光子学报, 2017, 46 (9): 0923001, 网络出版: 2017-10-16   

基于标准CMOS工艺的UV/blue光电探测器

UV/blue Photodetector Based on CMOS Technology
作者单位
1 天津大学 微电子学院,天津市成像与感知徽电子技术重点实验室,天津 300072
2 天津大学 电气自动化与信息工程学院,天津 300072
摘要
基于UMC 0.18μm CMOS工艺,提出一种适合紫外/蓝光探测的探测器,该器件由栅体互联的NMOS晶体管和横向/纵向光电二极管构成.其中,浅结的光电二极管由UMC工艺中Twell层(浅P阱)和Nwell层形成,以增强其对紫外/蓝光的吸收,栅体互联的NMOS晶体管可以放大光电流,提高探测器的灵敏度和动态范围.仿真结果表明,本文设计的紫外/蓝光探测器具有低的工作电压和暗电流,对300~550 nm波长范围的光具有高的响应度和宽的动态范围.在弱光条件下(光强小于1 μW/cm2),响应度优于105 A/W,随着光强增大,响应度逐渐降低,但总体仍超过103 A/W.
Abstract
Ultraviolet/blue photodetector based on UMC 0.18μm CMOS technology is proposed, which is constructed by a lateral/vertical PN diode and an NMOS transistor. The shallow PN diode formed by the Twell layer and Nwell layer is used to enhanced the absorption efficiency of Ultraviolet/blue light and separate the photogenerated carriers. Since the gate of NMOS is tied with the Twell layer, it can be adjusted by the Twell voltage induced by the incident illumination. The sensitivity and the dynamic range of the proposed detector are improved. The simulation results show that the detector has extra high responsivity and wide dynamic range for the wavelength window of 300~550 nm. Under the condition of weak light (<1 μW/cm2), the detector has a responsivity more than 105 A/W. With the increase of light intensity, the responsivity decreases but it still better than 103 A/W in the interesting range.
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董威锋, 谢生, 毛陆虹, 廖建文, 朱长举, 乔静. 基于标准CMOS工艺的UV/blue光电探测器[J]. 光子学报, 2017, 46(9): 0923001. DONG Wei-feng, XIE Sheng, MAO Lu-hong, LIAO Jian-wen, ZHU Chang-ju, QIAO Jing. UV/blue Photodetector Based on CMOS Technology[J]. ACTA PHOTONICA SINICA, 2017, 46(9): 0923001.

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