Patent ID: 9322799
Filing Date: 2016-04-26
CPC Classification: G01N

Claim Text:
1. A method for fabricating a device structure for detecting partial pressure of oxygen in blood, comprising: forming a multi-layer gate structure on a semiconductor substrate by: forming a porous membrane layer over an entirety of the multi-layer gate structure; forming spacers on opposite sides of the multi-layer gate structure; forming a source region and a drain region within the semiconductor substrate by implanting impurities therein after the spacers have been formed; removing the spacers to expose a perimeter of the high-k layer after the source and drain regions have been formed and to form a receiving area configured to receive blood that has been filtered through the porous membrane layer prior to making contact with the exposed perimeter of the high-k layer; and connecting the multi-layer gate structure to a processor for calculating a partial pressure of oxygen in the filtered blood in the receiving area based on a detected shift in a flatband voltage of the multi-layer gate structure with respect to temperature.