Patent ID: 8816281
Filing Date: 2014-08-26
Classification: H01J,H05H,Y10T

Abstract:
1. An ion energy analyzer for use in determining an ion energy distribution of a plasma, the ion energy analyzer comprising: a first substrate processed to form an entrance grid having a first channel therein and a first plurality of openings extending therethrough; a second substrate processed to form a selection grid having a second channel therein and a second plurality of openings extending therethrough; a light source positioned on a first side of the entrance grid and the selection grid and configured to transmit light through the first and second plurality of openings; a photodiode positioned on a second side of the entrance grid and the selection grid that is opposite the light source and configured to receive the light transmitted from the light source as the light is transmitted through the first and second plurality of openings; the first and second substrates being vertically aligned by adjusting the first and second plurality of openings of the entrance grid and the selection grid relative to each other such that the photodiode detects a maximum of the light transmitted vertically from the light source through the first and second plurality of openings to the photodiode on the opposite side of the vertically aligned substrates; a third substrate processed to form an ion collector having a third channel therein; and the entrance grid being operatively coupled to the selection grid by DC isolating the entrance grid from the selection grid and the selection grid from the ion collector.