2018年第79回応用物理学会秋季学術講演会

講演情報

一般セッション(口頭講演)

2 放射線 » 2.2 検出器開発

[21p-224B-1~8] 2.2 検出器開発

2018年9月21日(金) 13:00 〜 15:00 224B (224-2)

前畑 京介(九大)

14:00 〜 14:15

[21p-224B-5] Development of X-ray Imaging Sensors Based on Epitaxially Grown Thick CdTe Layers on Si Substrates

Niraula Madan1、安田 和人1、坪田 眞太郎1、山口 大貴1、小澤 潤也1、森 拓郎1、安形 保則1 (1.名工大院工)

キーワード:X-ray imaging detector、CdTe、epitaxial growth

Fine-pixels X-ray imaging sensor was developed using epitaxially grown CdTe layer on Si substrate. The sensor has an effective area of 12 x 12 mm2, which was developed by using a 60 mm- thick single crystal CdTe epilayer grown on 25.4 x 25.4 mm2 sized n+-Si substrate. The sensor consists of (128x128) pixels in a 80 mm pitch in a p-CdTe/n-CdTe/n+-Si heterojunction diode structure. Each pixel in the array is bump-bonded to CMOS read-out ASIC. The sensor is operated in the charge integration mode. The basic performance of this sensor was evaluated by measuring the array dark currents and taking the X-ray images. Details on the array fabrication, characterization along with a review of our epitaxial growth based detector development technique will be presented.