Patent ID: 11908668
Assignee: IMPEDANS LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus for obtaining ion energy distribution, IED, measurements in a plasma processing system comprising:
a substrate for placement in the plasma processing system and exposed to a plasma;
an ion energy analyser disposed in the substrate for measuring ion energy distribution at a substrate surface during plasma processing, the analyser comprising a first conductive grid, G0, a second conductive grid, G1, a third conductive grid, G2, a fourth conductive grid G3, and a collection electrode, C, each grid separated by an insulation layer;
a battery power supply and control circuitry, integrated in the substrate, for supplying and controlling voltage to each of the grids and the collection electrode of the ion energy analyser;
wherein at least one insulation layer includes a peripheral portion which is of reduced thickness with respect to the remaining portion of the insulation layer.