Patent ID: 11961933
Assignee: STMICROELECTRONICS S.R.L.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A sensing system, comprising:
an array of photodiodes integrated in a semiconductor die, each of the photodiodes of the array of photodiodes including:
a semiconductive structure;
a front epitaxial layer on the semiconductive structure, the front epitaxial layer having a first conductivity type; and
an anode region extending into the front epitaxial layer, the anode region having a second conductivity type that is different from the first conductivity type;
a plurality of gettering regions in the semiconductive structure;
a first dielectric layer on a semiconductor body, the first dielectric layer defining a recess that exposes the anode region; and
a second dielectric layer on the semiconductor body and on the first dielectric layer, the second dielectric layer extending into the recess;

a light source optically coupled to the array of photodiodes, the light source configured to illuminate the array of photodiodes; and
microcontroller circuitry electrically coupled to the array of photodiodes, the microcontroller circuitry configured to receive an output signal of the array, a display coupled to the microcontroller circuitry and configured to display information associated with an output of the microcontroller circuitry, the microcontroller circuitry including an analog-to-digital converter and a microcontroller coupled between the analog-to-digital converter and the display.