共查询到19条相似文献,搜索用时 93 毫秒
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碲镉汞薄膜的有机金属化合物汽相外延生长 总被引:5,自引:0,他引:5
利用水平,常压有机金属化合物汽相外延(MOVPE)装置,DMCd,DIPT及元素汞在360℃,采用互扩散多层工艺,通过计算机控制,在GaAs,CdTe衬底上按不同条件生长碲化镉,碲化汞和碲镉汞的初步结果,包括组分,表面形态,薄膜厚度,红外透射比和电学特性等,其中有原生的和经过一定条件退火处理的结果。 相似文献
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本文简要综述了液相外延(LPE)、分子束外延(MBE)、金属有机物汽相外延(MOVPE)生长碲镉汞(MCT)单晶薄膜的工艺特点,存在的问题和发展趋势. 相似文献
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报道了近年来昆明物理研究所在富碲水平推舟液相外延碲镉汞外延薄膜制备技术方面的进展。2019年以来,突破了?120 mm碲锌镉晶体定向生长技术,使碲锌镉衬底沉积相和夹杂相密度≤5×103 cm-2,位错腐蚀坑密度(EPD)≤4.0×104 cm-2,?120 mm(111)晶圆衬底的Zn组份分布极差≤0.36%。基于碲锌镉衬底技术的进步,液相外延碲镉汞薄膜的最大生长尺寸达到了70 mm×75 mm,薄膜位错腐蚀坑密度均值为5×104 cm-2,X射线双晶回摆曲线半峰宽(DCRC-FWHM)≤35 arcsec,部分可控制到25 arcsec以下;50 mm×60 mm尺寸长波碲镉汞薄膜的厚度极差≤±1.25 μm,室温截止波长极差≤±0.1 μm,中波碲镉汞薄膜相应指标分别为≤±1 μm、≤±0.05 μm。材料技术的进展促进了制冷型碲镉汞探测器产能提升和成本的降低,也支撑了高性能长波/甚长波探测器、高工作温度(HOT)探测器以及2048×2048、4096×4096等甚高分辨率高性能探测器的研制。 相似文献
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Progress in MOVPE of HgCdTe for advanced infrared detectors 总被引:1,自引:0,他引:1
This paper reviews the significant progress made over the past five years in the development of metalorganic vapor phase epitaxy
(MOVPE) for the in situ growth of HgCdTe p-n junction devices for infrared detector arrays. The two basic approaches for MOVPE growth of HgCdTe,
the interdiffused multilayer process (IMP), and direct alloy growth (DAG) are compared. The paper then focuses on the progress
achieved with the IMP approach on lattice-matched CdZnTe substrates. The benefits of the precursors ethyl iodide (EI) and
tris-dimethylaminoarsenic (DMAAs) for controlled iodine donor doping and arsenic acceptor doping at dopant concentrations relevant
for HgCdTe junction devices are summarized along with the electrical and lifetime properties of n-type and p-type HgCdTe films
grown with these precursors. The relative merits of the two CdZnTe substrate orientations we have used, the (211)B and the
(100) with 4°–8° misorientation are compared, and the reasons why the (211)B is preferred are discussed. The growth and repeatability
results, based on secondary ion mass spectrometry analysis, are reported for a series of double-heterojunction p-n-N-P dual-band
HgCdTe films for simultaneous detection in the 3–5 μm and 8–10 μm wavelength bands. Finally, the device characteristics of
MOVPE-IMP in situ grown p-on-n heterojunction detectors operating in the 8–12 μm band are reviewed and compared with state-of-the-art liquid
phase epitaxial grown devices. 相似文献
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K. Maruyama H. Nishino T. Okamoto S. Murakami T. Saito Y. Nishijima M. Uchikoshi M. Nagashima H. Wada 《Journal of Electronic Materials》1996,25(8):1353-1357
(lll)B CdTe layers free of antiphase domains and twins were directly grown on (100) Si 4°-misoriented toward<011> substrates,
using a metalorganic tellurium (Te) adsorption and annealing technique. Direct growth of (lll)B CdTe on (100) Si has three
major problems: the etching of Si by Te, antiphase domains, and twinning. Te adsorption at low temperature avoids the etching
effect and annealing at a high temperature grows single domain CdTe layers. Te atoms on the Si surface are arranged in two
stable positions, depending on annealing temperatures. We evaluated the characteristics of (lll)B CdTe and (lll)B HgCdTe layers.
The full width at half maximum (FWHM) of the x-ray double crystal rocking curve (DCRC) showed 146 arc sec at the 8 |im thick
CdTe layers. In Hg1−xCdxJe (x = 0.22 to 0.24) layers, the FWHMs of the DCRCs were 127 arc sec for a 7 (im thick layer and 119 arc sec for a 17 (im
thick layer. The etch pit densities of the HgCdTe were 2.3 x 106 cm2 at 7 ^m and 1.5 x 106 cm-2 at 17 um. 相似文献
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Ⅴ族元素 As 在碲镉汞中具有较小的扩散系数,在非本征 p 型掺杂中得到广泛应用,在 p-on-n型高性能探测器及双色或多色探测器应用方面优势明显。对分子束外延掺 As 碲镉汞薄膜的几种生长技术的基本原理进行了简单介绍,并对各方法存在的优缺点进行了对比分析;同时对 As 杂质在碲镉汞材料中的掺杂形态、杂质激活退火工艺及杂质激活率等进行了总结分析。对 MBE As 掺杂在第三代多层膜结构器件的应用方面提出了建议。 相似文献
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HgCdTe是一种有广泛应用前景的半导体光电材料。从投资上看,它已成为仅次于Si和GaAs的第三种最重要的半导体。本文系统地介绍了HgCdTe材料的基本性质及HgCdTe的晶体生长,对液相外延生长HgCdTe晶体的理论和工艺问题作了较详细的论述。 相似文献