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:
Dec. 27, 2016
Filed:
Jun. 09, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Shingo Kitamura, Fujisawa, JP;
Aiko Kato, Machida, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method includes the stage of partially removing a first insulator layer to form an opening passing through the first insulator layer by plasma etching using a gas of a first type, and the stage of partially removing a second insulator layer to form an opening passing through the second insulator layer by plasma etching using a gas of a second type. The gas of a first type contains a first component capable of etching the first insulator layer, and a gas of the second type contains a second component different from the first component, capable of etching the second insulator layer and a third component having a higher deposition ability than the second component.