Abstract: A method for manufacturing a gate oxide layer containing fluorine is disclosed. The method includes steps of providing a substrate; depositing a fluorinated oxide layer over said substrate; and oxidizing said fluorinated oxide layer at a high temperature. The fluorinated oxide layer according to the present invention exhibits good properties in radiation hardness, hot carrier resistance and breakdown endurance. Thus, it is an excellent method for easily and cost-effectively manufacturing reliable and consistent wafers.

Abstract: A true type single-phase shift circuit including a pair of PMOS transistors, a pair of NMOS transistors, a pair of first-type MOS transistors and one second-type transistor. The source terminals of the two PMOS transistors are both coupled to a first electric potential, the gate terminal of one PMOS transistor is coupled to a data signal, and the gate terminal of the second PMOS transistor is connected between the two first-type MOS transistors. The source terminals of the two NMOS transistors are both coupled to a second electric potential; the gate terminal of one NMOS transitors is coupled to the data signal and the gate of the second NMOS transistor is connected between the two first-type MOS transistors. The two first type MOS transistors are serially connected between the drain terminals of one of the two PMOS transistors and the drain terminal of one of the two NMOS transistors. Each gate terminal of the two first type MOS transistors is coupled to a clock pulse signal.

Abstract: Disclosed is a method for producing a gene product by expressing a gene encoding said gene product in plant host cells, comprising the steps of: constructing a vector expressible in plant host cells, the vector comprising a promoter region derived from an .alpha.-amylase gene of a plant, and a gene encoding a desired gene product; transforming a compatible plant host cell with the vector; cultivating the resultant transformant host cell; subjecting the cultivated transformant host cell to a sugar-depleted or sugar-free condition to promote the expression of the gene under the control of the promoter region; and recovering the expressed gene product. Also disclosed is a method for producing a gene product method which comprises the steps of: constructing a vector expressible in plant host cells, the vector comprising a promoter region derived from an .alpha.

Abstract: A speed controller is equipped to a step motor for controlling the rotation of the step motor with a desired angular velocity. The step motor speed controller utilizes a phase-locked stepping servomechanism (PLSS) in which a phase-controlled oscillator (PCO) comprised of an adaptive digital-pumped controller (ADPC) and a voltage-controller oscillator (VCO) is employed. The step motor speed controller utilizes a tachometer comprised of an optical encoder for detecting the angular speed of the step motor. The tachometer sends out a first pulse train with the frequency thereof indicating the angular velocity of the step motor as a feedback signal to the ADPC. A reference signal source is employed for sending a second pulse train to the ADPC. The ADPC compares the phase difference between the first pulse train and the second pulse train and whereby a signal corresponding the phase difference is sent to the VCO, causing the VCO to output a third pulse train to the step motor.