Patent ID: 11942440
Assignee: STMICROELECTRONICS (ROUSSET) SAS
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. An integrated circuit, comprising:
a semiconductor substrate having a rear face;
a first semiconductor well in the semiconductor substrate;
a second semiconductor well in the semiconductor substrate, the second semiconductor well insulated from the first semiconductor well and from a rest of the semiconductor substrate;
wherein the second semiconductor well includes a PN junction;
a detecting device configured to operate to detect a Differential Fault Analysis (DFA) attack initiated by application of a laser radiation to the semiconductor substrate through detection of a photocurrent flowing in the second semiconductor well, wherein said photocurrent is generate by said PN junction in response to the laser radiation; and
circuit components in the first semiconductor well;
wherein the circuit components are memory circuits.