BGA placement on PGA

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We have been presented with the task of placing a BGA on top... - Nov 07, 2002 by

Converting BGA to PGA. Yes!!! Wouldn't want progess in pac... - Nov 07, 2002 by davef

The XRAY looked okay with minimum voids throughout. Custome... - Nov 07, 2002 by

Just a link to a former customer of mine. ... - Nov 07, 2002 by Jon Fox

Questions are: * So, what is your thinking on this "insuffi... - Nov 08, 2002 by davef

Debi Musante

#22323

BGA placement on PGA | 7 November, 2002

We have been presented with the task of placing a BGA on top of a PGA. The previous process choice was to apply paste directly on the BGA (which failed functional testing) We are considering applying tacky flux (only) on BGA, since this is our first attempt any suggestions will be appreciated

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davef

#22324

BGA placement on PGA | 7 November, 2002

Converting BGA to PGA. Yes!!! Wouldn't want progess in packaging design to slow us down, would we? [Haaaaa. Just kidding. Probably has something to do with legacy designs; form, fit and function; and all that stuff.]

Tacky flux only, like a rework operation to replace a BGA, sounds good.

What was it about your paste approach that caused it to fail in test?

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Debi Musante

#22325

BGA placement on PGA | 7 November, 2002

The XRAY looked okay with minimum voids throughout. Customer reports insufficient contact causing intermitten failures.

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Jon Fox

#22326

BGA placement on PGA | 7 November, 2002

Just a link to a former customer of mine.

http://www.adapter-tech.com/

They have adaptive sockets for placement of BGA onto PGA designed PWB.

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davef

#22351

BGA placement on PGA | 8 November, 2002

Questions are: * So, what is your thinking on this "insufficient contact causing intermitten failures"? * How do you print the paste? * Where do you place your therocouples when measuring reflow temperature? * What kind of solderability protection is on the BGA pads of your BGA-to-PGA converter? How thick were these platings?

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