Forming low k dielectric layers
First Claim
Patent Images
1. A method of forming a low k dielectric layer including:
- (a) depositing an unset dielectric layer on a substrate, the dielectric layer including Silicon, Carbon and Oxygen;
(b) exposing the surface of the dielectric layer to an activated gas to form a semi-permeable skin on or of the surface of the layer; and
(c) curing the layer to render at least part of the layer porous.
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Abstract
A low k dielectric layer is formed by depositing an unset dielectric layer on a substrate, the dielectric layer including Silicon, Carbon and Oxygen. The surface of the dielectric layer exposed to an activated gas to form a semi-permeable skin on or of the surface of the layer. The layer is then cured to render at least part of the layer porous.
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Citations
43 Claims
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1. A method of forming a low k dielectric layer including:
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(a) depositing an unset dielectric layer on a substrate, the dielectric layer including Silicon, Carbon and Oxygen; (b) exposing the surface of the dielectric layer to an activated gas to form a semi-permeable skin on or of the surface of the layer; and (c) curing the layer to render at least part of the layer porous. - View Dependent Claims (2, 3, 4)
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5. A method of forming a low k dielectric layer including:
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(a) depositing an unset dielectric layer on a substrate, the dielectric layer including Silicon, Carbon and Oxygen; (b) at least partially curing a surface zone of the layer; and (c) curing the layer to render the bulk of the layer porous. - View Dependent Claims (6, 7, 8)
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9. A method of forming a low k dielectric layer including:
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a) depositing an unset dielectric layer on a substrate by chemical vapour deposition, the dielectric layer including Silicon, Carbon and Oxygen; b) forming or depositing a semi-permeable skin on or of the surface of the layer; and c) setting the layer whereby at least part of the layer is porous. - View Dependent Claims (10, 11, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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12. A method as claimed in 11 wherein the activated gas is predominately a constituent of the deposition gas mix.
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13. A method as claimed in 11 where the activated gas is a gas of the deposition gas mix.
- 14. A method as claimed in 13 where the gas is continued after the deposition process is terminated by termination of the process gas flow.
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35. A method of forming a low k dielectric layer including:
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a) depositing an unset dielectric layer on a substrate, the dielectric layer including Silicon, Carbon and Oxygen; b) exposing the surface of the dielectric layer to activated Nitrogen; and c) exposing the layer to activated Hydrogen. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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Specification