Abstract:
PURPOSE: An RFID system using human body communication is provided to remarkably reducing the power consumption of a reader and a tag. CONSTITUTION: A first electrode pad receives a signal of a reader(320) transmitted from a body and outputs an output signal to the body. A modulator and a demodulator modulate the output signal of a tag(310) and demodulate the signal of the reader. A digital controller performs the reading and writing operations by responding to the modulated signal of the reader. A coil is connected between the first electrode pad and the second electrode pad. When the tag is operated in a first operation mode, a mode selector connects the second electrode pad with a rectifier. In case that the tag is operated in a second operation mode the mode selector releases the connection between the second electrode pad and the rectifier.
Abstract:
PURPOSE: A manufacturing method of a beta battery is provided to improve the efficiency per unit area with respect to the number of laminated PN joint, and to have a simple process in comparison with a pore-forming process using DRIE(deep reactive ion etching). CONSTITUTION: A manufacturing method of a beta battery: a step of forming an oxide mask(22) in which a predetermined pattern is formed on one side of a substrate(21); a step of forming a plurality of grooves by etching the region in which the oxide mask is not spread; a step of removing the oxide mask, and forming a PN joint layer on the substrate; a step of forming a first electrode on the PN joint layer, and a step of forming a second electrode on the other side of the substrate; and a step of forming a unit module by laminating a radioisotope layer emitting beta rays on the radioisotope layer of the PN joint layer.