Mask data preparation

Mask data preparation (MDP), also known as layout post processing, is the procedure of translating a file containing the intended set of polygons from an integrated circuit layout into set of instructions that a photomask writer can use to generate a physical mask. Typically, amendments and additions to the chip layout are performed in order to convert the physical layout into data for mask production.

Mask data preparation requires an input file which is in a GDSII or OASIS format, and produces a file that is in a proprietary format specific to the mask writer.