Shaanxi Lighte Optoelectronics Material Co., Ltd.

Xi'an Eswin Material Technology Co., Ltd.

The Fourth Military Medical University

Wen Zhang

Bin Yang

Nan Wang

Min Yang

Zhen Xue

Jinping Wang

Ying Lu

Xuyang Huo

Zhenyu Ji

Fusheng You

Canhua Xu

Xuetao Shi

Jiaxue Qi

Rongkai Linghu

Ruigang Liu

Xiuzhen Dong

Feng Fu

Na Yi

A processing method for reducing warp of a nitrogen-doped wafer includes dividing a to-be-cut nitrogen-doped crystal ingot into a plurality of to-be-processed crystal ingot segments according to nitrogen content distribution, where each to-be-processed ingot segment corresponds to a nitrogen content range. The method further includes determining a processing condition corresponding to each to-be-processed crystal ingot segment according to correspondences between nitrogen content ranges and processing conditions, where the processing condition enables the corresponding to-be-processed crystal ingot segment to be prevented from warping during wire sawing; and performing cutting processing respectively on the each to-be-processed crystal ingot segment by using the processing condition corresponding to each to-be-processed crystal ingot segment, thereby obtaining a wafer by cutting the to-be-cut nitrogen-doped crystal ingot.

Processing method and system for reducing warp of nitrogen-doped wafer

The present disclosure relates to an organic compound, wherein the organic compound has a structure represented by Formula (1): wherein Ar, Arand Arare the same or different, and are each independently selected from a substituted or unsubstituted aryl having 6 to 30 carbon atoms or a substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a structure represented by Formula (2); and at least one of Ar, Arand Arhas a structure represented by Formula (2); represents a chemical bond. The organic compound of the present disclosure has high thermal stability and glass transition temperature, and can improve the luminous efficiency of an organic electroluminescent device and prolong the service life of the device when used as an electron transport layer material of the organic electroluminescent device.

Organic compound, use thereof and organic electroluminescent device using same

A device for detecting electrical impedance by utilizing a theory of excitation and response signals and method thereof, wherein the excitation signal is a square wave excitation current signal (), the response signal on a target is transformed to a square wave signal with appropriate amplitudes by buffering, amplifying, RC filtering and differential amplifying, then is transformed to a digital signal at a proper time by an analog-to-digital converter. The response signal is sampled once when at high level and once when at low level for every circle by the ADC, and a sample Vand a sample Vare obtained respectively, difference of the samples is taken as a detecting result for one circle. An average value of the detecting result from a plurality of circles is taken as a final result. Information of electrical impedance is illustrated by the final result because the excitation current signal is constant.

Electrical impedance detecting device of portable electrical impedance imaging system and detecting method thereof

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Xi'an, China

Wen Zhang