Abstract:
A method is proposed for manufacturing an integrated electronic device (500). The method includes the steps of providing an SOI substrate (505) including a semiconductor substrate (510), an insulating layer (515) on the semiconductor substrate, and a semiconductor starting layer (512) on the insulating layer, the substrate and the starting layer being of a first type of conductivity, performing an epitaxial growing process, the epitaxial growing process being applied to the starting layer to obtain a thicker semiconductor active layer (542) of the first type of conductivity embedding the starting layer on the insulating layer, forming at least one insulating trench (558) extending from an exposed surface of the active layer to the insulating layer, the at least one insulating trench partitioning the active layer into insulated regions (560) and at least one further insulated region (561), and integrating components (580) of the device in the insulated regions, the components being insulated from the substrate by the insulating layer; in the solution according to an embodiment of the invention, the method further includes, before the step of performing an epitaxial growing process, forming at least one contact trench (520) extending from an exposed surface of the starting layer to the substrate in correspondence to each further insulated region, each contact trench clearing a corresponding portion (530b,530s) of the starting layer, of the insulating layer and of the substrate, implanting dopants of a second type of conductivity different from the first type into at least part of the cleared portions, wherein the epitaxial growing is further applied to the cleared portions thereby at least partially filling each contact trench with semiconductor material, the dopants diffusing during the epitaxial growing to form an insulating region (545) of the second type of conductivity enclosing the at least one contact trench of each further insulated region, and integrating further components (580) of the device in each further insulated region, the further components being insulated from the substrate by a junction formed by the corresponding insulating region with the active layer and/or the substrate when reverse-biased.
Abstract:
A method is proposed for manufacturing an integrated electronic device (400) of the SOI type. The method includes the steps of providing an SOI substrate (105) including a semiconductor substrate (110), an insulating layer (115) on the semiconductor substrate, and a semiconductor starting layer (112) on the insulating layer, performing an epitaxial growing process, the epitaxial growing process being applied to the starting layer to obtain a thicker semiconductor active layer (142) embedding the starting layer on the insulating layer, forming at least one insulating trench (405) extending from an exposed surface of the active layer to the insulating layer, the at least one insulating trench partitioning the active layer into insulated regions (415) and at least one further insulated region (425), and integrating components (420) of the device in the insulated regions; in the solution according to an embodiment of the invention, the method further includes, before the step of performing an epitaxial growing process, forming at least one contact trench (120) extending from an exposed surface of the starting layer to the substrate in correspondence to each further insulated region, wherein each contact trench clears a corresponding portion (130b,130s) of the starting layer, of the insulating layer and of the substrate, the epitaxial growing being further applied to the cleared portions thereby at least partially filling each contact trench with semiconductor material gettering impurities of the active layer, the gettered impurities in the at least one further insulated region being segregated from the insulated regions.
Abstract:
A method for manufacturing an integrated electronic device (100;400;500) is proposed. The method comprises the steps of: providing an SOI substrate (105;505) comprising a semiconductor substrate (110;510), an insulating layer (115;515) on the semiconductor substrate, and a semiconductor starting layer (112;512) on the insulating layer; epitaxially growing the starting layer to obtain a semiconductor active layer (142;542) on the insulating layer for integrating components of the device, and forming at least one contact trench (120;520) extending from an exposed surface of the starting layer to the semiconductor substrate before the step of epitaxially growing the starting layer, wherein each contact trench clears a corresponding portion (130b,130s;530b,530s) of the starting layer, of the insulating layer and of the semiconductor substrate, the epitaxial growing being further applied to the cleared portions thereby at least partially filling the at least one contact trench with semiconductor material.
Abstract:
An inductive structure (1) integrated in a semiconductor substrate (2), comprising at least a conductive element (3) insulated from the substrate (2), comprising an insulating structure (4), which is formed inside said semiconductor substrate (2) and built close to said conductor element (3), so that the resistance of said substrate (2) is increased and the parasitic currents induced by the conductor element (3) in the substrate (2) are decreased.
Abstract:
The invention relates to an electronic level shifter circuit (1) for driving a high-voltage output stage (2). This output stage (2) comprises a complementary pair (3) of transistors (I36,I32) connected between first (Vdd) and second (Vss) supply voltage references, and at least one PMOS pull-up transistor (I32) connected in series with an NMOS pull-down transistor (I36). An additional transistor (I34) is connected in parallel with the pull-up transistor (I32), and the driver circuit (1) has a first output (A) connected to the control terminal of the pull-up transistor (I32) and a second output connected to the control terminal of the additional transistor (I34).
Abstract:
A method is proposed for manufacturing an integrated electronic device (400) of the SOI type. The method includes the steps of providing an SOI substrate (105) including a semiconductor substrate (110), an insulating layer (115) on the semiconductor substrate, and a semiconductor starting layer (112) on the insulating layer, performing an epitaxial growing process, the epitaxial growing process being applied to the starting layer to obtain a thicker semiconductor active layer (142) embedding the starting layer on the insulating layer, forming at least one insulating trench (405) extending from an exposed surface of the active layer to the insulating layer, the at least one insulating trench partitioning the active layer into insulated regions (415) and at least one further insulated region (425), and integrating components (420) of the device in the insulated regions; in the solution according to an embodiment of the invention, the method further includes, before the step of performing an epitaxial growing process, forming at least one contact trench (120) extending from an exposed surface of the starting layer to the substrate in correspondence to each further insulated region, wherein each contact trench clears a corresponding portion (130b,130s) of the starting layer, of the insulating layer and of the substrate, the epitaxial growing being further applied to the cleared portions thereby at least partially filling each contact trench with semiconductor material gettering impurities of the active layer, the gettered impurities in the at least one further insulated region being segregated from the insulated regions.