Electronics Forum: diamond (Page 1 of 6)

BGA Assembly

Electronics Forum | Wed May 29 19:04:39 EDT 2002 | russ

I have heard of using diamond apertures for BGAs to tell you in XRay inspection if you reflowed (diamond means that paste did not reflow) that is the inly thing I coud think of as to why you qould want to do this. Russ

BGA Assembly

Electronics Forum | Wed May 29 11:11:16 EDT 2002 | jax

Are you using Diamond apertures to achieve a volumn you cannot get through round ap's?

BGA Assembly

Electronics Forum | Wed May 29 13:10:55 EDT 2002 | wilcoxito

Diamond apertures were just an idea proposed by my plant manager. They are not necessary, by far. Thanks for all your input.

BGA Assembly

Electronics Forum | Tue Jun 04 12:33:57 EDT 2002 | dason_c

We use the diamond shape on the CBGA/CCGA only, all the PBGA are using the regular round shape.

Wire Bonding fiducial mark specifications

Electronics Forum | Tue Jan 30 17:58:49 EST 2007 | flipit

Hi, I would not be too concerned about what the shape of your wirebonding fiducial is. Cross, Square, Diamond, Circle, will all work well for you. I use a "+" and a diamond. Your machine magnification will be great, so don't make the fiducials to

Bubbles formation in conformal coating

Electronics Forum | Tue Sep 20 09:07:23 EDT 2016 | davef

5 Common Causes of Bubbles in Conformal Coating (and Their Remedies)[Diamond-MT's Blog]

BGA Assembly

Electronics Forum | Wed May 29 10:11:50 EDT 2002 | wilcoxito

Thanks for your input, Alex. I appreciate it. I'd still like some input on diamond-shaped apertures if anyone has had experience with them.

BGA Assembly

Electronics Forum | Wed May 29 10:52:56 EDT 2002 | slthomas

Just wondering why you'd use a diamond shaped aperture? Seems like it'll just fill in the corners and be pretty much round anyway, so why not just start out that way and keep the volume you want?

BGA Assembly

Electronics Forum | Wed May 29 13:16:33 EDT 2002 | jax

The only reason I can see for doing this is: Apply more paste than a one-to-one round can provide. Square, diamond, etc... does not matter. Normally this is done for PTP applications but,... If it gets the job done, who cares.

BGA Assembly

Electronics Forum | Thu May 30 07:13:46 EDT 2002 | matherat

Ben, I am not sure about diamond shaped pads but if you are just getting into BGA you need to know about SIPAD ssd. http://www.sipad.com mkehoe

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