Forgot to give you a good reference that I read myself up and then to keep old brain updated. With this article you learn a lot about the PTH conditions! Professionals in this forum may smile and see this as college lab instructions, but for us as amateurs, it's worth reading. http://www.thinktink.com/stack/volumes/volvi/copplate.htm#swish Good Luck! Inge -----Ursprungligt meddelande----- Från: TechNet [mailto:[log in to unmask]] För Ingemar Hernefjord Skickat: den 30 november 2005 00:18 Till: [log in to unmask] Ämne: [TN] SV: [TN] Via Cracking in flex cable Hi Mumtaz, My reaction is that there seems to be no hole stiffeners. And the barrels are not uniform. Inge -----Ursprungligt meddelande----- Från: TechNet [mailto:[log in to unmask]] För Mumtaz Bora Skickat: den 29 november 2005 05:02 Till: [log in to unmask] Ämne: [TN] Via Cracking in flex cable Dear All, We have an issue with flex cables cracking in cellphone assembly. X-sections are showing voids, some residue and cracking in the via. It appears to be a combination of smear remove and copper plating problem. Any insight from the flex circuit and plating experts will be appreciated. I have asked Stephen Gregory to post the X-sections on his website. Thank-you Mumtaz D/ 252 - SMT Process and Component Quality Bldg. V238E Voice (858)-882-1967 Fax (858)-882-3126 Page (858)-635-1180 Cell: (858) -449-7054 email: [log in to unmask] Kyocera-Wireless Corp. 10300, Campus Point Drive San Diego, Ca 92121,USA --------------------------------------------------- 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 -----------------------------------------------------