Inventors:
Manish Chandhok - Beaverton OR, US
Eric Panning - Hillsboro OR, US
Bryan J. Rice - Hillsboro OR, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01J 35/00
US Classification:
250504R, 250251, 378119, 378121, 31511181, 31511191, 2041582
Abstract:
According to a first embodiment of the invention, a dual cathode electrode for generating EUV light is disclosed. The dual cathode electrode may include a first outer cathode, a second inner cathode, and an anode disposed between the inner and outer cathodes. The dual cathode electrode also includes a plasma disposed in between the cathodes that emits EUV photons when it is excited by an arc between the anode and the cathodes. According to a second embodiment of the invention, several Dense Plasma Focus (DPF) electrodes are placed along a circle. The DPF electrodes, when activated, will emit electron photons from the circle in which they are placed thereby avoiding obscuration used to protect UV mirrors against debris.