Inhibiting the Kink Effect and Hot-Carrier Stress Degradation Using Dual-Gate Low-Temperature Poly-Si TFTs

被引：12

作者：

Chen, Hong-Chih ^{[1
]}

Huang, Shin-Ping ^{[2
]}

Tu, Yu-Fa ^{[3
]}

Kuo, Chuan-Wei ^{[4
]}

Zhou, Kuan-Ju ^{[5
]}

Chen, Jian-Jie ^{[5
]}

Shih, Yu-Shan ^{[5
]}

Chen, Guan-Fu ^{[5
]}

Su, Wan-Ching ^{[6
]}

Tu, Hong-Yi ^{[6
]}

Huang, Hui-Chun ^{[6
]}

Lai, Wei-Chih ^{[1
]}

Chang, Ting-Chang ^{[5
]}

机构：

[1] Natl Cheng Kung Univ, Dept Photon, Tainan 70101, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung 80424, Taiwan

[3] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 30013, Taiwan

[4] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 80424, Taiwan

[5] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan

[6] Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Kaohsiung 80424, Taiwan

来源：

IEEE ELECTRON DEVICE LETTERS | 2020年 / 41卷 / 01期

关键词：

Kink effect; hot-carrier stress (HCS); floating body effect; impact ionization; POLYCRYSTALLINE-SILICON; HIGH-RESOLUTION; LTPS-TFT; FILM; PERFORMANCE; PBTI; NBTI;

D O I：

10.1109/LED.2019.2951935

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This study examines the appearance of a kink effect phenomenon in the I (D)-V (D) electrical characteristics of low-temperature polycrystalline Si thin-film transistors (LTPS TFTs) after high-current-induced hot-carrier stress (HCS). During HCS, electron-hole pairs were generated in the channel near the drain terminal owing to impact ionization. Next, the electrons were repelled to war the source by the drain electric field, thereby inducing the floating body effect, which lowered the source barrier. In addition, a dual-gate-structured LTPS was found to inhibit the electrical degradation caused by HCS. The COMSOL simulation indicated that in the dual-gate structure, holes at the upper and lower margins of the channel were inverted and inhibited the degradation caused by the floating body effect. Therefore, the use of dual-gate LTPS TFTs could facilitate high-current gate-on-array circuit applications in display panels.

引用

页码：54 / 57

页数：4

共 25 条

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