Abstract: A phase-change memory (PCM) cell is provided to include a first electrode, a second electrode, and a phase-change feature disposed between the first electrode and the second electrode. The phase-change feature is configured to change its data state based on a write operation performed on the PCM cell. The write operation includes a reset stage and a set stage. In the reset stage, a plurality of reset current pulses are applied to the PCM cell, and the reset current pulses have increasing current amplitudes. In the set stage, a plurality of set current pulses are applied to the PCM cell, and the set current pulses exhibit an increasing trend in current amplitude. The current amplitudes of the set current pulses are smaller than those of the reset current pulses.

Abstract: A sealing container, which includes a container body, an internally ribbed split locating ring mounted around the container body, a clamp fastened to flanged ends of the split locating ring to fix the split locating ring to the container body, a cover pivoted to the flanged ends of the split locating ring, a rubber seal ring fastened to the cover at a bottom side for sealing the container body, a lever pivoted to the a fixed block at the split locating ring, and a locking plate pivoted to the lever and controlled by the lever to lock the cover after closing of the cover on the container body.