Apparatus and method for etching

An apparatus includes a chamber, a pedestal configured to receive and support a semiconductor wafer in the chamber, and an edge ring disposed over the pedestal. The edge ring includes a first portion having a first top surface, a second portion coupled to the first portion and having a second top su...

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Bibliographische Detailangaben
Hauptverfasser:	YANG, YU-LUNG, CHEN, SHIH-TSUNG, YEH, SU-YU, HUANG, BING-KAI, LIN, HUNG-BIN, YIN, LIAO, WANG, YINGIEH
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY PLASMA TECHNIQUE PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:	An apparatus includes a chamber, a pedestal configured to receive and support a semiconductor wafer in the chamber, and an edge ring disposed over the pedestal. The edge ring includes a first portion having a first top surface, a second portion coupled to the first portion and having a second top surface lower than the first top surface, and a recess defined in the first portion. The second top surface is under the semiconductor wafer. The recess has a depth, and a distance between the pedestal and an inner surface of the recess is substantially equal to the depth of the recess.