Method of forming a carbon nanotube-based contact to semiconductor
First Claim
1. A method of making a conductive article on a semiconductor comprising:
- providing a semiconductor;
forming on the semiconductor a conductive trace including a nonwoven nanotube fabric layer and a thin metal layer;
depositing a mask layer over the conductive trace;
defining a pattern in the mask layer, the pattern corresponding to the shape of the article; and
removing portions of the nanotube fabric layer and portions of the metal layer in accordance with the pattern of the mask layer so that the remaining conductive trace forms the conductive article and the semiconductor is substantially preserved.
4 Assignments
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Accused Products
Abstract
Manufacturers encounter limitations in forming low resistance ohmic electrical contact to semiconductor material P-type Gallium Nitride (p-GaN), commonly used in photonic applications, such that the contact is highly transparent to the light emission of the device. Carbon nanotubes (CNTs) can address this problem due to their combined metallic and semiconducting characteristics in conjunction with the fact that a fabric of CNTs has high optical transparency. The physical structure of the contact scheme is broken down into three components, a) the GaN, b) an interface material and c) the metallic conductor. The role of the interface material is to make suitable contact to both the GaN and the metal so that the GaN, in turn, will make good electrical contact to the metallic conductor that interfaces the device to external circuitry. A method of fabricating contact to GaN using CNTs and metal while maintaining protection of the GaN surface is provided.
67 Citations
12 Claims
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1. A method of making a conductive article on a semiconductor comprising:
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providing a semiconductor; forming on the semiconductor a conductive trace including a nonwoven nanotube fabric layer and a thin metal layer; depositing a mask layer over the conductive trace; defining a pattern in the mask layer, the pattern corresponding to the shape of the article; and removing portions of the nanotube fabric layer and portions of the metal layer in accordance with the pattern of the mask layer so that the remaining conductive trace forms the conductive article and the semiconductor is substantially preserved. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification