Per the requirements of the pending release of Rev D of IPC-SM-840, the PCB shall be cleaned to achieve an acceptable level of cleanliness. The determination of cleanliness shall be per IPC-TM-650, Method 2.3.25; Method 2.3.25.1; Method 2.3.28; Method 2.3.38; or Method 2.3.39. Dewey -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Kevin Glidden Sent: Tuesday, April 04, 2006 8:05 AM To: [log in to unmask] Subject: [TN] PCB cleanliness prior to soldermask Is there a spec for testing a bare PCB prior to solder mask application? Is it customary to perform an ionic cleanliness test prior to application of SM? Kevin Glidden Manufacturing Engineer Luminescent Systems Inc. 4 Lucent Drive Lebanon, NH 03766-1439 Tel # (603) 643-7766 ext. 3152 Fax # (603) 643-5947 --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------