From: Steve Kelly [mailto:[log in to unmask]] Sent: April-08-09 2:46 PM To: IPC ([log in to unmask]) Subject: IPC 6013B Good Afternoon, I have been reading the new release of IPC 6103B and have some questions/concerns surrounding Section 3.3.2.13 Stiffener Bonding. Under 6013A a stiffener was treated as a mechanical support only and voids were allowed. So if one was using a PSA or a thermo set adhesive , in my opinion there was rarely an issue. Under 6013B in my opinion the stiffener paragraph has become very onerous with the supplier having to sign up to not only void sizes but also % of voids. If for example a supplier was building a 4-6 layer flex with a solid metal stiffener underneath how would you ever prove you meet this paragraph consistently? I see the same issues on thick FR-4 stiffeners. I would appreciate hearing back from someone on the committee of what was the rationale behind this new requirement. Regards Steve Kelly Steve Kelly (PLEASE NOTE NEW E-MAIL ADDRESS) (416) 750-8433 (work) (416) 750-0016 (fax) (416) 577-8433 (cell) --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------