摘要:
Provided are a laser diode using zinc oxide nanorods and a manufacturing method thereof. The laser diode using zinc oxide nanorods according to one embodiment of the present disclosure includes: a wafer; an electrode layer formed on the wafer; a nanorod layer including a plurality of n-doped zinc oxide nanorods grown on the electrode layer; and a p-doped single crystal semiconductor layer that is physically in contact with the ends of the zinc oxide nanorods.
摘要:
An apparatus and a method for testing a socket are disclosed. The resistance values of the contactor pins of the socket can be precisely measured, and the measurement is made automatic so as to decrease the expense and manpower. The method includes the following steps. That is, a calibration PCB is formed into a closed circuit, and all the resistance values forming a closed circuit loop for respective channels are extracted and stored (first step). A socket-installed PCB is formed into a closed circuit, and all resistance values forming a closed circuit loop for respective channels are extracted and stored (second step). Differences between the resistance values of the respective channels of the calibration PCB and the resistance values of the respective channels of the socket-installed PCB are calculated (third step). The differences thus calculated are displayed to a screen for the respective channels (fourth step).
摘要:
Disclosed are an oxide-based nonvolatile memory with superior resistive switching characteristics and a method for preparing the same. More particularly, the disclosure relates to a nonvolatile memory device having a metal/reduced graphene oxide (r-GO) thin film/metal structure and a method for preparing the same.
摘要:
Disclosed is a nanorod semiconductor device having a contact structure, and a method for manufacturing the same. The nanorod semiconductor device having a contact structure according to one embodiment of the present disclosure includes: a transparent wafer; a transparent electrode layer formed on the transparent wafer; a nanorod layer including a plurality of semiconductor nanorods doped with dopants having a first polarity and grown on the transparent electrode layer; and a single crystal semiconductor layer doped with dopants having a second polarity and forming a certain physical contact with the ends of the semiconductor nanorods.
摘要:
Provided are a laser diode using zinc oxide nanorods and a manufacturing method thereof. The laser diode using zinc oxide nanorods according to one embodiment of the present disclosure includes: a wafer; an electrode layer formed on the wafer; a nanorod layer including a plurality of n-doped zinc oxide nanorods grown on the electrode layer; and a p-doped single crystal semiconductor layer that is physically in contact with the ends of the zinc oxide nanorods.
摘要:
The present invention relates to an improved process for preparing simvastatin and more particularly, the improved process for preparing simvastatin expressed by formula 1 with high yield and high purity by performing the following sequential processes comprising: (i) hydrolysis of lovastatin as starting material with potassium t-butoxide in an organic solvent and small amount of water under a mild reaction condition, followed by lactonization of the obtained solid intermediate with preventing from formation of by-products; (ii) protection of an alcohol group with t-butyldimethylsilyl group which can be easily removed with concentrated hydrochloric acid without the formation of by-products; (iii) acylation of the obtained protected intermediate with acyloxytriphenyl phosphonium salt as an acylating agent under a mild reaction condition; and (iv) removal of the silyl protective group with a concentrated hydrochloric acid. The present invention is to provide the improved process of preparing simvastatin expressed by formula 1 environmentally sound, economically efficient, and industrially useful.