Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX

doi:10.1088/1674-1056/ab718a

中国物理B ›› 2020, Vol. 29 ›› Issue (4): 45203-045203.doi: 10.1088/1674-1056/ab718a

所属专题： SPECIAL TOPIC — Ion beam technology

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX

1 Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2 Beijing Radiation Center, Beijing 100875, China

收稿日期:2019-12-31 修回日期:2020-01-22 出版日期:2020-04-05 发布日期:2020-04-05
通讯作者: Bin Liao, Bin Wu E-mail:liaobingz@bnu.edu.cn;bwu6@bnu.edu.cn
基金资助:
Project supported by the Central University Basic Scientific Research Business Expenses Special Funds under the project name of Research on Applied Physics under Low Radiation Background (Grant No. 2018NTST07) and the National Natural Science Foundation Joint Fund Key Project, China (Grant No. U1865206).

Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX

Yuanyuan Liu(刘圆圆)^1,2, Jianping Cheng(程建平)^1,2, Pan Pang(庞盼)², Bin Liao(廖斌)^1,2, Bin Wu(吴彬)^1,2, Minju Ying(英敏菊)^1,2, Fengshou Zhang(张丰收)^1,2, Lin Chen(陈琳)², Shasha Lv(吕沙沙)^1,2, Yandong Liu(刘言东)^1,2, Tianxi Sun(孙天希)^1,2

1 Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2 Beijing Radiation Center, Beijing 100875, China

Received:2019-12-31 Revised:2020-01-22 Online:2020-04-05 Published:2020-04-05
Contact: Bin Liao, Bin Wu E-mail:liaobingz@bnu.edu.cn;bwu6@bnu.edu.cn
Supported by:
Project supported by the Central University Basic Scientific Research Business Expenses Special Funds under the project name of Research on Applied Physics under Low Radiation Background (Grant No. 2018NTST07) and the National Natural Science Foundation Joint Fund Key Project, China (Grant No. U1865206).

摘要/Abstract

摘要： Herein we report a prototypical electronic substrate specifically designed to serve the weakly interacting massive particles (WIMPs) detectors at the China Dark Matter Experiment (CDEX). Because the bulky high-purity germanium (HPGe) detectors operate under liquid-nitrogen temperatures and ultralow radiation backgrounds, the desired electronic substrates must maintain high adhesivity across different layers in such cold environment and be free from any radioactive nuclides. To conquer these challenges, for the first time, we employed polytetrafluoroethylene ((C₂F₄)_n) foil as the base substrate, in conjunction with ion implantation and deposition techniques using an independently developed device at Beijing Normal University for surface modification prior to electroplating. The remarkable peeling strengths of 0.88±0.06 N/mm for as-prepared sample and 0.75±0.05 N/mm for that after 2.5-days of soaking inside the liquid nitrogen were observed, while the regular standards commonly require 0.4 N/mm～ 0.6 N/mm for electronic substrates.

关键词: WIMPs detector, CDEX, surface modification, electronic substrate

Abstract: Herein we report a prototypical electronic substrate specifically designed to serve the weakly interacting massive particles (WIMPs) detectors at the China Dark Matter Experiment (CDEX). Because the bulky high-purity germanium (HPGe) detectors operate under liquid-nitrogen temperatures and ultralow radiation backgrounds, the desired electronic substrates must maintain high adhesivity across different layers in such cold environment and be free from any radioactive nuclides. To conquer these challenges, for the first time, we employed polytetrafluoroethylene ((C₂F₄)_n) foil as the base substrate, in conjunction with ion implantation and deposition techniques using an independently developed device at Beijing Normal University for surface modification prior to electroplating. The remarkable peeling strengths of 0.88±0.06 N/mm for as-prepared sample and 0.75±0.05 N/mm for that after 2.5-days of soaking inside the liquid nitrogen were observed, while the regular standards commonly require 0.4 N/mm～ 0.6 N/mm for electronic substrates.

Key words: WIMPs detector, CDEX, surface modification, electronic substrate

中图分类号: (Plasma-based ion implantation and deposition)

52.77.Dq

95.35.+d (Dark matter) 07.20.Mc (Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)

刘圆圆, 程建平, 庞盼, 廖斌, 吴彬, 英敏菊, 张丰收, 陈琳, 吕沙沙, 刘言东, 孙天希. Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX[J]. 中国物理B, 2020, 29(4): 45203-045203.

Yuanyuan Liu(刘圆圆), Jianping Cheng(程建平), Pan Pang(庞盼), Bin Liao(廖斌), Bin Wu(吴彬), Minju Ying(英敏菊), Fengshou Zhang(张丰收), Lin Chen(陈琳), Shasha Lv(吕沙沙), Yandong Liu(刘言东), Tianxi Sun(孙天希). Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX[J]. Chin. Phys. B, 2020, 29(4): 45203-045203.

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Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX

Developing cold-resistant high-adhesive electronic substrate for WIMPs detectors at CDEX

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