# Bipolar Transistor

The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform

### D Ritter – 1st expert on this subject based on the ideXlab platform

• ##### Resistive Switching in $\hbox{HfO}_{2}$ Probed by a Metal–Insulator–Semiconductor BipolarTransistor
IEEE Electron Device Letters, 2012
Co-Authors: E. Yalon, A. Gavrilov, S. Cohen, D. Mistele, B. Meyler, J. Salzman, D Ritter

Abstract:

Resistive switching in thin HfO2 films is studied using a metal-insulator-semiconductor Bipolar Transistor structure. Using this structure, electron injection into the semiconductor valence band can be distinguished from injection into the conduction band. In addition, the p-n junction serves as a sensitive detector of damage induced by the switching effect. The implications of the obtained experimental results on the validity of various conduction mechanisms through the insulator are discussed.

• ##### resistive switching in hbox hfo _ 2 probed by a metal insulator semiconductor BipolarTransistor
IEEE Electron Device Letters, 2012
Co-Authors: E. Yalon, A. Gavrilov, S. Cohen, D. Mistele, B. Meyler, J. Salzman, D Ritter

Abstract:

Resistive switching in thin HfO2 films is studied using a metal-insulator-semiconductor Bipolar Transistor structure. Using this structure, electron injection into the semiconductor valence band can be distinguished from injection into the conduction band. In addition, the p-n junction serves as a sensitive detector of damage induced by the switching effect. The implications of the obtained experimental results on the validity of various conduction mechanisms through the insulator are discussed.

• ##### Metal-insulator-semiconductor BipolarTransistor as a 4F2 vertical RRAM selection device
2012 12th Annual Non-Volatile Memory Technology Symposium Proceedings, 2012
Co-Authors: E. Yalon, D Ritter

Abstract:

The metal-insulator-semiconductor Bipolar Transistor detects the injection of minority carriers through a resistive switching element into a semiconductor electrode. We propose that this device may serve as a selection device for Bipolar resistive switching elements in large memory crossbar arrays. The selection is accomplished by inspection of the highly non-linear minority carrier current. The experimental device provides non-linearity of about ~80 mV/decade, but 60 mV/decade is feasible. The device may potentially be confined into the minimal 4F2 footprint. The selection properties of the device are discussed, and compared to those of alternative selection devices suitable for Bipolar switching elements.

### Tomislav Suligoj – 2nd expert on this subject based on the ideXlab platform

• ##### Double-Emitter HCBT Structure—A High-Voltage BipolarTransistor for BiCMOS Integration
IEEE Transactions on Electron Devices, 2012
Co-Authors: Marko Koricic, Tomislav Suligoj, Hidenori Mochizuki, So-ichi Morita, Katsumi Shinomura, Hisaya Imai

Abstract:

Fabrication of a novel high-voltage double-emitter horizontal current Bipolar Transistor (HCBT) structure integrated with the standard 0.18-μm CMOS and high-speed HCBT is presented. The device takes advantage of 3-D collector charge sharing to achieve full depletion of the intrinsic collector region and to limit the electric field at the base-collector junction. Transistors with BVCEO = 12.6 V, fT ·BVCEO = 160 GHz·V , and β·VA = 28 700 V are demonstrated. The device is fabricated in HCBT BiCMOS process flow without the use of additional lithography masks and represents a zero-cost solution for integration of a high-voltage Bipolar device.

• ##### Examination of Horizontal Current BipolarTransistor (HCBT) with double and single polysilicon region
2012 IEEE Bipolar BiCMOS Circuits and Technology Meeting (BCTM), 2012
Co-Authors: Tomislav Suligoj, M. Koričić, H. Mochizuki, S. Morita, K. Shinomura, H. Imai

Abstract:

Horizontal Current Bipolar Transistor (HCBT) with implanted n+ collector (single-poly HCBT) has a higher fT and fmax by 50 % and 36%, respectively, comparing to HCBT with polysilicon n+ collector (double-poly HCBT). The physical mechanisms responsible for the improvement of fT and fmax of single-poly HCBT are examined by the measurements of Transistors, test structures and by simulations. Besides the current crowding effect, it is shown that RC dominantly limits fT in double-poly HCBT. The dominant component of RC is identified to be the resistance of the interface oxide between the n+ polysilicon and the n-hill collector regions.

• ##### Collector region design and optimization in Horizontal Current BipolarTransistor (HCBT)
2010 IEEE Bipolar BiCMOS Circuits and Technology Meeting (BCTM), 2010
Co-Authors: Tomislav Suligoj, M. Koričić, H. Mochizuki, S. Morita, K. Shinomura, H. Imai

Abstract:

Three different types of the n-collector region of Horizontal Current Bipolar Transistor (HCBT) are analyzed and compared. The optimum n-collector profile suppresses the charge sharing effect between the intrinsic and extrinsic base regions, resulting in the uniform base width and electric field in the intrinsic Transistor. This implies a maximum BVCEO and an optimum fTBVCEO product among compared structures. The HCBT with a selectively implanted collector (SIC) is introduced and examined. It reduces RC and increases fT comparing to the other n-collector designs. The analyses give the guidelines for the optimum HCBT design for targeted applications.

### S. Cohen – 3rd expert on this subject based on the ideXlab platform

• ##### Resistive Switching in $\hbox{HfO}_{2}$ Probed by a Metal–Insulator–Semiconductor BipolarTransistor
IEEE Electron Device Letters, 2012
Co-Authors: E. Yalon, A. Gavrilov, S. Cohen, D. Mistele, B. Meyler, J. Salzman, D Ritter

Abstract:

Resistive switching in thin HfO2 films is studied using a metal-insulator-semiconductor Bipolar Transistor structure. Using this structure, electron injection into the semiconductor valence band can be distinguished from injection into the conduction band. In addition, the p-n junction serves as a sensitive detector of damage induced by the switching effect. The implications of the obtained experimental results on the validity of various conduction mechanisms through the insulator are discussed.

• ##### resistive switching in hbox hfo _ 2 probed by a metal insulator semiconductor BipolarTransistor
IEEE Electron Device Letters, 2012
Co-Authors: E. Yalon, A. Gavrilov, S. Cohen, D. Mistele, B. Meyler, J. Salzman, D Ritter

Abstract:

Resistive switching in thin HfO2 films is studied using a metal-insulator-semiconductor Bipolar Transistor structure. Using this structure, electron injection into the semiconductor valence band can be distinguished from injection into the conduction band. In addition, the p-n junction serves as a sensitive detector of damage induced by the switching effect. The implications of the obtained experimental results on the validity of various conduction mechanisms through the insulator are discussed.

• ##### A Double-Heterojunction BipolarTransistor Having a Degenerately Doped Emitter and Backward-Diode Base Contact
IEEE Transactions on Electron Devices, 2011
Co-Authors: D. Cohen-elias, S. Cohen, A. Gavrilov, S. Kraus, D Ritter

Abstract:

A double-heterojunction Bipolar Transistor having a degenerately doped emitter layer is investigated. The base-emitter Esaki diode introduces very low input impedance in the off- state but does not degrade the current gain at high forward bias. The heavily doped emitter layer makes it possible to scale the emitter-layer thickness considerably. The heavily doped emitter layer also allows contacting the base via the base-emitter backward diode. The high-frequency performance of the device is presented.