Abstract: A method of preparing a surface of a counterbore surrounding an orifice in an orifice layer includes determining a property of a fluid to be ejected through the orifice, and controlling a surface characteristic of the counterbore surface based on the property of the fluid.

Abstract: A surface characteristic is determined by a property of a fluid capable of contacting the surface. The surface characteristic is based on the property of the fluid.

Abstract: A fluid ejection device comprises a substrate including a fluid ejector thereon, and an orifice member positioned over said substrate. The orifice member has a fluid-transfer bore extending therethrough and corresponding to the fluid ejector. The orifice member further has a counter-bore about the fluid-transfer bore.

Abstract: A fluid ejection device comprises a substrate including a fluid ejector thereon, and an orifice member positioned over said substrate. The orifice member has a fluid-transfer bore extending therethrough and corresponding to the fluid ejector. The orifice member further has a counter-bore about the fluid-transfer bore.

Abstract: A surface characteristic is determined by a property of a fluid capable of contacting the surface. The surface characteristic is based on the property of the fluid.

Abstract: Clusters, such as Argon gas clusters, provided by a cluster source are doped in a water pick-up cell, and subsequent electron impact ionization of the doped clusters in a mass spectrometer or gas analyzer produce ionized cluster fragments that retain water. Water is supplied under pressure to the pick-up cell disposed within a vacuum chamber, and the water pressure is metered by a metering valve and monitored by a pressure gauge. A vacuum pump is coupled to the vacuum chamber that generates a vacuum within the vacuum chamber and pick-up cell. Interaction between the gas clusters and the water in the pick-up cell produces doped clusters, some of which retain water. The electron impact ionized doped cluster fragments are analyzed using the mass spectrometer or gas analyzer permits determination (detection) of the mean cluster size of the clusters.

Abstract: A pulsed plume of laser ablated photo-ionizable material is emitted from a target in a vacuum, and a pulsed beam of light thereafter produces ionization of two plume sections straddling a central nonionized plume portion. A mask is provided, intermediate the plume and the laser generating the ionizing pulsed beam of light, to shield the central plume portion to prevent ionization thereof. The ionized portions of the plume are swept away from the vicinity of the non-ionized plume portion by a magnetic field, and the remaining nonionized portion passes through an aperture in a retrieval mask to produce the output of the atomic source.