Abstract:
A method for manufacturing a power semiconductor device, which comprises a first electrical contact (2) on a first main side (21) and a second electrical contact (3) on a second main side (31) opposite the first main side (21) and at least a two-layer structure with layers of different conductivity types, comprises at least the following manufacturing steps: an n doped wafer (1) is provided, a surface layer (4, 4', 4", 4'") of palladium particles is created on the first main side (21), the wafer (1) is irradiated (5) on the first main side (21) with ions, afterwards the palladium particles are diffused (41) into the wafer at a temperature of not more than 750 °C, by which diffusion a first p doped layer (7) is created, afterwards the first and second electrical contacts (2, 3) are created, characterized in that at least the step of the irradiation (5) with ions is performed through a mask (45).
Abstract:
A power semiconductor device is provided comprising a wafer, wherein a passivation layer structure is formed at least on a portion of a surface of the wafer and the passivation layer structure comprises in an order from the surface of the wafer in a direction away from the wafer a semi-insulating layer (13), a silicon nitride layer, an undoped silicate glass layer (16) and an organic dielectric layer (17). The silicon nitride layer has a layer thickness of at least 0.5 µm. The organic dielectric layer (17) is attached to the undoped silicate glass layer (16) and the undoped silicate glass layer (16) is attached to the silicon nitride layer.
Abstract:
A wide bandgap semiconductor device is provided comprising an (n-) doped drift layer between a first main side (20) and a second main side (22). On the first main side (20), two n doped source regions (3, 3') which are laterally surrounded by p doped channel layers (4, 4') having a channel layer depth (40). A p+ doped well layer (5) having a well layer depth (50), which is at least as large as the channel layer depth (40) is arranged at the bottom of the source regions 3, 3'. A p++ doped plug (6) having a plug depth (60), which is as least as great as the well layer depth (50), and having a higher doping concentration than the well layer (5), is arranged between the two source regions (3, 3'). On the first side (12), a first main electrode (9) contacts as an ohmic contact at least the two source regions (3, 3') and the plug (6).
Abstract:
An insulated gate bipolar is produced, wherein the following steps are performed: (a) providing a lowly n doped substrate (1) having an emitter side (20) and a collector side (27), (b) forming n and p doped layers on the emitter side (20), (c) thinning the substrate (1) on the collector side (27), (d) implanting an n first dopant (82) on the collector side (27) into a depth of at most 2 µm, (e) forming a first buffer layer (8) by annealing the first dopant (82), (f) applying a surface layer comprising an n second dopant on top of the collector side (27), (g) forming a second buffer layer (9) by annealing the second dopant, wherein the second buffer layer (9) having a lower maximum doping concentration than the first buffer layer (8), (h) applying a p third dopant at the collector side (27), (i) forming a collector layer (6) by annealing the third dopant.
Abstract:
A power device (10) comprises at least one power semiconductor module (12) comprising a wide bandgap semiconductor element (18); and a cooling system (16) for actively cooling the wide bandgap semiconductor element (18) with a cooling medium, wherein the cooling system (16) comprises a refrigeration device (40) for lowering a temperature of the cooling medium below an ambient temperature of the power device (10); wherein the cooling system (16) is adapted for lowering the temperature of the cooling medium in such a way that a temperature of the wide bandgap semiconductor (18) element is below 100° C.
Abstract:
An insulated gate semiconductor device comprising a semiconductor substrate (1) having a top surface and an insulated gate (21,22) formed on the top surface from a layered structure (2) that comprises at least one electrically insulating layer (22), wherein at least one strip (41,42) of the layered structure (2) is disposed on an area of the top surface between an edge of the insulated gate (21,22) and a first main contact (6). A manufacturing method for an insulated gate semiconductor device comprising the steps of forming a cell window (3) in said layered structure (2), forming at least one process mask (51) that partially covers the cell window (3) and extends to at least partially cover said at least one strip (41,42) of the layered structure, said at least one strip (41,42) serving as an edge for the at least one process mask (51).