Patent ID: 11881410
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate processing apparatus comprising:
a chamber;
a substrate support disposed in the chamber;
a plasma generator configured to form a plasma in the chamber; and
a controller configured to perform a process including
placing a substrate on the substrate support, the substrate including a first film, a second film and a third film, the first film containing a silicon, the second film having a second aperture, the first film being disposed between the second film and the third film, the third film being an organic film;
cooling the substrate to −30° or less;
etching the first film through the second aperture with a plasma formed from a first process gas containing a fluorocarbon gas, to form a first aperture of a tapered shape in the first film such that a width of the first aperture gradually decreases toward a bottom of the first aperture; and
etching the third film through the first aperture.