Abstract: In a method for obtaining the equivalent oxide thickness of a dielectric layer, a first semiconductor capacitor including a first silicon dioxide layer and a second semiconductor capacitor including a second silicon dioxide layer are provided and a modulation voltage is applied to the semiconductor capacitors to measure a first scanning capacitance microscopic signal and a second scanning capacitance microscopic signal. According to the equivalent oxide thicknesses of the silicon dioxide layers and the scanning capacitance microscopic signals, an impedance ratio is calculated. The modulation voltage is applied to a third semiconductor capacitor including a dielectric layer to measure a third scanning capacitance microscopic signal. Finally, the equivalent oxide thickness of the dielectric layer is obtained according to the equivalent oxide thickness of the first silicon dioxide layer, the first scanning capacitance microscopic signal, third scanning capacitance microscopic signal, and the impedance ratio.

Abstract: A water-distributing control valve includes a valve body, a valve shaft, at least one stop ring, a water-stop pad, a pressure distributing plate and a bolt element. The valve body includes a watering pipe extended from the outer periphery thereof and having an outlet defined therein. The valve body further includes a bore formed therein. The valve shaft inserted into the valve body includes a rotary lever disposed at the front end thereof. An arcuate slot and at least one annular groove are mounted at the intermediate section of the valve shaft. A plurality of through apertures and a receiving recess are arranged at the rear end of the valve shaft. The valve shaft includes an inlet attached on the bottom thereof. The pressure distributing plate is matingly engaged in the water-stop pad and then placed into the receiving recess together with the water-stop pad.

Abstract: A water-distributing control valve comprises a valve body, a valve shaft, at least one stop ring, a water-stop pad, a pressure distributing plate and a bolt element, wherein the valve body includes a watering pipe extended from the outer periphery thereof and having an outlet defined therein, and includes a bore formed therein, the valve shaft inserted into the valve body includes a rotary lever disposed at the front end thereof, and includes an arcuate slot and at least one annular groove all mounted at the intermediate section thereof, and includes a plurality of through apertures and a receiving recess all arranged at the rear end thereof, and includes an inlet attached on the bottom thereof, the pressure distributing plate is matingly engaged in the water-stop pad and then placed into the receiving recess together with the water-stop pad, thus preventing the water-stop pad from being deformed by the water pressure and scraped by the edge rim of the outlet.