Hello Susan, I believe your customer is talking about Acoustic Microscopy. One such instrument...Scanning Laser Acoustic Microscope...or, Sono Scan. Regards, Hans Shin Pacific Testing Laboratories, Inc. http://www.pacifictesting.com/ -----Original Message----- From: [log in to unmask] [SMTP:[log in to unmask]] Sent: Tuesday, February 20, 2001 8:35 AM To: [log in to unmask] Subject: [TN] Conductor Crack Detector Had an inquiry from a customer. They had heard of an "ultra-sonic" instrument that could detect cracks or opens in external and internal traces on boards. I haven't seen anything like this - has anyone else??? Susan Mansilla Robisan Lab --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------