You will find it referenced briefly in 6012, it might even be in IPC 2221 but dimensions would not be included. Typically the user (buyer, customer, assembler, etc) would include their requirements in the fab drawing or spec. A v-score of 2/3 board thickness is most common; however, this is most often used for .049 - .062 thick boards. 2/3 rule would not work well with a .150 thick board and would cause all sorts of problems on an .030 board. You can mix score and rout (web cut) and can also skip-score (or jump score) which is most common on thinner boards. Score depth like nearly everything board related has many variables which would control it, for example, will an post-score machine be used, will the array be in a frame during assembly, individual piece size and number in the array, are components attached close to the edge, near the score line, are there through hole components, are components attached to one side or both. Those and a myriad of other variables will dictate the type and depth of score. If you provide some specific features we would be glad to offer more insight. Franklin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Joel Mearig Sent: Wednesday, October 05, 2005 4:52 PM To: [log in to unmask] Subject: [TN] PCB Score Depth Is there a specification for score depth on PCBs? In other words does one always leave the same amount of web after scoring regardless of the board thickness or is it a percentage of board thickness? Thanks Joel --------------------------------------------------- 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 -----------------------------------------------------