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

Contact elements of a semiconductor device formed by electroless plating and excess material removal with reduced sheer forces
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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