Hi Larry!

Something I've seen done before, is to either have a silkscreened outline of
the part put on the board, or more recently with a board we built here, have
"placement cheverons" etched into the board at the 4-corners of the device. Go
to:

http://www.stevezeva.homestead.com

and look at "Placement Chevrons". Of course these have to match the outline
of the body of the part, but the operators can easily tell visually, if the
part is placed accurately or not....pretty slick if you ask me. But you do have a
battle getting the designers to incorporate something like that.

-Steve Gregory-



> I'm wondering what you all use for placement verification of uBGA? Before
> running a new setup, we take a solder sample PCB and put double sided tape on
> it. Place the components on the PCB, when its finished the machine operator
> hauls the PCB over to the techs for them to Ersa and xray it to verify
> placement accuracy of the uBGA. I'm looking for something which would allow the
> machine operator to verify the placement themselves. Purchasing additional Ersa
> and xray equipment wouldn't be an option. Any suggestions?
>
> Larry
>


-Steve Gregory-

---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------