yes, Tim is right what I have mentioned is in deg celcius Madhu "Tim Reeves" <Tim.Reeves@mem-o To: "Rick" <[log in to unmask]>, <[log in to unmask]>, r.com> <[log in to unmask]> cc: 26/03/03 04:53 AM Subject: RE: Laminate voids & resin recession I think he means 2.5 deg C/min which is about 4.5 deg F /min, which is still quite slow. 10-12 might be higher than optimum as well. Many products recommend 8-12 degF/min or so. 5 deg C/min (9 deg F/min) is probably safe for just about any FR-4 type product. As far as the KISS cycle goes, usually you want to increase to high pressure at about 200-220F. Earlier is better than later. Best Regards, Timothy Reeves Technical Service Engineer - Matsushita Electronic Materials, Inc. 4114 Heather Street, Forest Grove, Oregon, 97116 Main (503) 357-8695 Direct (503) 992-5109 Cell (503) 781-1495 Fax (503) 357-8868 -----Original Message----- From: Rick [mailto:[log in to unmask]] Sent: Tuesday, March 25, 2003 4:14 AM Subject: Re: Laminate voids & resin recession 2.5 deg/min. is a little slow. Try and aim for 10-12 deg/min. The lower the rate of rise the more viscous the resin which means it won't flow as much. Also, try going into full pressure right away. This will also force the resin to flow. I've found kiss cycles don't buy you much plus the operator might forget to go into full pressure before the resin starts to cure (if you're press doesn't do it automatically). Double check your vacuum pressure. You should have at least 27 in. Hg. Rick Babyak Process Engineer Proto Circuit Inc. 7 Ascot Parkway Cuyahoga Falls, OH 44223 330-572-3400 330-572-3434 fax --------------------------------------------------- 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 ----------------------------------------------------- Virus checked with Mail Sweeper! Clean. by AT&S India ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the mail system admin at AT&S India Limited [log in to unmask] This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.mimesweeper.com ********************************************************************** --------------------------------------------------- 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 -----------------------------------------------------