Abstract: A memory cell for an electrically writeable and erasable memory medium as well as a memory medium thereof is provided. The memory cell comprises a data recording element, the data recording element has a plurality of multiple-layer structure disposed one on top of another, each the multiple-layer structure comprising a plurality of sequentially disposed individual layers. At least one of the plurality of individual layers is capable of changing phase between a crystalline state and an amorphous state in response to an electrical pulse, one of the plurality of individual layers having at least one atomic element which is absent from other one of the plurality of individual layers, and the plurality of multiple-layer structure is of a superlattice-like structure to lower a heat diffusion out of the data recording element to shorten a phase change time of the respective individual layers.

Abstract: An electrically heated garment is provided having the effect of protecting the user against the cold. The garment is made of synthetic fiber fabric, polyurethane foam, polyethylene film, a flexible circuit of aluminum foil, and cotton cloth, formed by hot pressing and gluing each layer in sequence. Furthermore, the two ends of the aluminum foil circuit are connected to the output terminals of a heating control circuit device so that heat energy, which is spread all over the clothes, can be adjusted, raising its temperature to keep the user's body warm. The heating control circuit includes an integrated circuit oscillator whose duty cycle is controlled by a potentiometer, without affecting the oscillation frequency.