Abstract:
An electronic power device (2) for controlling a load (3), comprising: a high-voltage integrated switch (8) having an output terminal to be connected to said load; integrated, and low-voltage driving means (9) for driving the switch (8), a start-up integrated circuit (10) comprising a high-voltage resistor (15) that can be enabled, during a step of turning on said power device (2), in order to activate the driving means. Said device is characterized in that the switch (8) and the start-up circuit (10) are integrated in a first semiconductor chip and the driving means (9) is integrated in a different, second semiconductor chip.
Abstract:
The MOS-type power device (1) has a drain terminal (4), a source terminal (3), and a gate terminal (2), and comprises a protection circuit (11) having a first conduction terminal connected to the gate terminal (2), via a diffused resistor (5), and a second conduction terminal connected to the source terminal (3). The protection circuit (11) has a resistance variable between a first value and a second value according to the operating condition of the power device (1). A first embodiment of the protection circuit (11) comprises an ON-OFF switch (12) made by means of a horizontal MOS transistor which has a control terminal connected to the drain terminal (4) of the power device (1). A second embodiment of the protection circuit (11) envisages the replacement of the ON-OFF switch (12) with a gradual-intervention switch (23) made by means of a P-channel JFET transistor having a control terminal connected to the gate terminal (2) of the power device (1).
Abstract:
Process for manufacturing a multi-drain power electronic device (30) integrated on a semiconductor substrate (100) of a first type of conductivity, characterised in that it comprises the following steps: - forming a first semiconductor layer (21) of the first type of conductivity and of a first resistivity (ρ 1 ) value and a first thickness (X1) on the semiconductor substrate (100), - forming at least a second semiconductor layer (23) of a second type of conductivity and of a second resistivity (ρ 2 ) value and a second thickness (X2) on the first semiconductor layer (21), - forming, in this at least a second semiconductor layer (23), a first plurality of implanted regions (D3) of the first type of conductivity by means of a first selective implant step with a first implant dose (Φ 3 ), - forming implanted body regions (40) of the second type of conductivity in portions of said second semiconductor layer (23) free from said first plurality of implanted regions (D3), - carrying out a thermal diffusion process so that the first plurality of implanted regions (D3) form a first plurality of electrically continuous implanted column regions (D) of the first type of conductivity along this at least a second semiconductor layer (23) and in electric contact with the first semiconductor layer (21), the first plurality of column implanted regions (D) delimiting a second plurality of column regions (50) of the second type of conductivity, said implanted body regions (40) resulting to be formed in said second plurality of column regions (50).