What rules have to be obeyed for creation and extension of the package library?

Answer: While reading package data NEXTRA® uses the two-dimensional outline of package geometries. If a height value is given for such a package a block with the given outline and the height is automatically created. Furthermore 3D geometries for packages can be defined which are loaded automatically and used instead of such simple blocks when available. The creation of such 3D geometries for packages is done within the NEXTRA® environment using a 3D symbol editor which supported by a creation wizard creates standard packages by asking for few characteristic parameters like number of pins, pitch, lead and body shape. Additionally this 3D symbol editor can access the existing 2D package library and read that characteristic parameters to simplify the 3D package geometry creation even more. Furthermore NEXTRA® is delivered with a constantly growing 3D package library.


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