Invention Grant
US08450197B2 Contact elements of a semiconductor device formed by electroless plating and excess material removal with reduced sheer forces
有权
通过无电镀形成的半导体器件的接触元件和减少的剪切力除去多余的材料
- Patent Title: Contact elements of a semiconductor device formed by electroless plating and excess material removal with reduced sheer forces
- Patent Title (中): 通过无电镀形成的半导体器件的接触元件和减少的剪切力除去多余的材料
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Application No.: US12962968Application Date: 2010-12-08
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Publication No.: US08450197B2Publication Date: 2013-05-28
- Inventor: Axel Preusse , Norbert Schroeder , Uwe Stoeckgen
- Applicant: Axel Preusse , Norbert Schroeder , Uwe Stoeckgen
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee: GLOBALFOUNDRIES Inc.
- Current Assignee Address: KY Grand Cayman
- Agency: Williams, Morgan & Amerson, P.C.
- Priority: DE102010003556 20100331
- Main IPC: H01L21/20
- IPC: H01L21/20 ; H01L21/4763 ; H01L21/44

Abstract:
Contact elements in the contact level of a semiconductor device may be formed on the basis of a selective deposition technique, such as electroless plating, wherein an efficient planarization of the contact level is achieved without subjecting the contact elements to undue mechanical stress. In some illustrative embodiments, an overfilling of the contact openings may be reliably avoided and the planarization of the surface topography is accomplished on the basis of a non-critical polishing process. In other cases, electrochemical etch techniques are applied in combination with a conductive sacrificial current distribution layer in order to remove any excess material of the contact elements without inducing undue mechanical stress.
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