pH Sensing Characterization of Programmable Sm2O3/Si3N4/SiO2/Si Electrolyte--Insulator--Semiconductor Sensor with Rapid Thermal Annealing

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概要

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• A programmable silicon--oxide--nitride--oxide--silicon (SONOS)-like electrolyte--insulator--semiconductor (EIS) sensor with a Sm2O3/Si3N4/SiO2/Si structure is demonstrated for pH detection. This proposed programmable EIS sensor with insulator--nitride--oxide (INO) multiple sensing layers exhibits a high pH sensitivity (larger than the ideal Nernst response, {\sim}59 mV/pH) owing to the hydrogen ion attraction by electrons trapped within the embedded Si3N4 layer after stressing. To increase the pH response, rapid thermal annealing is performed on the programmable EIS devices. The obtained results support our hypothesis that the pH response can be effectively increased after 700 °C annealing. A sensing model on the basis of the charge attraction and surface roughness is also presented. Compared with the conventional EIS device, the programmable EIS sensor functionalized with annealing and stressing can be used in future pH sensor applications owing to its high pH sensing response.

• 2011-10-25

著者

• Lai Chao-sung

  Department Of Electronic Engineering Chang Gung University

• Lu Tseng-fu

  Department Of Electronic Engineering Chang Gung University

• Pan Tung-ming

  Department Of Electronic Engineering Chang Gung University

• Kao Chyuan-haur

  Department Of Electronic Engineering Chang Gung University

• Wang Jer-chyi

  Department Of Electronic Engineering Chang Gung University

• Shih Hui-Yu

  Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan 333, Taoyuan, Taiwan

• Yang Chia-Ming

  Inotera Memories, Inc., 667 Fu-Hsing 3rd Road, Hwa-Ya Technology Park, Kweishan 333, Taoyuan, Taiwan

• Kao Chyuan-Haur

  Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan 333, Taoyuan, Taiwan

• Pan Tung-Ming

  Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan 333, Taoyuan, Taiwan

• Lu Tseng-Fu

  Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan 333, Taoyuan, Taiwan

• Wang Jer-Chyi

  Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kweishan 333, Taoyuan, Taiwan

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