Apparatus and method for plasma etching
US8083889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2009 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/67069
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plasma etching apparatus capable of performing processing with excellent in-plane uniformity on an object to be processed having a large diameter is provided. The present invention provides a plasma etching apparatus including a processing chamber 13 which performs plasma processing on an object to be processed 1, a first processing gas supply source 40, a second processing gas supply source 50, a first gas inlet 65-1 which introduces a processing gas into the processing chamber, second gas inlets 65-2 which introduce the processing gas into the processing chamber, flow rate regulators 42 and 53 which regulate the flow rate of the processing gas and a gas shunt 60 which divides the first processing gas into a plurality of portions, wherein at least two gas pipes branched by the shunt 60 are provided with the first gas inlet 65-1 or second gas inlets 65-2 and merging sections 63-1 and 63-2 are provided between the shunt 60 and the first gas inlet 65-1 and between the shunt 60 and the second gas inlets 65-2 for merging the second processing gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.