Patent ID: 8841622

Claim:
A direct ion storage (DIS) radiation dosimeter, comprising: a first layer having a MOSFET structure formed thereon by semiconductor processing techniques, the MOSFET structure having a floating gate with an exposed surface; a second layer having a concavity therein; a third layer, optionally having a concavity therein; the first layer being sandwiched between the second and third layer, the three layers being bonded together to form a hermetic seal; wherein the concavity in the second layer, and any concavity in the third layer, are aligned with the exposed surface of the floating gate to form an ion chamber; wherein the first layer has more than one MOSFET structure formed thereon, the second layer has a corresponding number of concavities, and the third layer optionally has a corresponding number of concavities, to form an ion chamber over each MOSFET structure; and wherein each ion chamber is filled with: a different gas; or a gas having different pressure.