ALLEGRO PCBLAYOUT tutorial: Create disk and library - load netlist - layout and routing - proofreading and review - film output Ⅰ. Create disk and library: Ⅰ. Ⅰ. Create disk In ALLEGRO, pads can be divided into three types: surface mount pads, plug-in pads, and installation pads. Before creating a disk, we need to formulate different naming methods to distinguish different pads. For example: C60D32 C represents a circular pad, and D represents a drill hole. 60 represents the pad diameter, and 32 represents the aperture. Surface mount pads can be indicated by adding SMD in front. For example: SMDC25 SMD represents a surface mount pad, and C represents a circle. 25 represents the diameter of the pad. Installation pads can be indicated by adding M. See the figure below for the specific settings for creating a disk:
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