Hi Genny,
Amkor has the following packages available:
PBGA304
Body Size = 31 mm
Ball Pitch = 1.27 mm
Ball Matrix = 23 x 23
Ball Diameter = 0.76 mm
SBGA432
Body Size = 40 mm
Ball Pitch = 1.27 mm
Ball Matrix = 31 x 31
Ball Diameter = 0.76 mm
PBGA196
Body Size = 15 mm
Ball Pitch = 1.0 mm
Ball Matrix = 14 x 14
Ball Diameter = 0.51 mm
PBGA256
Body Size = 17 mm
Ball Pitch = 1.0 mm
Ball Matrix = 16 x 16
Ball Diameter = 0.51 mm
If your parts match any of these, you may want to try Amkor's web site.
They have land patterns available there for many of their packages.
I hope this helps.
Sincerely,
Debbie Goodwin
Account Representative
10867 Portal Dr
Los Alamitos, CA 90720
Phone = (714) 252-0010
Fax = (714) 252-0026
PLEASE NOTE - Effective Immediately New e-mail address is:
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-----Original Message-----
From: Genny Gibbard [mailto:[log in to unmask]]
Sent: Tuesday, November 06, 2001 7:25 AM
To: [log in to unmask]
Subject: [TN] BGA's in design
OK, in the next few months we will probably design our first board that uses
a BGA, and we are jumping in with both feet. This board will have a 304
ball 1.27mm pitch, a 432 ball 1.27mm pitch, a 196 ball 1.00mm pitch and a
256 ball 1.00mm pitch.
Are there any resources for free land patterns for these babies? Or how do
you determine the pad size knowing the ball diameter and pitch? Almost
every place I found on the web with BGA patterns was selling them. I was
looking at the table of contents for the SM-782A standard and it only
mentioned 1.27pitch. Is the information in the standard easily scalable to
smaller pitch? It could be a hard sell to convince my company to buy
patterns, which means we will probably make our own which doesn't always
make for very good DFM.
Secondly, (I hesitate to ask this, because I may get a bunch of
solicitations, but) does anyone have some recommendations for board
fabricators in Canada that can handle the BGA requirements? We have had
questionable quality from most or all of our current board vendors at some
time or another (remember the switched inner layers?) and I am looking for
some new sources.
Regards.
Genny Gibbard (mailto:[log in to unmask])
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