Patent ID: 11874250
Assignee: LIFE TECHNOLOGIES CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  C  H | IPC C  G  H

Claim 12:
13. An apparatus comprising:
a semiconductor device comprising:
an array of chemically-sensitive field effect transistor (chemFET) sensors, wherein the array of chemFET sensors comprises between 10{circumflex over ( )}5 to 10{circumflex over ( )}9 sensors;
an array of microwells formed over the array of chemFET sensors; each microwell in the array of microwells capacitively coupled to at least one chemFET sensor in the array of chemFET sensors; each microwell in the array of microwells comprising an opening to a reaction region; and
a sensing layer formed over an upper surface of a floating gate conductor of each chemFET sensor in the array of chemFET sensors, wherein the sensing layer has a pH sensitivity of between about 40 mV/pH to about 60 mV/pH;

a reference electrode providing a stable reference voltage to the array of chemFET sensors; and
a field programmable gate array to acquire output signals for the array of chemFET sensors.