Patent ID: 9110014
Filing Date: 2015-08-18
Classification: G01N,H01L

Abstract:
1. An apparatus, comprising: a buried oxide layer formed on a substrate; a sensing element comprising silicon nanowire formed on the buried oxide layer and forming a channel for providing a current flow between a source region and a drain region, each of the source region and the drain region comprising heavily doped silicon; a sensing surface on the sensing element, the sensing surface comprising a dielectric layer and a metal oxide on the sensing element; a passive surface over the buried oxide layer and adjacent to the sensing surface, the passive surface being of a material that is dissimilar to a material of the sensing surface; and a compound bound to the sensing surface on the sensing element and not bound to the passive surface, the compound having a ligand specifically configured to preferentially bind a target biomolecule to be sensed on the sensing element where the binding of the target biomolecule is capable of causing a change in the current flow between the source region and the drain region to sense the target biomolecule on the sensing surface; wherein at least a top surface of the sensing element extends above a top surface of the passive surface.