The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 2003
Filed:
Apr. 11, 2001
Yogendra K. Chawla, Pittsford, NY (US);
David Freese, Rochester, NY (US);
ENI Technology, Inc., Rochester, NY (US);
Abstract
An apparatus is disclosed wherein a dual directional harmonics dissipation filter includes an input terminal coupled to a RF power amplifier providing a radio frequency signal in a predetermined frequency range, an output terminal for providing the radio frequency signal to a load at the predetermined frequency range, a low pass filter connected between the input terminal and the output terminal, and a plurality of high pass filters coupled to the low pass filter wherein the plurality of high pass filters receive and dissipate signals in excess of the predetermined frequency range and wherein the plurality of high pass filter's effect on the impedance is offset at the input and output of the low pass filter. Energy dissipation in an RF generator system is accomplished by supplying an RF signal from a RF power amplifier, diverting signals from the RF power amplifier having frequencies in excess of a predetermined frequency range to a first high pass filter, dissipating the signal in excess of the predetermined frequency range, and receiving harmonic energy from a plasma chamber to a second high pass filter, and dissipating the harmonic energy.