A wearable computing device is authenticated using bone conduction. Each of the buffers includes a plurality of buffer spaces. In addition, electrode pads are connected to solder balls via a metal wiring pattern arranged on a second surface of the image sensor chip. The support plate may have a first thread. According to an aspect of the present invention, there is provide a wafer spin chuck device comprising: a spin body which spins a wafer; and a stationary body which holds the spin body and is under the spin body with a space between the spin body and the stationary body, wherein the stationary body includes a blocking unit which blocks the space with a fluid. The frame is preferably divided bilaterally into two regions, with the tuner in a first region and the video intermediate frequency circuit part and the stereo demodulator in a second region.