Transformer coupled capacitive tuning circuit with fast impedance switching for plasma etch chambers

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United States of America Patent

PATENT NO 9515633
SERIAL NO

14992558

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Abstract

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A transformer coupled capacitive tuning (TCCT) circuit for an inductively coupled plasma (ICP) chamber includes a matching circuit including a first switched capacitor circuit and a first inductor. The first switched capacitor circuit includes a first terminal, a second terminal, a first capacitor connected to at least one of the first terminal and the second terminal, a second capacitor connected to at least one of the first terminal and the second terminal, and a first switch in communication with at least one of the first capacitor and the second capacitor to vary a capacitance value between the first terminal and the second terminal. A power splitter communicates with the matching circuit and an inductive coil of the ICP chamber.

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Patent Owner(s)

  • LAM RESEARCH CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Long, Maolin Santa Clara, US 74 670
Paterson, Alex San Jose, US 110 2809

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