DESIGNERCOUNCIL Archives

July 1999

DesignerCouncil@IPC.ORG
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Subject:
Re: BGA Assembly by hand
From:
"<Tim Easterling>" <[log in to unmask]>
Reply To:
DesignerCouncil E-Mail Forum.
Date:
Thu, 22 Jul 1999 13:20:00 -0500
Content-Type:
text/plain
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text/plain (20 lines) 
The silkscreen or copper mark on the board is the only visual
way of determining that you have it placed correctly.
Unless you have an XRay viewer , which you would not typically
have between placement and reflow. The silkscreen mark is you your best bet
manually.
BGA's that are down to 1mm pitch are pretty forgiving with a
few thousandths of misplacement.
Good Luck on hand placing them, and  hope you have a steady hand
until your placement equipment is in use.


Tim Easterling
Cadd Manager Commercial Engineering
SCI Systems Inc.
8600 S. Memorial Parkway MS 200
Huntsville, Al. 35802
(256)882-4426 (ph)
(256)882-4700 x4426 (voicemail)
(256)882-4304 (fx)

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