Abstract:
The present disclosure provides a method for manufacturing ordered nanowires array of NiO doped with Pt in situ, comprising: growing a Ni layer on a high-temperature resistant and insulated substrate; applying a photoresist on the Ni layer, pattering a pattern region of the ordered nanowires array by applying electron beam etching on the photoresist, growing Ni on the pattern region of the ordered nanowires array, peeling off the photoresist by acetone and etching the surface of the Ni layer by ion beam etching so as to etch off the Ni layer grown on the surface of the substrate and to leave the Ni on the pattern region of the ordered nanowires array to form the ordered Ni nanowires array; dipping the ordered Ni nanowires array into a solution of H2PtCl6 so as to displace Pt on the Ni nanowires array by a displacement reaction; and oxidizing the Ni nanowires array attached with Pt in an oxidation oven to obtain the ordered nanowires array of NiO doped with Pt. The present invention is simple and practical and the sensitivity and reliability of the doped sensor on the gas of CO and H2 are greatly improved.
Abstract:
A semiconductor device includes a fin extending on a substrate along a first direction; a gate extending along a second direction across the fin; and source/drain regions and a gate spacer on the fin at opposite sides of the gate, in which there is a surface layer on the top and/or sidewalls of the fin.
Abstract:
The present invention discloses a composite gate dielectric layer for a Group III-V substrate and a method for manufacturing the same. The composite gate dielectric layer comprises: an AlxY2-xO3 interface passivation layer formed on the group III-V substrate; and a high dielectric insulating layer formed on the AlxY2-xO3 interface passivation layer, wherein 1.2≤x≤1.9. The composite gate dielectric layer modifies the Al/Y ratio of the AlxY2-xO3 interface passivation layer, changes the average number of atomic coordination in the AlxY2-xO3 interface passivation layer, and decreases the interface state density and boundary trap density of the Group III-V substrate, increases the mobility of the MOS channel. By cooperation of the AlxY2-xO3 interface passivation layer and high dielectric insulation layer, it reduces leakage current and improves tolerance of the dielectric layer on the voltage, and improves the quality of the MOS capacitor of the Group III-V substrate and enhances its reliability.