I believe IPC-D-325 provides information on "documenting" the requirements and does not provide much information on "requirements" of materials used. Does it really specify "finished" thicknesses? Or merely provide guidelines on how to document or convey the information regardless of what it is? Franklin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of valerie St. Cyr Sent: Monday, October 16, 2006 1:29 PM To: [log in to unmask] Subject: Re: [TN] laminate thickness - new replacement chart for old D-275 Table 3-5 please clarify for me (I'm sluggish today): do you want the thickness specification for each individual core in the construction, without the copper foils on the core, or do you want the thickness specification for the total PCB thickness over laminate, excluding the external foils and plating ? If the latter, see IPC-D-325 A, page 32, Figure 5-1, Typical Multilayer Master Drawing. Valerie Franklin D Asbell <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 10/16/2006 01:22 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Franklin D Asbell <[log in to unmask]> To [log in to unmask] cc Subject Re: [TN] laminate thickness - new replacement chart for old D-275 Table 3-5 Phil, Look in IPC 4101. Also, if you type "pcb laminate thickness" into an internet search engine (i.e. Yahoo) it will link you to sites that have this information free. A word of caution, by specifying "finished" laminate thickness you may be limiting the flexibility of the fabricator and most likely increase the cost of the product. I would suggest you get feedback from your main suppliers of pcb fabs before you implement this type change. Franklin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting Sent: Monday, October 16, 2006 10:41 AM To: [log in to unmask] Subject: [TN] laminate thickness - new replacement chart for old D-275 Table 3-5 In IPC-D-275 there was a chart (Table 3-5) which defined "IPC Standard Laminate Number" in steps L1-L16. Has that been replaced by a newer document? If so, can you point me to it please? We are attempting to specify the finished laminate thickness, without the copper factored into the measurement. Thanks in advance, Phil --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------