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:
May. 22, 2001
Filed:
Jan. 13, 1998
Takeshi Nogami, Sunnyvale, CA (US);
Guarionex Morales, Santa Clara, CA (US);
Minh Van Ngo, Union City, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
In a preferred embodiment, there is disclosed a method of forming a tungsten plug at the via level. A metal line is formed in a top portion of a first insulating layer. A second insulating layer is formed on the first insulating layer and over an exposed surface of the metal line. An etching process is applied to a region of the second insulating layer formed over the exposed surface of the metal line to create a contact hole within the region. The metal line is exposed at the region. A tungsten nitride thin film is deposited over the second insulating layer and the exposed metal line. A blanket tungsten thin film is deposited to fill the contact hole and to form a planar layer successively to the depositing of the tungsten nitride thin film. The tungsten nitride thin film and the blanket tungsten thin film are chemically mechanically polished until the upper surface of the second insulating layer is exposed.