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US08210904B2 Slurryless mechanical planarization for substrate reclamation 有权
无衬底机械平面化用于衬底回收

Slurryless mechanical planarization for substrate reclamation
Abstract:
A patterned portion of a patterned semiconductor substrate is removed by abrasive mechanical planarization employing an abrasive pad but without employing any slurry. Preferably, water is supplied to enhance the removal rate during the mechanical planarization. The removal rate of material is substantially independent for common materials employed in back-end-of-line (BEOL) semiconductor materials, which enables non-selective removal of the material containing metallization structures. The removal rate of silicon is lower than the removal rate for the BEOL semiconductor materials, enabling a self-stopping planarization process.
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