Patent ID: 9441292
Filing Date: 2016-09-13
CPC Classification: B29C,C23C,H01J,H01L,Y10S

Claim Text:
1. A method of dry-etching an etching target film formed on a first substrate, comprising: arranging a ring member on a peripheral portion of a mounting table provided in the processing chamber; loading a second substrate into the processing chamber and mounting the second substrate on the mounting table such that the ring member disposed on the peripheral portion of the mounting table surrounds the second substrate; generating plasma of a first gas on a surface of the second substrate and a surface of the ring member to thereby form, on the surface of the second substrate and the surface of the ring member, a film having a main component identical to that of the etching target film formed on the first substrate; unloading the second substrate from the processing chamber; loading the first substrate into the processing chamber and mounting the first substrate on the mounting table such that the ring member disposed on the peripheral portion of the mounting table surrounds the first substrate; and generating a plasma of a second gas to thereby dry-etch the etching target film formed on the first substrate in a state where the main component of the film formed on the ring member is identical to that of the etching target film formed on the first substrate, wherein the etching target film formed on the first substrate is one of a metal, a metal nitride, and a metal oxide, and the film formed on the ring member is identical to the etching target film.