There were major lawsuits involving Sumitomo, Fujitsu, Cirrus Logic, and Amkor, and possibly others, dealing with the phosphorus in IC package mold compounds. The use of this material in mold compounds is now considered 'the plague' to the IC industry, and I do not believe it will ever cycle back. People are even trying to get manufacturers of MCs to remove the tiny amount of a catalyst commonly used in MCs that contains a small amount of phosphorous in a chemical complex. Best regards, Leo Leo M. Higgins III, Ph.D. Director of Applications Engineering ASAT, Inc. 3755 Capital of Texas Highway, Suite 100 Austin, Texas 78704 ph 512-383-4593 fx 512-383-1590 [log in to unmask] www.asat.com The information contained in this electronic message is CUSTOMER/SUPPLIER PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution and copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by electronic mail. Thank you. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Genny Gibbard Sent: Friday, June 10, 2005 10:01 AM To: [log in to unmask] Subject: Re: [TN] Red Phosphorus Fire Retardant I find this discussion regarding Phosphorus, especially red, quite interesting. Just over two years ago, we had a couple of customers contact us, asking us to confirm that we have not used any components using red phosphorus in their molding compound, due to it causing component failures. Now it seems from some of this discussion that we may be returning to this substance? -----Original Message----- From: Fox, Ian [mailto:[log in to unmask]] Sent: 10-Jun-05 1:11 AM To: [log in to unmask] Subject: [TN] Red Phosphorus Fire Retardant My simplistic understanding of red phosphorus and fire retardancy is that under application of a flame the red phosphorus combines with oxygen and water from the polymer to form phosphoric acid leaving a flame-resistant char behind. The char effectively acts as a barrier and prevents access by the flame to further fuel. Regards Ian --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------