Patent ID: 7748824
Filing Date: 2010-07-06
Classification: H01J,H01L

Abstract:
1. An ejecting apparatus, comprising: a stage; a plurality of heads movable in a Y-axis direction relatively with respect to said stage, said plurality of heads being adjacent to each other in said Y-axis direction; and a head driving portion, wherein: each of said plurality of heads includes a first nozzle array and a second nozzle array both extending in an X-axis direction; in each of said plurality of heads, DA equals a distance between said first nozzle array and said second nozzle array; a distance between said second nozzle array in one arbitrary head of said plurality of heads and said first nozzle array in another head adjacent to said arbitrary head is substantially equal to an integer multiple of DA; said X-axis direction and said Y-axis direction intersect with each other at a right angle; said head driving portion generates a driving signal including a plurality of ejection waveforms that are repeated in predetermined ejection periods and supplies an ejection signal with each of said plurality of heads based on said driving signal; said driving signal is common to all the nozzle arrays of said plurality of heads; said plurality of heads are arranged in a first head group and a second head group, the heads in the first head group at least partially overlapping each other in the Y-axis direction, the heads in the second head group at least partially overlapping each other in the Y-axis direction, the heads in the first head group each in a non-overlapping position with respect to the heads in the second head group in the X-axis direction; a plurality of nozzles are placed in said first nozzle array and said second nozzle array such that a first nozzle pitch between the nozzles of the first and second nozzle arrays of the same head in said X-axis direction has a specific value for each of said plurality of heads; said first head group includes heads; a second nozzle pitch between the nozzles of said first nozzle array of said arbitrary head of said heads and said first nozzle array of said other head adjacent to said arbitrary head in said X-axis direction is substantially equal to 1/N of said specific value; and a distance between a last nozzle of said first nozzle array of a first head of said first head group and a first nozzle of said first nozzle array of a first head of said second head group is substantially equal to a third nozzle pitch between the nozzles of said first nozzle array of said arbitrary head of said N heads in said X-axis direction.