Monolithic active pixel dosimeter

A monolithic active pixel dosimeter, comprising at least a sensing cell, having at least a junction sensing element, said junction sensing element comprising:

• a sensing region, having a first type of conductivity;
• and
• a charge collecting region, contiguous to said sensing region and having a second type of conductivity;
• characterized in that said sensing cell comprises:
• an ohmic region, arranged on and in contact with said charge collecting region, at least overlapping said charge collecting region and extending laterally outside said charge collecting region;
• and
• an insulating annular region, abutting said ohmic region so as to form an insulating junction surrounding said ohmic region and said charge collecting region;
• further characterized in that said sensing cell comprises at least one pixel detector;
• further characterized by comprising a plurality of said sensing cells arranged in at least a first array and in a second array, interleaved with said first array;
• and
• further characterized by comprising a reading circuit and an addressing circuit, for alternatively connecting said sensing cells of said first array and said sensing cells of said second array to said reading circuit.

An active pixel array, comprising:

• at least a sensing cell, having at least a junction sensing element, said junction sensing element including:
• a sensing region, having a first type of conductivity;
• and
• a charge collecting region, contiguous to said sensing region and having a second type of conductivity;
• characterized in that said sensing cell comprises:
• an ohmic region, arranged on and in contact with said charge collecting region, at least partially overlapping said charge collecting region and extending laterally outside said charge collecting region;
• and
• an insulating annular region, abutting said ohmic region so as to form an insulating junction surrounding said ohmic region and said charge collecting region.