講演情報
[11a-S1-8]Flexible Complementary Analog and Digital Circuits Using Organic–Inorganic Hybrid Thin-Film Semiconductors
〇(D)Haonan Fan4, Tsurumi Junto1, Makita Tatsuyuki1, Tanaka Yuki1, Kameyama Ryohei4, Yamashita Yu3,4, Watanabe Shun4, Takeya Jun1,2,3,4 (1.PI CRYSTAL., 2.JST CREST, 3.NIMS, 4.Univ. of Tokyo)
キーワード：
integrated circuits
Flexible differential amplifiers (Diff-Amps) are essential building blocks for wearable electronics, smart sensing systems, and advanced flexible circuits. However, their development remains limited by trade-offs among manufacturing cost, electrical performance, device uniformity, and mechanical compatibility. To address these issues, we developed high-performance, highly uniform TFT arrays and three-stage complementary Diff-Amps on polyimide substrates using fully solution-processed techniques. The devices employ C9-DNBDT-NW as the p-type semiconductor and amorphous indium zinc oxide (IZO) as the n-type semiconductor (Fig. 1a) [1,2].The fabricated Diff-Amps exhibited high electrical performance, including DC and AC voltage gains of 4172 V/V (72.4 dB) and 3162 V/V (70 dB), a CMRR of 93 dB, and a cutoff frequency of 1 kHz, corresponding to a GBWP exceeding 3.16 MHz (Fig. 1b). Excellent device-to-device uniformity was confirmed across 60 Diff-Amps fabricated on a 10 x 10 cm2 substrate. To demonstrate system-level integration, we further constructed a 4-bit SAR ADC incorporating the Diff-Amp as a comparator together with solution-processed SAR control logic and DAC. The ADC operated stably at 125 Hz, achieving an SNR of 25.01 dB and an ENOB of 3.86, close to the theoretical limit of a 4-bit ADC (Fig. 1c). These results highlight the potential of solution-processed hybrid complementary circuits for scalable, high-performance flexible integrated electronics [3].Figure 1. (a) Schematic illustration of the device structure. (b) Open-loop DC characteristics obtained by sweeping V_in+ from 0 to 10 V in 1 mV steps, while varying V_in- from 0 to 9 V in 1 V steps. (c) Digital output of the 4-bit ADC for fixed analog inputs. Representative operation at V_AIN = 5.94 V with a 500 Hz clock shows V_CLK (green), V_SO (purple), V_DAC (blue), and COMPOUT (orange).