Method for fabricating semiconductor device
First Claim
Patent Images
1. A method for fabricating a semiconductor device, comprising:
- loading a wafer into a chamber including vertical sidewalls and a curved ceramic dome coated with a material having etch tolerance against a plasma, wherein the material is yttrium oxide;
etching a gate structure formed on the wafer, thereby generating etch remnants;
and removing the etch remnants by;
using a gas of SF6 as a main etch gas, andwherein the vertical sidewalls and the curved ceramic dome are uniformly cleaned using a multi-step cleaning process including a plurality of steps in which the removing of the etch remnants on the curved ceramic dome is performed at pressures lower than that on the vertical sidewalls,wherein the removing of the etch remnants is performed under a source power of approximately 1,600 W supplied to an antenna coil and different pressures ranging from approximately 3 mTorr to approximately 90 mTorr,wherein the vertical sidewalls are cleaned from positions progressing along the vertical sidewalls in multiple steps, and wherein the chamber pressure is reduced in each of the multiple steps.
5 Assignments
0 Petitions
Accused Products
Abstract
A method for fabricating a semiconductor device is provided. The method includes: loading a wafer into a chamber including a ceramic dome coated with a material having etch tolerance against a plasma; etching a gate structure formed on the wafer, thereby generating etch remnants; and removing the etch remnants by using a gas of SF6 as a main etch gas.
9 Citations
7 Claims
-
1. A method for fabricating a semiconductor device, comprising:
-
loading a wafer into a chamber including vertical sidewalls and a curved ceramic dome coated with a material having etch tolerance against a plasma, wherein the material is yttrium oxide; etching a gate structure formed on the wafer, thereby generating etch remnants; and removing the etch remnants by; using a gas of SF6 as a main etch gas, and wherein the vertical sidewalls and the curved ceramic dome are uniformly cleaned using a multi-step cleaning process including a plurality of steps in which the removing of the etch remnants on the curved ceramic dome is performed at pressures lower than that on the vertical sidewalls, wherein the removing of the etch remnants is performed under a source power of approximately 1,600 W supplied to an antenna coil and different pressures ranging from approximately 3 mTorr to approximately 90 mTorr, wherein the vertical sidewalls are cleaned from positions progressing along the vertical sidewalls in multiple steps, and wherein the chamber pressure is reduced in each of the multiple steps. - View Dependent Claims (2, 3)
-
-
4. A method for fabricating a semiconductor device, comprising:
-
loading a wafer into a chamber including vertical sidewalls and a curved ceramic dome coated with a material having etch tolerance against a plasma, wherein the material is yttrium oxide or diyttrium trioxide; etching a gate structure formed on the wafer, thereby generating etch remnants; and
removing the etch remnants by;using a gas of SF6 as a main etch gas, and performing a recovery process, wherein the vertical sidewalls and the curved ceramic dome are uniformly cleaned using a multi-step cleaning process including a plurality of steps in which the removing of the etch remnants on the curved ceramic dome is performed at pressures lower than that on the vertical sidewalls, wherein the removing of the etch remnants is performed under a source power of approximately 1,600 W supplied to an antenna coil and different pressures ranging from approximately 3 mTorr to approximately 90 mTorr, wherein the sidewalls are cleaned from positions progressing along the vertical sidewalls in multiple steps, and wherein the chamber pressure is reduced in each of the multiple steps. - View Dependent Claims (5, 6, 7)
-
Specification