Patent ID: 7833426

Claim:
A fluid ejection microdevice forming method comprising: lasering a substrate comprising a first surface and a second surface substantially opposed to the first surface to remove substrate material from the substrate to form a first fluid slot therein, the first fluid slot extending along a first bore axis that is not transverse to the first surface of the substrate in a direction that is toward the second surface of the substrate and away from a third surface of the substrate; and lasering the substrate to remove substrate material from the substrate to form a second fluid slot therein, the second fluid slot extending along a second bore axis that is not transverse to the first surface in a direction that is toward the second and third surfaces of the substrate; at least one of the first fluid slot and the second fluid slot comprising a first set of sidewalls disposed at a first non-transverse angle from the first surface and a second set of sidewalls disposed at a second non-transverse angle from the first surface, the first non-transverse angle being different from the second non-transverse angle.