There's an article in the January issue of Advanced Packaging that
suggests using "layout fluid" like they use in machine shops for marking
materials.  The article is available on their web site at
http://ap.pennnet.com



Date:         Thu, 16 Jan 2003 14:11:59 -0600
Reply-To:     "TechNet E-Mail Forum." <[log in to unmask]>,
              Bill Christoffel <[log in to unmask]>
Sender:       TechNet <[log in to unmask]>
From:         Bill Christoffel <[log in to unmask]>
Subject:      Re: BGA Dye Penetrant
X-To:         "TechNet E-Mail Forum." <[log in to unmask]>,
              [log in to unmask]
Content-Type: text/plain; charset="Windows-1252"

In my past life we used zyglo prodcut that worked well to detect cracks in
and around chip on substrate (hybrid) circuits.  I did a google search and
found this contact: www.vobaker.com/ndt/zguide.htm

Bill C.

-----Original Message-----
From: Victor Hernandez [mailto:[log in to unmask]]
Sent: Thursday, January 16, 2003 2:06 PM
To: [log in to unmask]
Subject: [TN] BGA Dye Penetrant

Fellow TechNetters:

Any beamers out there from Fishkill or Burlington

Back in the days with Big Blue a fluorescence yellow solution was used
to detect BGA interface voiding.   The
solution was detectable under black light.   The sample and solution were
pressurized to accomplish the task.   I
have TRIED to use the Steel Red DYKEM for a similar project with no
success.
Can one shared their experience
with void detecting techniques and/or materials.

In advance I will thank you for your timely response in this matter.

Victor G. Hernandez



---------------------------------------------------
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
-----------------------------------------------------