SELECTIVE SILICON DIOXIDE DEPOSITION USING PHOSPHONIC ACID SELF ASSEMBLED MONOLAYERS AS NUCLEATION INHIBITOR
First Claim
1. A method of forming a patterned layer on a patterned substrate, the method comprising:
- selectively forming a patterned layer on the patterned substrate, wherein a deposition rate of the patterned layer on an exposed dielectric portion of the patterned substrate is at least one hundred times greater than a deposition rate of the patterned layer on an exposed metal portion of the patterned substrate, wherein the patterned layer is patterned after formation and without application of photolithography.
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Abstract
Methods of selectively depositing a patterned layer on exposed dielectric material but not on exposed metal surfaces are described. A self-assembled monolayer (SAM) is deposited using phosphonic acids. Molecules of the self-assembled monolayer include a head moiety and a tail moiety, the head moiety forming a bond with the exposed metal portion and the tail moiety extending away from the patterned substrate and reducing the deposition rate of the patterned layer above the exposed metal portion relative to the deposition rate of the patterned layer above the exposed dielectric portion. A dielectric layer is subsequently deposited by atomic layer deposition (ALD) which cannot initiate in regions covered with the SAM in embodiments.
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Citations
21 Claims
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1. A method of forming a patterned layer on a patterned substrate, the method comprising:
selectively forming a patterned layer on the patterned substrate, wherein a deposition rate of the patterned layer on an exposed dielectric portion of the patterned substrate is at least one hundred times greater than a deposition rate of the patterned layer on an exposed metal portion of the patterned substrate, wherein the patterned layer is patterned after formation and without application of photolithography. - View Dependent Claims (2, 3, 4)
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5. A method of forming a patterned layer on a patterned substrate, the method comprising:
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providing a patterned substrate having an exposed dielectric portion and an exposed metal portion, wherein the exposed metal portion is electrically conducting; exposing the patterned substrate to phosphonic acid; forming a self-assembled monolayer on the exposed metal portion but not on the exposed dielectric portion; placing the patterned substrate in a substrate processing region; forming the patterned layer by; (1) flowing a first precursor into the substrate processing region, (2) removing unused portions of the first precursor from the substrate processing region (3) flowing a second precursor into the substrate processing region, and (4) removing unused portions of the second precursor from the substrate processing region; and repeating (1)-(4) an integral number of times to form a thickness of patterned layer. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method of forming a patterned layer on a patterned substrate, the method comprising:
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forming a patterned dielectric layer on the patterned substrate, wherein the patterned dielectric layer has a gap; forming an electrically conducting layer in the gap of the patterned dielectric layer; chemical mechanical polishing the electrically conducting layer to remove metal disposed above the gap resulting in an exposed dielectric portion and an exposed metal portion; exposing the patterned substrate to phosphonic acid; forming a self-assembled monolayer on the exposed metal portion but not on the exposed dielectric portion; placing the patterned substrate in a substrate processing region; and forming the patterned layer by repeated alternating exposure to a first precursor and a second precursor, wherein a deposition rate of the patterned layer above the exposed dielectric portion is at least one hundred times greater than a deposition rate of the patterned layer above the exposed metal portion, and wherein the substrate processing region is plasma-free during the repeated alternating exposure. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification