Abstract: A dust-proof sensing device includes a mechanical body, a feeding path, a first photoelectric sensor disposed above the feeding path, a second photoelectric sensor disposed under the feeding path, and an upper bracket. The mechanical body has a feeding path. The upper bracket is mounted above the feeding path. The upper bracket has an upper fastening portion fastened to the mechanical body, an upper wedging portion fastened at the upper fastening portion, an L-shaped upper light guiding holder fastened at the upper fastening portion, and a first light guider fastened at the upper light guiding holder. The upper fastening portion has a first inclined section. An inner edge of an upper surface of the first inclined section is intersected with a top edge of an inner surface of the upper wedging portion to form a clamping angle.

Abstract: A wafer transporting method includes following operations. A plurality of wafers are received in a semiconductor container attached to a mobile vehicle. An air processing system is coupled to a wall of the semiconductor container. The air processing system includes an inlet valve, an outlet valve, a pump between the inlet valve and the outlet valve, and a desiccant coupled to the pump. The semiconductor container is moved. The pump of the air processing system is turned on to extract air from inside the semiconductor container into the air processing system through the inlet valve. Humidity of the air is reduced when the air passes through the desiccant of the air processing system. The air is returned back to the semiconductor container through the outlet valve.

Abstract: A high linearity voltage-current converter able to compensate for mobility degradation comprises a first constant current source circuit, a first current mirror unit, a second constant current source circuit, a second current mirror unit, a seventh MOS transistor and an eighth MOS transistor. The first current mirror unit is coupled to the first constant current source circuit, and the second current mirror unit is coupled to the second constant current source circuit. The seventh MOS transistor, the first current mirror unit and the second current mirror unit are coupled to each other at a third joint point of a first conducting wire. The eighth MOS transistor is coupled to the seventh MOS transistor. Thereby, the electronic components used in the present invention can operate more efficiently.