INCREASING MASKING LAYER ETCH RATE AND SELECTIVITY
First Claim
1. A system for increasing etch rate and etch selectivity of a masking layer on a substrate, the system comprising:
- a plurality of substrates containing the masking layer and a layer of silicon or silicon oxide;
an etch processing chamber configured to process the plurality of substrates, the etch processing chamber containing a treatment liquid for etching the masking layer in the plurality of substrates; and
a boiling apparatus coupled to the processing chamber and configured to generate a supply of steam water vapor mixture at elevated pressure;
wherein the steam water vapor mixture is introduced into the etch processing chamber at a flow rate sufficient to maintain a selected target etch rate and a selected target etch selectivity ratio of the masking layer to silicon or silicon oxide.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a method and system for increasing etch rate and etch selectivity of a masking layer on a substrate, wherein the system comprises a plurality of substrates containing the masking layer and a layer of silicon or silicon oxide, an etch processing chamber configured to process the plurality of substrates, the processing chamber containing a treatment liquid for etching the masking layer, and a boiling apparatus coupled to the processing chamber and configured to generate a supply of steam water vapor mixture at elevated pressure, wherein the steam water vapor mixture is introduced into the processing chamber at a controlled rate to maintain a selected target etch rate and a target etch selectivity ratio of the masking layer to silicon or silicon oxide.
-
Citations
24 Claims
-
1. A system for increasing etch rate and etch selectivity of a masking layer on a substrate, the system comprising:
-
a plurality of substrates containing the masking layer and a layer of silicon or silicon oxide; an etch processing chamber configured to process the plurality of substrates, the etch processing chamber containing a treatment liquid for etching the masking layer in the plurality of substrates; and a boiling apparatus coupled to the processing chamber and configured to generate a supply of steam water vapor mixture at elevated pressure; wherein the steam water vapor mixture is introduced into the etch processing chamber at a flow rate sufficient to maintain a selected target etch rate and a selected target etch selectivity ratio of the masking layer to silicon or silicon oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of increasing etch rate and etch selectivity of a masking layer on a substrate, the method comprising:
-
fabricating a plurality of substrates containing the masking layer and a layer of silicon or silicon oxide; obtaining a supply of steam water vapor mixture at an elevated pressure; obtaining a supply of a treatment liquid for selectively etching the masking layer over the silicon or silicon oxide at a set etch rate and a set etch selectivity ratio; placing the plurality of substrates into an etch processing chamber; combining the treatment liquid and the steam water vapor mixture; and injecting the combined treatment liquid and the steam water vapor mixture into the etch processing chamber; wherein a flow of the combined treatment liquid and the steam water vapor mixture is configured to maintain the set etch rate and the set etch selectivity ratio of the masking layer to silicon or silicon oxide. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of increasing etch rate and selectivity of etching silicon nitride on a substrate, the method comprising:
-
placing a plurality of substrates containing a masking layer of silicon nitride and a layer of silicon or silicon oxide into an etch processing chamber; combining a treatment liquid and a steam water vapor mixture under elevated pressure; and injecting the combined treatment liquid and the steam water vapor mixture into the etch processing chamber; wherein a flow of the combined treatment liquid and the steam water vapor mixture are controlled to maintain a target etch rate of the silicon nitride and a target etch selectivity ratio of the silicon nitride to silicon or silicon oxide. - View Dependent Claims (23, 24)
-
Specification