Hi Wee Mei - one mistake in my last email - the X-ray gauge is a Penetrameter and not a penetrometer. Dave Lum Wee Mei <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 01/13/2012 01:29 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Lum Wee Mei <[log in to unmask]> To <[log in to unmask]> cc Subject [TN] BGA X-ray baseline setting Dear TechNet Buddies, In IPC-A-600, the standard provides states the inspection magnification requirement. For external observation : at 1.75x and progress to 40x if acceptable condition of a suspected defect is not apparent. Such inspection magnification requirement is not given in IPC-7095 for BGA x-ray. What is the common industry practice on : (a) Tube voltage (b) Tube power (c) Filter strength (d) Averaging I asked because I worry that I may unintentional set a 'wrong' tube voltage that could result in the effect known as "Voltage Blooming'. I do not want to cause false alarm due to my incompetency and result in wrong inspection judgment on the void size. Thanks and regards, ~wee mei~ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 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 For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------