Abstract:
A process for manufacturing a semiconductor device (10; 10') envisages the steps of: providing a semiconductor material body (2) having at least one deep trench (4) that extends through said body of semiconductor material starting from a top surface (2a) thereof; and filling the deep trench (4) via an epitaxial growth of semiconductor material, thereby forming a columnar structure (8) within the body of semiconductor material (2). The manufacturing process further envisages the step of modulating the epitaxial growth by means of a concurrent chemical etching of the semiconductor material that is undergoing epitaxial growth so as to obtain a compact filling free from voids of the deep trench (4); in particular, a flow of etching gas is introduced into the same reaction environment as that of the epitaxial growth, wherein a flow of source gas is supplied for the same epitaxial growth.
Abstract:
Power electronic device (30) integrated on a semiconductor substrate (100) of a first type of conductivity comprising a plurality of elemental units, each elemental unit comprising: a body region (40) of a second type of conductivity realised on a semiconductor layer (20) of the first type of conductivity formed on the semiconductor substrate (100), a column region (50) of the first type of conductivity realised in said semiconductor layer (20) below the body region (40), wherein the semiconductor layer (20) comprises a plurality of semiconductor layers (21, 22, 23, 24), overlapped on each other, wherein the resistivity of each layer is different from that of the other layers and in that said column region (50) comprises a plurality of doped sub-regions (51, 52, 53, 54), each realised in one of said semiconductor layers (21, 22, 23, 24), wherein the amount of charge of each doped sub-regions (51, 52, 53, 54) balances the amount of charge of the semiconductor layer (21, 22, 23, 24) wherein each doped sub-region (51, 52, 53, 54) is realised.
Abstract:
Method for manufacturing electronic devices on a semiconductor substrate (1, 1a; 10, 11) with wide band gap comprising the steps of: forming a screening structure (3a, 20) on said semiconductor substrate (1, 1a; 10, 11) comprising at least a dielectric layer (2, 20) which leaves a plurality of areas of said semiconductor substrate (1, 1a; 10, 11) exposed, carrying out at least a ion implantation of a first type of dopant in said semiconductor substrate (1, 1a; 10, 11) to form at least a first implanted region (4, 40), carrying out at least a ion implantation of a second type of dopant in said semiconductor substrate (1, 1a; 10, 11) to form at least a second implanted region (6, 6c; 60, 61) inside said at least a first implanted region (4, 40), carrying out an activation thermal process of the first type and second type of dopant with low thermal budget suitable to complete said formation of said at least first and second implanted regions (4, 40; 6, 60).
Abstract:
A switching device including: a body (2) of semiconductor material, which has a first conductivity type and is delimited by a front surface (S a ); a contact layer (12) of a first conductive material, which extends in contact with the front surface; and a plurality of buried regions (20), which have a second conductivity type and are arranged within the semiconductor body, at a distance from the contact layer.