Patent ID: 8029873
Filing Date: 2011-10-04
Classification: C23C,H01J,H01L

Abstract:
1. A film deposition method of a metal film comprising the steps of: preparing an object to be processed having a recess formed in a surface thereof and having a wiring layer at a bottom part of the recess; forming a base layer on a surface of the object to be processed including a surface in the recess; ionizing a metal target in an evacuated processing vessel to generate metal particles including metal ions, by means of a plasma formed by making plasma an inert gas; and by applying a bias electric power to the object to be processed placed on a stage in the processing vessel to draw the plasma and the metal particles into the object to be processed, scraping the base layer and the wiring layer at the bottom part of the recess to form a scraped recess, and depositing a metal film on an entire surface of the object to be processed including the surface in the recess, wherein the step of scraping the base layer and the wiring layer and depositing the metal film includes: a first film deposition step in which conditions are set in such a manner that a film deposition amount of the metal film on the surface of the object to be processed excluding the recess is substantially equal to an etching amount by the plasma of the inert gas, so that the metal is not formed on the surface of the object to be processed and a scraped recess is formed on the base layer; and a second film deposition step in which conditions are set in such a manner that a film deposition amount of the metal film on the surface of the object to be processed excluding the recess is slightly larger than an etching amount by the plasma of the inert gas, so that a predetermined metal film is formed on the surface of the object to be processed excluding the recess and a concave shape of the scraped recess is further enlarged.