Charged particle beam drawing data production apparatus and char

Details Charged particle beam drawing data production apparatus and char Charged particle beam drawing data production apparatus and char

1995-11-08

1998-08-18

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Shape generating

G06F 1500

Patent

active

057964084

ABSTRACT:
A system for preventing deterioration of dimensional accuracy by reducing production of micro graphics at the time of production of drawing data to be input to a charged particle beam drawing apparatus. A CPU divides a design layout data into units of graphic data processing area (a step S1) and executes elimination of duplication and tone reversal processes in both X direction and Y direction (steps S2A, S2B) for the respective graphic data processing areas. Moreover, it performs, with reference to a micro graphic dimensional value, the graphic data processing result judging and selecting function in both the X direction and Y direction (a step S3) for the respective graphic data processing areas. Namely, the CPU judges as the micro graphic when the dimension of a basic graphic after the elimination of duplication and tone reversal processes is no larger than the micro graphic dimensional value, compares the two by determining the sum of such micro graphics, for example, in the X, Y directions and selects the graphic data submitted to the elimination of duplication and tone reversal process for the direction with smaller value. The CUP further performs prescribed processing (steps S4, S5) of this graphic data to complete the production of drawing data.

REFERENCES:
patent: 4878177 (1989-10-01), Ikenaga et al.
patent: 5008830 (1991-04-01), Moriizumi et al.
patent: 5636337 (1997-06-01), Boenke et al.

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