Patent ID: 9297780
Filing Date: 2016-03-29
CPC Classification: G01N

Claim Text:
1. A device structure for detecting partial pressure of oxygen in blood, comprising: a semiconductor substrate including a source region and a drain region; a multi-layer gate structure formed on the semiconductor substrate, the multi-layer gate structure comprising: an oxide layer formed over the semiconductor substrate; a high-k layer formed over the oxide layer; a metal gate layer formed over the high-k layer; and a polysilicon layer formed over the metal gate layer; a porous membrane layer formed over an entirety of the multi-layer gate structure; a receiving area for holding a blood sample in contact with a cross-section of the multi-layer gate structure such that the blood sample is filtered through the porous membrane prior to making contact with the cross-section of the multi-gate structure and such that the high-k layer is exposed to contact the blood sample in the receiving area; a processor for calculating a partial pressure of oxygen in the blood sample based on a detected shift in a flatband voltage of the multi-layer gate structure with respect to temperature; and wherein the porous membrane layer is configured to pass oxygenated blood therethrough such that the oxygenated blood makes contact with high-k layer and oxygen of the oxygenated blood fills vacancies within the high-k layer to shift the flatband voltage while platelets are prevented from making contact with the high-k layer.