Print head die

An apparatus to print on media moved along a media path, comprising:

• a first row of independent print head dies spanning across the media path, each of the print head dies in the first row having print structures including a leading print structure with respect to the media path;
• a second row of independent print head dies spanning across the media path staggered with respect to the first row along the media path, each of the print head dies in the second row having print structures including a leading print structure with respect to the media path;
• wherein an extent between respective leading print structures of print head dies in the first row and print head dies in the second row is between a minimum value and a maximum value computed from a function of expected variation in position of the media and maximum allowable dot placement error for the first and second print structures.

A method of assembling a print bar to print on media moved along a media path, comprising:

• placing a first print head die on a support structure, the first print head die having first print structures disposed along a major dimension thereof perpendicular to the media path, the first print structures including a leading print structure with respect to the media path;
• and
• placing a second print head die on the support structure, the second print head die having second print structures disposed along a major dimension thereof perpendicular to the media path, the second print head die being placed such that the second print head die is staggered with respect to the first print head die along the media path, the second print structures including a leading print structure with respect to the media path, a separation between respective leading print structures of the first and second print head dies is between a minimum value and a maximum value computed from a function of expected variation in position of the media and maximum allowable dot placement error for the first and second print structures.