公开(公告)号：JPH07202247A

公开(公告)日：1995-08-04

申请号：JP28099794

申请日：1994-11-15

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： AKI YOSHIYASU ,  BOKU HEIUN ,  KAN SENKEI ,  SAI EIKAN ,  KIN KEIGIYOKU

IPC: H01L31/10 ,  H01L31/0352

Abstract: PURPOSE: To provide a device wherein, by utilizing the resonant tunneling effect, operation is controlled by light. CONSTITUTION: A quantum-well structure 40 has two or more barriers, a collector electrode 21 and an emitter electrode 22 for applying a bias to the quantum- well structure 40, and a gap layer 6 provided between the quantum-well structure 40 and the collector electrode 21 are provided. The gap layer 6 is made of a material which has a band gap smaller than that of the barrier of the quantum well 40. For the gap layer 6 to be irradiated with light, a window part 70 is provided.

公开(公告)号：JPH08222723A

公开(公告)日：1996-08-30

申请号：JP31925495

申请日：1995-12-07

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIN KEIGIYOKU ,  JIYO GOUKIYOU

IPC: H01L29/68 ,  H01L29/06 ,  H01L29/737 ,  H01L29/772

Abstract: PROBLEM TO BE SOLVED: To lessen the positional change of the restriction energy level within a quantum well and the change of the width of energy by interposing a quantum-well layer between shock absorbing layers, and gentling the inclination of the energy band of a quantum well layer being changed by an applied voltage. SOLUTION: A connector potential barrier layer 35 of quantum-well structure is made on the first shock absorbing layer 15, and thereon the second shock- absorbing layer 19 not doped with impurities is made. This can prevent it from inclining suddenly, when specified base-emitter voltage or collector-emitter voltage is applied and the energy band of a collector potential barrier layer 17 inclines. Accordingly, the positional change of the quantum restricting energy level within the quantum well, constituting the collector potential barrier layer 17 and the change of the width of energy, can be made small. Moreover, the NDR region of a current-voltage property curve is not fixed and can be adjusted by the combination of voltage and a current-voltage property curve, which has an acute NDR, can be obtained.