阅读说明：本技术 一种具有氮化镁壳层的氧化亚铜/锌铜氧/氧化锌器件 (Cuprous oxide/zinc-copper oxide/zinc oxide device with magnesium nitride shell ) 是由 凤天宏 于 2019-09-30 设计创作，主要内容包括：本发明属于半导体器件技术领域,提供了一种具有氮化镁壳层的氧化亚铜/锌铜氧/氧化锌器件,包括氧化锌薄层、氧化亚铜薄层、锌铜氧超薄层和氮化镁层。该多层异质结构的辐射探测器,能够充分发挥氧化锌材料在辐射探测方面的耐高温耐辐照的特性,通过引入具有空穴导电特性的氧化亚铜层,克服氧化锌难以获得稳定空穴导电特性的严重劣势,进而形成基于PN结构的结型辐射探测器件。(The invention belongs to the technical field of semiconductor devices, and provides a cuprous oxide/zinc-copper-oxygen/zinc oxide device with a magnesium nitride shell layer. The radiation detector with the multilayer heterostructure can fully play the characteristics of high temperature resistance and radiation resistance of a zinc oxide material in the aspect of radiation detection, overcomes the serious disadvantage that zinc oxide is difficult to obtain stable hole conduction characteristics by introducing a cuprous oxide layer with hole conduction characteristics, and further forms a junction type radiation detection device based on a PN structure.)

1. A cuprous oxide/zinc copper oxide/zinc oxide device with a magnesium nitride shell is characterized in that the cuprous oxide/zinc copper oxide/zinc oxide device with the magnesium nitride shell comprises a zinc oxide thin layer, a cuprous oxide thin layer, a zinc copper oxide ultrathin layer and a magnesium nitride layer;

the zinc oxide thin layer is a truncated cone with a trapezoidal section, and the thickness of the zinc oxide thin layer is 300 mu m; the upper surface of the zinc oxide thin layer is a zinc oxide single crystal zinc polarization surface with the diameter of 10 mm; the lower surface of the zinc oxide thin layer is a zinc oxide single crystal oxygen polarization surface with the diameter of 12 mm;

the zinc-copper-oxygen ultrathin layer is positioned on a zinc polarization surface of the zinc oxide single crystal, and is a circular table with the diameter of 10mm and the thickness of 3 nm-10 nm; the circle center of the zinc-copper-oxygen ultrathin layer is superposed with the circle center of the zinc oxide single crystal zinc polarization surface;

the cuprous oxide thin layer is positioned on the zinc-copper oxide ultrathin layer, and the diameter of the cuprous oxide thin layer is 10mm, and the thickness of the cuprous oxide thin layer is 0.1-2 mu m; the center of the cuprous oxide thin layer is superposed with the center of the zinc polarization plane of the zinc oxide single crystal;

the upper surface of the cuprous oxide thin layer, the oxygen polarization surface of the zinc oxide single crystal and the side surface of the device are magnesium nitride layers, and the thickness of the magnesium nitride layers is 10 nm-100 nm;

a hole with the diameter of 8-10 mm is formed in the magnesium nitride layer on the cuprous oxide thin layer side, cuprous oxide is exposed, and the circle center of the hole is superposed with the circle center of the zinc polarization surface of the zinc oxide single crystal; the opening of the cuprous oxide thin layer is connected with a circular Ni/Au ohmic contact electrode, the diameter is 8-10 mm, the center of the circle coincides with the center of the opening, the thickness of the Ni electrode is 10-200 nm, and the thickness of the Au electrode is 0.01-1 μm;

a hole with the diameter of 8-12 mm is formed in the magnesium nitride layer on the oxygen polarization surface side of the zinc oxide single crystal, zinc oxide is exposed, and the circle center of the hole is superposed with the circle center of the oxygen polarization surface of the zinc oxide single crystal; the opening on the oxygen-polarized surface side of the zinc oxide single crystal is connected with a circular Al/Au ohmic contact electrode, the diameter of the circular Al/Au ohmic contact electrode is 8-12 mm, the center of the circular Al/Au ohmic contact electrode coincides with the center of the opening, the thickness of the Al electrode is 10-200 nm, and the thickness of the Au electrode is 0.01-1 μm.

Technical Field

The invention belongs to the technical field of semiconductor devices, and particularly provides a cuprous oxide/zinc-copper oxide/zinc oxide device with a magnesium nitride shell.

Background

The wide-bandgap semiconductor zinc oxide material has the outstanding advantages of large forbidden bandwidth, high breakdown field strength, good anti-radiation performance and the like, and has potential application in the aspect of radiation detection. At present, one of the important factors restricting the application of the zinc oxide-based device is the lack of zinc oxide material with hole conduction property. Cuprous oxide is a semiconductor oxide with hole conduction characteristic, and the development of a novel device based on a cuprous oxide film and a zinc oxide single crystal is expected to meet the application requirement of the novel device in the radiation detection field. Meanwhile, the zinc-copper-oxygen ultrathin layer is added in the device, so that the capture of the device interface on current carriers can be reduced by utilizing the polarization induction effect generated by the zinc-copper-oxygen ultrathin layer, and the electrical property of the device can be improved; in addition, a magnesium nitride shell layer is added around the device, so that the problem of electric leakage of the device can be effectively solved by utilizing the high-resistance characteristic of the magnesium nitride shell layer and an inversion layer formed on the side surface of the ZnO single crystal, the leakage current noise of the device is reduced, and the performance of the device is obviously improved.

Disclosure of Invention

The invention aims to solve the problems of single structure and large electric leakage of the existing zinc oxide-based radiation detector, and provides a cuprous oxide film/zinc-copper oxygen ultrathin layer/zinc oxide single crystal device structure with a magnesium nitride protective shell layer.

The technical scheme of the invention is as follows:

a cuprous oxide/zinc-copper-oxygen/zinc oxide device with a magnesium nitride shell layer comprises a zinc oxide thin layer, a cuprous oxide thin layer, a zinc-copper-oxygen ultrathin layer and a magnesium nitride layer;

the zinc oxide thin layer is a truncated cone with a trapezoidal section, and the thickness of the zinc oxide thin layer is 300 mu m; the upper surface of the zinc oxide thin layer is a zinc oxide single crystal zinc polarization surface with the diameter of 10 mm; the lower surface of the zinc oxide thin layer is a zinc oxide single crystal oxygen polarization surface with the diameter of 12 mm;

the zinc-copper-oxygen ultrathin layer is positioned on a zinc polarization surface of the zinc oxide single crystal, and is a circular table with the diameter of 10mm and the thickness of 3 nm-10 nm; the circle center of the zinc-copper-oxygen ultrathin layer is superposed with the circle center of the zinc oxide single crystal zinc polarization surface;

the cuprous oxide thin layer is positioned on the zinc-copper oxide ultrathin layer, and the diameter of the cuprous oxide thin layer is 10mm, and the thickness of the cuprous oxide thin layer is 0.1-2 mu m; the center of the cuprous oxide thin layer is superposed with the center of the zinc polarization plane of the zinc oxide single crystal;

the upper surface of the cuprous oxide thin layer, the oxygen polarization surface of the zinc oxide single crystal and the side surface of the device are magnesium nitride layers, and the thickness of the magnesium nitride layers is 10 nm-100 nm;

a hole with the diameter of 8-10 mm is formed in the magnesium nitride layer on the cuprous oxide thin layer side, cuprous oxide is exposed, and the circle center of the hole is superposed with the circle center of the zinc polarization surface of the zinc oxide single crystal; the opening of the cuprous oxide thin layer is connected with a circular Ni/Au ohmic contact electrode, the diameter is 8-10 mm, the center of the circle coincides with the center of the opening, the thickness of the Ni electrode is 10-200 nm, and the thickness of the Au electrode is 0.01-1 μm;

a hole with the diameter of 8-12 mm is formed in the magnesium nitride layer on the oxygen polarization surface side of the zinc oxide single crystal, zinc oxide is exposed, and the circle center of the hole is superposed with the circle center of the oxygen polarization surface of the zinc oxide single crystal; the opening on the oxygen-polarized surface side of the zinc oxide single crystal is connected with a circular Al/Au ohmic contact electrode, the diameter of the circular Al/Au ohmic contact electrode is 8-12 mm, the center of the circular Al/Au ohmic contact electrode coincides with the center of the opening, the thickness of the Al electrode is 10-200 nm, and the thickness of the Au electrode is 0.01-1 μm.

The invention has the beneficial effects that: the radiation detector with the multilayer heterostructure can fully play the characteristics of high temperature resistance and radiation resistance of a zinc oxide material in the aspect of radiation detection, overcomes the serious disadvantage that zinc oxide is difficult to obtain stable hole conduction characteristics by introducing a cuprous oxide layer with hole conduction characteristics, and further forms a junction type radiation detection device based on a PN structure. Particularly, in the device structure, the zinc-copper-oxygen ultrathin layer is added, and the polarization induction effect generated by the zinc-copper-oxygen ultrathin layer is utilized to reduce the capture of the device interface to current carriers and improve the electrical performance of the device; meanwhile, the zinc oxide single crystal is designed into a truncated cone with a trapezoidal section, a magnesium nitride shell layer is added around the device, and the problem of electric leakage of the device is effectively solved by utilizing the high-resistance characteristic and an inversion layer formed on the side surface of the ZnO single crystal, so that the leakage current noise of the device is reduced, and the performance of the device is remarkably improved.

Drawings

FIG. 1 is a schematic side view of a zinc oxide single crystal.

FIG. 2 is a schematic top view of a zinc oxide single crystal.

Fig. 3 is a schematic diagram of a structure having a layer of zinc copper oxide, cuprous oxide and magnesium nitride.

Fig. 4 is a schematic diagram of a device structure.

In the figure: 1 zinc oxide single crystal zinc polarization plane; 2, zinc oxide single crystal side; 3, zinc-copper-oxygen ultrathin layer; 4, a thin cuprous oxide layer; 5 a magnesium nitride layer; 6Ni/Au electrodes; 7Al/Au electrode.

Detailed Description

The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.