Ion sensitive detector
First Claim
1. An ISFET detector for determining concentration of target ions in a fluid, the ISFET detector comprising:
- a transistor comprising;
a semiconductor substrate comprising a source and a drain having source and drain electrodes respectively and a channel region between them in the semiconductor substrate;
an insulating material overlying the channel region; and
a gate electrode formed on the insulating material;
a reference electrode electrifiable to establish an electric field in the channel region;
a conducting layer comprising an electrically conducting material;
an accumulator layer formed on the conducting layer, the accumulator layer comprising a layer of material of thickness less than or equal to about 2 nm (nanometers) that accumulates target ions responsive to a concentration of the target ions in the fluid; and
a conducting element comprising a switch selectively operable to electrically connect the conducting layer to, or disconnect the conducting layer from, the gate electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
An ISFET detector for determining concentration of a target ion in a fluid, the apparatus comprising: a semiconducting substrate comprising a source and a drain having source and drain electrodes respectively and a channel region between them in the substrate; an insulating material overlying the channel region; a gate electrode formed on the insulating material; a reference electrode electrifiable to establish an electric field in the channel region; an accumulator comprising a layer of material of thickness less than or equal to about 2 nm (nanometers) that accumulates a quantity of target ions responsive to concentration of the target ions in the fluid; a layer of a conducting material on which the accumulator is formed that is separate from the gate electrode; and a conducting element that electrically connects the layer of conducting material to the gate electrode.
16 Citations
10 Claims
-
1. An ISFET detector for determining concentration of target ions in a fluid, the ISFET detector comprising:
-
a transistor comprising; a semiconductor substrate comprising a source and a drain having source and drain electrodes respectively and a channel region between them in the semiconductor substrate; an insulating material overlying the channel region; and a gate electrode formed on the insulating material; a reference electrode electrifiable to establish an electric field in the channel region; a conducting layer comprising an electrically conducting material; an accumulator layer formed on the conducting layer, the accumulator layer comprising a layer of material of thickness less than or equal to about 2 nm (nanometers) that accumulates target ions responsive to a concentration of the target ions in the fluid; and a conducting element comprising a switch selectively operable to electrically connect the conducting layer to, or disconnect the conducting layer from, the gate electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification