Patent ID: 11921112
Assignee: PARAGRAF USA INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 13:
14. A method for forming a biosensor integrated circuit (“IC”) chip, the method comprising:
depositing a dielectric oxide layer on a wafer;
disposing a two-dimensional (“2D”) nanomaterial layer on the dielectric oxide layer to form a 2D channel for a liquid gated field effect transistor in an array of liquid gated field effect transistors;
depositing an etch stop layer over the 2D nanomaterial layer;
depositing a passivation layer over the etch stop layer;
etching one or more openings through the passivation layer and the etch stop layer to expose a top side or an edge of the 2D nanomaterial;
depositing a metal layer comprising electrode material in the one or more openings to form:
a drain electrode that forms an edge contact and/or a top contact at a first end of the 2D channel; and
a source electrode that forms an edge contact and/or a top contact at a second end of the 2D channel;

wherein a liquid gate for the field effect transistor is formed above a top surface of the 2D channel upon receiving the liquid.