rather than one large aperture that allows the blade to deflect.
Electronics Forum | Mon Nov 15 12:13:41 EST 1999 | Dave F
Steve: There are guidelines for determining if your aperture has the correct proportions to the foil thickness. Maybe that�s what you�re looking for: 1 Aspect ratio = aperture width/foil thickness Chemically etched SB GT 1.5 Laser cut SB GT 1.2
Electronics Forum | Tue Oct 24 15:08:42 EDT 2000 | Steve Thomas
I meant aperture width and stencil thickness, not land width and aperture width. Sheesh.
Electronics Forum | Thu Jun 22 12:50:13 EDT 2000 | JAX
Igmar, Although I agree with Chrys that square is good,( Better volumn ) his explanation is not entirely correct. Heres a little insert from automata: With square apertures, solder paste is deposited at the center of the aperture. The center release
Electronics Forum | Thu May 01 09:19:59 EDT 2003 | davef
ehess Why do YOU want to block apertures to keep solder from pads?
Electronics Forum | Tue Apr 04 11:51:44 EDT 2006 | dougs
10mil square apertures should be ok with your 4mil stencil.
