No. >>> Steve Collins <[log in to unmask]> 09/10/97 03:57PM >>> Lisa is this library available in any CAD formats such as PADS or OrCAD. Steve ---------- > From: Lisa Williams <[log in to unmask]> > To: [log in to unmask] > Subject: Re: [TECHNET] Good footprint library > Date: Wednesday, September 10, 1997 8:28 AM > > Try IPC-SM-782, Suface Mount Design and Land Pattern Standard. It is available through the IPC. $45 for member companies and $90 for nonmembers. > > Contact the IPC Order Department at: > 847/509-9700 phone > 847/509-9798 fax > [log in to unmask] email > www.ipc.org internet > > Lisa Williams > IPC Technical Staff > > > >>> Johannes Sivula <[log in to unmask]> 09/10/97 08:04AM >>> > Hi Techneters > > Does anyone know a good site/book/source , commercial/non-commercial for > SMD footprints library. > I have been assigned to update our footprint library, and I am not > satisfied with footprints > given in data books of component suppliers. I presume that those > footprints are not optimized > for IR reflow, nor carefully experimented. > > Does anyone know any mathematical formula to be used to check roughly > dimensions of a pad ? > > We make multilayer FR4 boards, HAL/Immersion Gold finish, no clean flux, > which is probably causing solder > balls. This problem is coped by reducing the size of stensil apertures. How > much it can be reduced ? > Does anyone have comment on that ? > > > Thanks for your time and cooperation. > > Brs, > > Johannes Sivula, Reliability Engineer, Tellabs Oy, ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TESTNET <your full name> To unsubscribe: SIGNOFF TESTNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TESTNET <your full name> To unsubscribe: SIGNOFF TESTNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################