Patent ID: 8994077
Filing Date: 2015-03-31
Classification: G01N,H01L

Abstract:
1. An apparatus, comprising: a buried oxide layer formed on a substrate; a sensing fin formed on the buried oxide layer and forming a channel of undoped silicon 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 fin, the sensing surface comprising a dielectric layer and a metal oxide on one or more sides and on a top of the sensing fin; a passive surface over the buried oxide layer and surrounding 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 fin 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 fin 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.