Talk:Ball grid array

I put some sample instructions for re-balling and it has been removed! It is useful and relevant information. Please justify.

I just added an xray photo of the BGA joints - does that help? DJGB 09:29, 11 October 2006 (UTC)

No further comments, so I'm going to remove the cleanup tag DJGB 10:24, 31 October 2006 (UTC)

Do not touch the balls?

Does anybody knows, whether it is possible to test a BGA housing (contacting the balls) and afterwards to solder it normally to a PCB. Or is the BGA destroyed by testing, which would be a disadvantage as it would not be possible to do a final product verification of a BGA packaged device. Michilans (talk) 16:30, 2 December 2008 (UTC)

 I can think of no reason why not. ICs are tested all the time.

Sharper X-ray

There is a much sharper X-ray image at http://upload.wikimedia.org/wikipedia/commons/6/61/X-Ray_USB-Stick_Intenso_High-Speed_32GB_broken.jpg It is still unclear (to me at least) how the bond wires reach the balls. 69.239.104.44 (talk) 13:50, 18 June 2010 (UTC)

History?

If someone knows and have a bit to tell about the development of the BGA package. Please add it & references. Electron9 (talk) 20:40, 22 March 2008 (UTC)

uBGA/μBGA/micro BGA/TinyBGA(TM)

What about these? For example, what's the exact difference between BGA & uBGA ? Like, if pitch is bigger than 0.5mm it's BGA, but if it's 0.5mm or smaller it's uBGA, or what?

If you remove the solder, from a BGA chip, are there bumps, or just pads ? Like a PCB has it's pads flat against the board substrate. --DaveDodgy (talk) 14:05, 23 April 2008 (UTC)

Finest pitch

What's the finest pitch a (μ)BGA chip has been made ? As in, the width of the pad & the spacing between pads (centres, not edge to edge).--DaveDodgy (talk) 18:25, 10 May 2008 (UTC)

Sometimes?

Article: "BGAs do not have this problem, because the solder is sometimes factory-applied to the package in exactly the right amount." So, do they sometimes not have the problem because sometimes this is done and sometimes for other reasons? Or do they sometimes have the problem because the factory didn't apply the solder? --128.197.11.28 (talk) 14:51, 4 August 2008 (UTC)

External links

• Some external links is useless for article. Need cleanup...--Berserkerus (talk) 16:05, 15 November 2008 (UTC)

Most of the external links were useless. All except for one have been removed. Rilak (talk) 05:58, 16 November 2008 (UTC)

BGA lineage

The first sentence of the Discussion section is "The BGA is descended from the pin grid array (PGA)". I disagree. Soldering and inserting pins into sockets are two different ways of making electrical connections, but one is not a descendant of another anymore than a car is a descendant of a horse (two different means of transportation).

Additionally, the grammar is incorrect: "is descended" should be changed either to "is a descendant" or to just "descended". —Preceding unsigned comment added by 74.96.187.144 (talk) 18:51, 14 November 2009 (UTC)