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

Claim 0:
1. A semiconductor device, comprising:
an array of chemically-sensitive field effect transistor (chemFET) sensors; each chemFET sensor including a floating gate conductor having an upper surface, 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 and comprising an opening to a reaction region bounded by sidewalls; and
a sensing layer formed over the upper surface of the floating gate conductor, the sensing layer forming a bottom of each microwell of the array of microwells, wherein the sensing layer has a pH sensitivity of between about 40 mV/pH to about 60 mV/pH.