Patent ID: 9035362
Filing Date: 2015-05-19
Classification: G01N

Abstract:
1. A sensor for sensing the presence of at least one fluidum in a space adjoining the sensor, comprising: a plurality of laterally arranged two-dimensional electron gas (2DEG) layer stacks; a gate electrode overlaying at least part of each of the 2DEG layer stacks and configured to electrostatically control electron densities of a 2DEG in each of the 2DEG layer stacks; a plurality of pairs of source and drain electrodes, wherein a source electrode and a drain electrode of each pair contact one of the 2DEG layer stacks and are laterally interposed in a first lateral direction by a contact surface; and a detection opening vertically interposed between the gate electrode and the 2DEG layer stacks to form a cavity laterally extending in a second lateral direction crossing the first lateral direction to at least partially overlap the gate electrode, wherein the detection opening is at least partly filled with a porous material and configured to communicate with the space through a detection opening inlet by allowing molecules of the fluidum to move from the adjoining space through the detection opening inlet into the detection opening to measurably alter an electric characteristic of the 2DEG in each of the 2DEG layer stacks.