Method of forming a wiring having carbon nanotube
First Claim
1. A method of forming a wiring having a carbon nanotube, comprising:
- forming a lower wiring on a substrate;
forming a catalyst layer on the lower wiring;
forming an insulating interlayer on the substrate to cover the catalyst layer;
forming an opening through the insulating interlayer to expose an upper face of the catalyst layer;
forming a carbon nanotube wiring in the opening;
forming an upper wiring on the carbon nanotube wiring and the insulating interlayer, the upper wiring being electrically connected to the carbon nanotube wiring; and
generating a thermal stress between the carbon nanotube wiring and the upper wiring to produce a dielectric breakdown of a native oxide layer formed on a surface of the carbon nanotube wiring.
1 Assignment
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Accused Products
Abstract
In a method of forming a wiring having a carbon nanotube, a lower wiring is formed on a substrate, and a catalyst layer is formed on the lower wiring. An insulating interlayer is formed on the substrate to cover the catalyst layer, and an opening is formed through the insulating interlayer to expose an upper face of the catalyst layer. A carbon nanotube wiring is formed in the opening, and an upper wiring is formed on the carbon nanotube wiring and the insulating interlayer to be electrically connected to the carbon nanotube wiring. A thermal stress is generated between the carbon nanotube wiring and the upper wiring to produce a dielectric breakdown of a native oxide layer formed on a surface of the carbon nanotube wiring. A wiring having a reduced electrical resistance between the carbon nanotube wiring and the upper wiring may be obtained.
12 Citations
13 Claims
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1. A method of forming a wiring having a carbon nanotube, comprising:
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forming a lower wiring on a substrate; forming a catalyst layer on the lower wiring; forming an insulating interlayer on the substrate to cover the catalyst layer; forming an opening through the insulating interlayer to expose an upper face of the catalyst layer; forming a carbon nanotube wiring in the opening; forming an upper wiring on the carbon nanotube wiring and the insulating interlayer, the upper wiring being electrically connected to the carbon nanotube wiring; and generating a thermal stress between the carbon nanotube wiring and the upper wiring to produce a dielectric breakdown of a native oxide layer formed on a surface of the carbon nanotube wiring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming a wiring having a carbon nanotube, comprising:
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forming a lower wiring on a substrate; forming a catalyst layer on the lower wiring; forming an insulating interlayer having an opening on the catalyst layer and the substrate, the opening exposing the catalyst layer; growing a carbon nanotube from the catalyst layer toward an entrance of the opening; forming a capping layer on the insulating interlayer to fill the opening in which the carbon nanotube is formed; partially removing the capping layer and the carbon nanotube to form a carbon nanotube wiring by performing a chemical mechanical polishing (CMP) process until upper faces of the insulating interlayer and the carbon nanotube are exposed; removing a native oxide layer from an upper surface of the carbon nanotube wiring and partially removing the insulating interlayer such that an upper portion of the carbon nanotube wiring is protruded from the insulating interlayer, the native oxide layer being formed on the carbon nanotube wiring while performing the CMP process; and forming an upper wiring on the carbon nanotube wiring and the insulating interlayer, the upper wiring being electrically connected to the carbon nanotube wiring. - View Dependent Claims (10, 11, 12, 13)
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Specification