Of course, but he was asking which standard allowable tolerances were identified in, and that would be those documents... I did not see in the message where he was looking for fabrication capabilities or design metrics. Franklin -----Original Message----- From: Jeffrey Bush [mailto:[log in to unmask]] Sent: Wednesday, January 25, 2006 8:19 AM To: [log in to unmask] Subject: RE: [TN] Soldermask Tolerance Just to interject - IPC-6012/600 only provide the allowable soldermask on land areas by annular ring or pitch dimension of SMT. When needing to understand the PCB fab capability during design, these standards do not offer guidance as they are dependant on specific fabricator capabilities. IPC-2221 does provide a clearance metric, which is .13 mm, but should also be considered in conjunction with interconnect design and materials selection. Jeffrey Bush Director, Quality Assurance and Technical Support VERMONT CIRCUITS INCORPORATED 76 Technology Drive - POB 1890 Brattleboro, Vermont 05302 Voice - 802.257.4571 ext 37 Fax - 802.257.0011 <http://www.vtcircuits.com/> -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Franklin D Asbell Sent: Wednesday, January 25, 2006 8:28 AM To: [log in to unmask] Subject: Re: [TN] Soldermask Tolerance Brian, Review IPC 6012 and IPC-A-600, these will provide text and images of solder mask registration allowances. Franklin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Pulis Sent: Wednesday, January 25, 2006 6:17 AM To: [log in to unmask] Subject: [TN] Soldermask Tolerance hi all, does anyone know if there's a standard which specifies the maximum allowable soldermask shift for non-soldermask defined pads. regards > Brian Pulis > Process Engineer > > Dedicated Micros Malta Ltd. > UB2, San Gwann Industrial Estate, > SGN 09. MALTA. > > Tel: (+356)23819 187/199 > > Fax: (+356)23819 100 > > --------------------------------------------------- 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 -----------------------------------------------------