It takes intents effort to do it right. Dependent on size a dry film cap followed by a LPI cover has been one method to achieve satisfactory results in a high-rel environment. Dewey -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Cal Driscoll Sent: Friday, August 27, 2004 10:15 AM To: [log in to unmask] Subject: [TN] tented Via Hello All- I am not a board fab person but would like to understand why some LPI masking processes can not tent vias (non filled). We have a board house that can tent vias with no issues. When we went to another board house the are unable to tent vias. Both shops are huge and have international locations. I would think the technology would be there to do this. thanks in advance, Cal www.ctdi.com --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------