IPC-7351B Generic Requirements for Surface Mount Design and Land Pattern Standard Description: IPC-7351B includes both the standard and an IPC-7351B land pattern calculator on CD-ROM for accessing component and land pattern dimensional data.The calculator includes the document’s mathematical alg...
Conductor Spacing and Voltage Calculator TRY TOOL Difference between PCB land pattern and footprint The terms land pattern and footprint are used interchangeably in the PCB manufacturing industry. However, there are certain differences between them when we consider their functionality. A component can...
5-10 of 35 1/9/2008 IPC-7351A LP Viewer V7.00 User Guide SMD CALCULATOR SEARCH The Land Pattern Name is also derived from the component dimensions and in this example it’s broken into 6 parts: 1. The component family prefix –“QFP” 2. The component pin pitch E = 0.50mm for “...
YTD 2018, the current committee has decided to remove the Fabrication and Assembly Tolerances in the upcoming release of 7351C. Leave them in the Calculator but turn the values to 0.00. This will have a minimal impact on the resulting land pattern as the pad sizes will be 0.01 – 0.04 mm...
IPC-7351 directs users on an appropriate land pattern based on desired component density through the provision of three separate land pattern geometries for each component. The new B revision of the standard introduces land pattern design guidance and rules for new surface mount component families su...