4results about How to "Improve switch reliability" patented technology

The invention relates to the technical field of MOS semiconductors, and discloses a junction terminal expansion structure, which comprises a metal drain electrode, source region source electrode metal, grid electrode metal, terminal source electrode metal and a semiconductor epitaxial layer, polycrystalline silicon is arranged between the source region source electrode metal and the semiconductor epitaxial layer and between the gate electrode metal and the semiconductor epitaxial layer, the polycrystalline silicon is in ohmic contact with the gate electrode metal, the surface of the polycrystalline silicon is covered with a gate oxide layer, the semiconductor epitaxial layer comprises a substrate layer and a diffusion layer, and the diffusion layer comprises an active region, a main junction and a multi-region junction terminal expansion structure. The active region comprises an active region heavily doped N layer and a source region P layer; the main junction comprises two main junction P layers, a main junction heavily doped P layer and a main junction isolation ring. According to the invention, whether the epitaxial layer of the sampled semiconductor meets the requirements of a production process is tested through the source and drain current, the power consumption and the delay time of the sampled semiconductor, so that the time required by sampling detection is greatly shortened, and the accuracy of sampling detection is effectively ensured.

The invention relates to the technical field of MOS semiconductors, and discloses a device terminal structure introducing an isolating ring, which comprises a drain electrode, a semiconductor epitaxial layer, a source electrode, a grid electrode and a field oxide layer, and is characterized in that the semiconductor epitaxial layer comprises an N substrate layer and an N drift layer, and the N drift layer forms an active region, a main junction and a multi-region junction terminal expansion structure through ion implantation; a plurality of P-type isolating rings are formed in the main junction through ion implantation; and a plurality of P-type expansion rings and an N-type outer isolation ring are formed in the multi-region junction terminal expansion structure through ion implantation. By segmenting the main junction and introducing the P-type isolating ring, a current path formed by the charging and discharging effect of the terminal structure in the switching process of the power device is blocked from the physical level, a strong electric field and leakage current are prevented from being formed at the sensitive position of the main junction, and the phenomenon that the main junction and cells close to the active region are damaged in advance during high-speed switching is avoided.

The utility model discloses a machine tool magazine protection structure, which belongs to the technical field of machine tool accessories and comprises two parallel guide plates. The tool magazine door is located between the two guide plates; a driving assembly is arranged between each guide plate and the corresponding guide plate; the two baffles are arranged at the two ends of the guide plates respectively and fixedly connected with the two guide plates respectively; the two baffles and the two guide plates form a protection cavity, and the tool magazine door moves in the protection cavity. The flushing assembly comprises a flushing pipeline, the flushing pipeline is connected with a first flushing opening, and the first flushing opening faces the gap between the tool magazine door and the guide plate; the driving assemblies are arranged between the tool magazine door and the two guide plates, the two driving assemblies are symmetrically arranged, it is guaranteed that the stress of the tool magazine door is balanced in the moving process, and the tool magazine door is stable and reliable in the opening and closing process; meanwhile, in the workpiece machining process, the first flushing opening of the flushing assembly can flush cuttings accumulated on the two sides of the tool magazine door, and the situation that the cuttings hinder opening and closing of the tool magazine door is avoided.

A kind of cleaning machine, including inner container, door body and hinge assembly, and the front side of inner container is provided with opening, the bottom of door body is reversibly arranged at the bottom edge of opening, to open or close opening, hinge assembly includes first door hinge, it is arranged in the first side of door body, the rear of first door hinge is rotatably connected in the first side of inner container;Second door hinge, it is arranged in the second side of door body, the rear of second door hinge is rotatably connected in the second side of inner container;First pull rope, first end is connected with the rear end of first door hinge, second end is extended to the below of inner container by guide wheel support change direction after;Second pull rope, first end is connected with the rear end of second door hinge, second end is extended to the below of inner container by guide wheel support change direction after;Elastic piece, it is transversely arranged below inner container and between first pull rope and second pull rope, the first end of elastic piece is connected with the second end of first pull rope, the second end of elastic piece is connected with the second end of second pull rope.