Patent ID: 8888086

Claim:
An apparatus comprising: a surface to be protected; a chamber configured to receive the surface to be protected; a protector plate distinct from the chamber and designed to be affixed within the chamber independent of the surface to be protected, the protector plate being fabricated of an electrically conductive material; a support mechanism affixing the protector plate to and suspending the protector plate within the chamber in spaced, opposing relation to the surface to be protected without contacting the surface to be protected, and with a gap between the protected plate and the surface that presents a diffusion barrier to particle migration into the gap and onto the surface between the protector plate and the surface due, at least in part, to physical proximity of the protector plate to the surface to be protected, thereby inhibiting particle contamination of the surface, the surface to be protected being insertable or removable from the chamber independent of the protector plate; and a power source electrically coupled to the protector plate, the power source electrically charging the protector plate so that the protector plate suspended within the chamber over the surface to be protected is an electrostatic trap; wherein the apparatus further comprises a process structure comprising a reticle, a mask, a mask blank, a wafer, a substrate, or a plate, the surface to be protected being a first side of the process structure and wherein the process structure further comprises a conductive material on a support surface thereof, the support surface being a second side of the process structure, the first side and the second side being opposite sides of the process structure, and wherein the power source further electrically couples to the process structure to facilitate evaluating parallelism of the protector plate and the surface to be protected.