Invention Grant
- Patent Title: Atomic layer deposition of tungsten materials
- Patent Title (中): 原子层沉积钨材料
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Application No.: US12121209Application Date: 2008-05-15
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Publication No.: US07964505B2Publication Date: 2011-06-21
- Inventor: Amit Khandelwal , Madhu Moorthy , Avgerinog V. Gelatos , Kai Wu
- Applicant: Amit Khandelwal , Madhu Moorthy , Avgerinog V. Gelatos , Kai Wu
- Applicant Address: US CA Santa Clara
- Assignee: Applied Materials, Inc.
- Current Assignee: Applied Materials, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Patterson & Sheridan, L.L.P.
- Main IPC: H01L21/44
- IPC: H01L21/44

Abstract:
Embodiments of the invention provide an improved process for depositing tungsten-containing materials. The process utilizes soak processes and vapor deposition processes, such as atomic layer deposition (ALD) to provide tungsten films having significantly improved surface uniformity and production level throughput. In one embodiment, a method for forming a tungsten-containing material on a substrate is provided which includes positioning a substrate within a process chamber, wherein the substrate contains an underlayer disposed thereon, exposing the substrate sequentially to a tungsten precursor and a reducing gas to deposit a tungsten nucleation layer on the underlayer during an ALD process, wherein the reducing gas contains a hydrogen/hydride flow rate ratio of about 40:1, 100:1, 500:1, 800:1, 1,000:1, or greater, and depositing a tungsten bulk layer on the tungsten nucleation layer. The reducing gas contains a hydride compound, such as diborane, silane, or disilane.
Public/Granted literature
- US20090053893A1 ATOMIC LAYER DEPOSITION OF TUNGSTEN MATERIALS Public/Granted day:2009-02-26
Information query
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