2results about How to "Unchanged thickness" patented technology

The invention provides a quasi-super junction planar gate silicon carbide VDMOS and a preparation method thereof, and the method comprises the steps: depositing metal on the lower side surface of a silicon carbide substrate, and forming a drain metal layer; performing epitaxial growth on the upper side surface of the silicon carbide substrate to form a drift layer; forming a barrier layer, etching, performing ion implantation, forming a plurality of N-type body regions and a plurality of diffusion regions, and forming a P-type well region, an N-type source region and a current sharing layer; re-forming a barrier layer, etching the barrier layer to form a through hole, and depositing to form a gate dielectric layer; a barrier layer is formed again, the barrier layer is etched to form a through hole, metal is deposited, and a gate metal layer is formed; the preparation method comprises the following steps of: re-forming a barrier layer, etching the barrier layer to form a through hole, depositing metal, forming a source metal layer, removing the barrier layer, and completing preparation, so that a quasi-super junction structure and a current sharing layer are constructed in the device, and the voltage endurance capability, the gate reliability and the conduction capability of the device can be effectively improved.

This invention discloses a coffee machine with an automatic tamping device, comprising a main body and a tamping device. The tamping device includes a tamping mechanism, a power mechanism, and a stop mechanism. The stop mechanism includes an elastic component and two stop members. At least one stop member has a protrusion on its opposite end face. The two ends of the elastic component are respectively connected to each stop member, and the elastic component is connected to the tamping mechanism. When the tamping mechanism is in a first position, the elastic component is in a relaxed state, causing the two stop members to separate. When the tamping mechanism is in a second position, the elastic component is in a compressed state, driving the two stop members to contact the stop. Coffee powder enters the tamping space through the feed inlet. When the coffee puck is tamped, the tamping mechanism is in the second position, at which point the two stop members contact and abut, preventing the tamping mechanism from moving further and ensuring that the thickness of the coffee puck remains unchanged. Even if the power mechanism fails to stop in time, the protrusion on the stop member is deformed by pressure, which can act as a buffer to prevent other parts from being damaged.