Daisuke Kawae

P-9: Numerical Analysis on Temperature Dependence of Characteristics of Amorphous In-Ga-Zn-Oxide TFT

We fabricated inverted-staggered amorphous In-Ga-Zn-O (a-IGZO) TFTs and measured temperature dependence of the TFT characteristics. A Vth shift between 120°C and 180°C was as large as about 4 V. In the analysis with 2-D numerical simulation, we could reproduce the measured result by assuming two kinds of donor-like states as carrier generation sources.

UHF RFCPUs on Flexible and Glass Substrates for Secure RFID Systems

A radio frequency integrated circuit (RFIC) tag consisting of an 8 bit CPU, a 4 kB ROM, a 512B SRAM, and an RF circuit, which communicates using 915 MHz UHF RF signals, has been developed on both a flexible substrate and a glass substrate. Each of the RFIC tags employs a single DES and an anti-side channel attack routine in firmware for secured communication, and occupies an area of 10.5 mm in width and 8.9 mm in height. The RFIC tag on the flexible substrate is 145 mum thick and weighs 262 mg, and the RFIC tag on the glass substrate consumes 0.54 mW at a power supply voltage of 1.5 V and communicates with a maximum range of 43 cm at a power of 30 dBm. The high-performance poly-silicon TFT technology on flexible substrate and glass substrate of 0.8 mum design rule, and a gate plus one metal layer are used for fabrication. The RFIC tag realizes stable internal clock generation and distribution by a digital control clock generator and a two-phase nonoverlap clock scheme, respectively.

P‐11: Development of a 1.51‐in. Quarter‐XGA (Monochrome 423ppi) Fully Integrated AMOLED Display and a Proposal of its Applications

We have succeeded in development of the fully integrated AMOLED display suitable for a small-text portable information display terminal which realizes a super high resolution and integrates a luminance compensation circuit and a DC/DC converter on the substrate for the first time in the world. In this paper, we would like to discuss an approach to realize a super high resolution and technology for integrating functional circuits. We would also like to introduce an AMOLED display that we have recently fabricated. In addition, we would like to propose some applications of the AMOLED display.