Jowan, We follow IPC 7525-S Section 3.2. Sometimes we have unusual board designs such as multi component pad designs and we have to make special modifications. So if you product design is compliant to IPC specifications then 7525 would be a good place to start. If not then most of the time your stencil venders have plenty of experience with the "unique" designs and can make recommendations. >>> Jowan Iven <[log in to unmask]> 6/12/2003 7:53:11 AM >>> Hi all, I just got back from a colleague who had a question about a stencil. It concerned reductions of apertures in a stencil and got me thinking about our own guidelines. So now I'm wondering what guidelines you all use for stencils. X% area reduction? , X% reduction in width and height, predefined reduction (mils/mm), other guidelines ???? In other words; which set of rules do you , experienced guys and girls, apply? regards Jowan Iven -------------------------------------------------------------------------- DISCLAIMER: The information contained in this communication is confidential and may be legally privileged. It is intended solely for the use of the individual or entity to whom it is addressed and others authorized to receive it. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or taking any action in reliance of the contents of this information is strictly prohibited and may be unlawful. Stork is neither liable for the proper and complete transmission of the information contained in this communication nor for any delay in its receipt --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------