IPC, http://www.ipc.org,has a new standard, IPC-7351 Generic Requirements for Surface Mount Design and Land Pattern Standards, replacing IPC-SM-782. there is a viewer available and a number of land patterns from http://pcblibraries.com
here is an announcement: IPC-7351 Land Pattern Viewer and Tools IPC-7351, /Generic Requirements for Surface Mount Design and Land Pattern Standards/, is supplemented by a suite of software tools composed of land pattern viewers, calculators and generators for the creation of new part libraries. The IPC-7351 Land Pattern Viewer is a shareware program that allows users to view component and land pattern dimensional data in tabular form as well as graphical images that illustrate how a component is attached to the land pattern on the board. Download the latest IPC-7351 Land Pattern Viewer here: IPC-7351 Land Pattern Viewer – Version 3.000 <http://landpatterns.ipc.org/IPC_Viewer_V3-000.zip> (.zip)http://pcblibraries.com has the viewer and some other documents available:
Zero Orientation for CAD Library Part Construction
CAD Library of the Future - Technical Paper
CAD Library of the Future - MS-PowerPoint Presentation
IPC-7351 Land Pattern Naming Convention 1/07/05
norwood sisson
