射频磁控溅射ZnO薄膜的微结构与光学特性

研究了膜厚对ZnO薄膜微结构和光学性能的影响。采用射频磁控溅射法在单晶硅(111)和玻璃基片上制备了不同厚度的ZnO薄膜。通过X射线衍射、原子力显微镜和紫外可见光谱对薄膜进行了表征。结果表明薄膜结晶性能良好,在(002)晶面具有明显的c轴取向。随着薄膜厚度的增加,透射率下降,吸收边红移,禁带宽度逐渐减小。     

沉积温度对Ti—B—N复合薄膜微结构及力学性能的影响

采用多靶轮流溅射技术，用Ｔｉ和六方氮化硼（ｈ－ＢＮ）反应合成了Ｔｉ－Ｂ－Ｎ薄膜，采用ＸＲＤ、ＴＥＭ和显微硬度计研究了薄膜的微结构及其力学性能。结果表明，室温下沉积的Ｔｉ－Ｂ－Ｎ薄膜为非晶体的Ｔｉ（Ｎ，Ｂ）化合物，其硬度达到ＨＫ２４７０；高温下沉积的薄膜为ＴｉＮ结构类型的Ｔｉ（Ｎ，Ｂ）晶体，薄膜在晶化后硬度略有降低。     

Ar气压强对直流脉冲磁控溅射制备Mo薄膜性能的影响

利用直流脉冲磁控溅射方法在玻璃衬底上制备太阳电池背接触Mo薄膜.通过台阶仪、四探针电阻仪、X射线衍射仪、紫外-可见分光光度计等研究了Ar气压强对薄膜结构及光电性能的影响,结果表明,在低的Ar气压强下制备的Mo薄膜晶粒尺寸较大,薄膜结晶质量好,薄膜具有优良的光电性能,Ar气压强的增加将导致薄膜的晶粒尺寸减小,薄膜结晶质量差,结构疏松,从而降低薄膜的光电性能.Ar气压强为0.4 Pa时制备薄膜的晶粒尺寸为21.02 nm,电阻率最低,为14μΩ·cm,波长190 nm-850 nm范围内的平均反射率可达到66.94%.     

BST薄膜的微结构研究

采用射频磁控溅射法在 Pt/Ti/SiO2/Si 衬底上制备了钛酸锶钡(BST)薄膜。利用 X 射线光电子能谱(XPS)、X射线衍射(XRD)分别研究了 BST 薄膜的成分、晶体结构。用优化的成膜工艺制备出成分与靶材基本一致,具有钙钛矿结构的 BST 多晶薄膜。利用扫描力显微镜中的压电模式(PFM)观察到了 BST 薄膜中的 a 畴和 c 畴,初步确定在 BST薄膜中多畴转变为单畴的临界尺寸为 28~33 nm。     

磁控溅射薄膜厚度分而模拟软件的编制

对平面磁控溅射薄膜厚度分布提出了一种理论计算模型，编制了磁控溅射薄膜厚度分布模拟软件系统ＭＦＴＤＳ，并用ＭＦＴＤＳ对半球壳形工件内外膜厚分布进行了计算机模拟，在受磁控靶溅蚀区不均匀性影响较小的部位，所得膜厚分布结果与实验数据基本吻合。     

NbN薄膜的反应磁控溅射沉积

ＮｂＮ具有较高的临界电流密度 ,较高的临界超导转变温度和良好的力学性能 ,在微电子 ,传感器 ,微机械 ,超导电子学和表面强化领域等方面有广阔的应用前景[1] 。ＮｂＮ薄膜具有高硬度 ,高耐磨性 ,耐腐蚀性[2 ] 和良好的热稳定性[3 ] ,使其成为一种重要的表面涂层材料。本文研究了氮分压对磁控反应溅射ＮｂＮ薄膜微结构和力学性能的影响。ＮｂＮ薄膜在ＳＰＣ 35 0多靶磁控溅射仪上制备 ,采用射频阴极 ,纯Ｎｂ(99 9% )靶作为Ｎｂ材料来源 ,溅射室背底真空为 5× 10 -4Ｐａ ,采用Ａｒ Ｎ2 混合气体进行反应沉积 ,其中Ａｒ分压为 0 3Ｐａ ,Ｎ2 …     

磁控溅射不同厚度铝薄膜的微结构及其表面形貌

用直流磁控溅射法在室温的Si(100)基底上制备了21～55 nm范围内不同厚度的铝膜,并用X射线衍射和扫描电镜对薄膜的结构和表面形貌进行了表征.分析结果表明:制备的铝薄膜呈多晶状态,晶粒择优取向为(111),随着膜厚的增加,Al(100)衍射峰宽变窄,薄膜的平均晶粒尺寸逐渐增大,晶面间距逐渐减小,薄膜中的残余应力减小.膜厚为55 nm时,Al膜均匀致密.     

磁控溅射薄膜厚度分布模拟软件的编制

对平面磁控溅射薄膜厚度分布提出了一种理论计算模型，编制了磁控溅射薄膜厚度分布模拟软件系统ＭＦＴＤＳ，并用ＭＦＴＤＳ对半球壳形工件内外膜厚分布进行了计算机模拟，在受磁控靶溅蚀区不均匀性影响较小的部位，所得膜厚分布结果与实验数据基本吻合     

Ag—SiO2纳米复合薄膜微结构研究

本文采用基片可旋转并利用红外灯管加热基片多靶磁控溅射台的制备了不同成分及基片温度的Ag～Sio2复合薄膜。采用XRD、TEM、SEM等手段分析了薄膜的微观组织结构，并测定了薄膜的电阻率。研究结果表明：复合薄膜的微结构由多晶富Ag区和细密的Ag晶体和非晶SiO2混合物组成；室温下随SiO2含量的增加．薄膜中金属Ag呈网状分布．晶粒细化，电阻率上升；随基片温度的升高．复合薄膜中银晶体最终聚集成孤立的纳米颗粒；与微结构相对应，薄膜的电阻率可在大范围（102～106μΩcm）内变化。     

Characteristics of ZnO thin films prepared by radio frequency magnetron sputtering

We investigated in this study structural and nanomechanical properties of zinc oxide (ZnO) thin films deposited onto Langasite substrates at 200 °C through radio frequency magnetron sputtering with an radio frequency power at 200 W in an O₂/Ar gas mixture for different deposition time at 1, 2, and 3 h. Surface morphologies and crystalline structural characteristics were examined using X-ray diffraction, scanning electron microscopy, and atomic force microscopy. The deposited film featured a polycrystalline nature, with (1 0 0), (0 0 2), and (1 0 1) peaks of hexagonal zinc oxide at 31.75°, 34.35°, and 36.31°. As the deposition time increased, the ZnO film became predominantly oriented along the c-axis (0 0 2) and the surface roughness decreased. Through Berkovich nanoindentation following a continuous stiffness measurement technique, the hardness and Young’s modulus of ZnO thin films increased as the deposition time increased, with the best results being obtained for the deposition time of 3 h. In addition, surface acoustic wave properties of ZnO thin films were also presented.     

Studies of yttrium oxide films prepared by RF magnetron sputtering

Films of yttrium oxide (Y₂O₃) were deposited on Si substrates from a Y₂O₃ target by RF magnetron sputtering. MIS capacitors in the form of Al and Y₂O₃ (400 Å)-Si were then fabricated. The leakage current density was about 10^-6 A/cm² at 1.3×10⁶ V/cm, and the breakdown field of the films was about 2.75×10⁶ V/cm. The dielectric constant of the sputtered Y₂O₃ was found to be about 12-12.7     

DC磁控溅射制备的TiNx薄膜组分及性能分析

利用DC磁控溅射法在p-Si(111)衬底上制备了TiNx薄膜.利用X射线能谱仪(EDX)、X射线衍射(XRD)、紫外/可见分光光度计、四探针电阻率测试仪等分析了薄膜的组分、结构和光电特性.结果表明,薄膜中N/Ti原子比接近于1;衬底温度对薄膜的择优取向影响显著,240℃附近是TiNx薄膜结晶择优取向由(111)向(200)转变的临界点;薄膜在近红外波段平均反射率随衬底温度的升高,先增大后减小;薄膜的电阻率随着衬底温度的升高而显著降低.     

射频磁控溅射沉积AZO透明导电膜研究

采用射频磁控溅射技术在玻璃衬底上沉积了AZO透明导电薄膜,应用灰关联-田口实验法设计了L9(34)混合直交表,研究了制程工艺对薄膜沉积速率、电阻率、光穿透率、结晶性的影响。结果表明沉积薄膜的最佳制程参数为射频功率120 W、溅射压强2 Pa、靶材-基板距离8.5 cm、薄膜沉积时间90 min;实验显示最佳制程参数下所得透明导电薄膜沉积速率为8.04 nm/min,电阻率为2.6×10–3.cm,可见光穿透率维持在84%左右。     

Magnetic properties of ZnO:Cu thin films prepared by RF magnetron sputtering

ZnO films and ZnO:Cu diluted magnetic semiconductor films were prepared by radio frequency magnetron sputtering on Si (111) substrates, with targets of ZnO and Zn0.99Cu0.01 O, respectively. The plasma emission spectra were analyzed by using a grating monochromator during sputtering. The X-ray photoelectron spectroscopy measurements indicate the existence of Zni defect in the films, and the valence state of Cu is 1. The X-ray diffraction measurements indicate that the thin films have a hexagonal wurtzite structure and have a preferred orientation along the c-axis. The vibrating sample magnetometer measurements indicate that the sample is ferromagnetic at room temperature, and the origin of the magnetic behavior of the samples is discussed.     

Properties of transparent conductive ZnO:Al thin films prepared by magnetron sputtering

Middle-frequency alternative magnetron sputtering was used to deposit transparent conductive ZAO (ZnO:Al) thin films with ZAO (98 wt%ZnO+2 wt%Al₂O₃) ceramic target on glass and Si wafers. The influences of the various deposition parameters on the structural, optical and electrical performances of ZAO films have been studied. The structural characteristics of the films were investigated by the X-ray diffractometer and atomic force microscope, while the visible transmittance, carrier concentration and Hall mobility were studied by UV-VIS and the Hall tester, respectively. The lowest resistivity obtained in the work was 4.6×10⁻⁴ Ω cm for the film with average transmittance of 90.0% within the visible wavelength range and sheet resistance of 32 Ω, which was deposited at 250 °C and 0.8 Pa.     

射频磁控溅射制备的ZnMgO薄膜结构和光学性能

采用射频磁控溅射法,在石英衬底上制备了Zn1-xMgxO(x=0.00～0.16)薄膜。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见分光光度计和光致发光(PL)光谱等分析了薄膜的结构、形貌和光学特性。结果表明:当x≤0.10时薄膜保持六角纤锌矿结构,而x=0.16时已出现MgO立方相;所有薄膜晶粒大小均匀,在100～150 nm之间;透光率在80%以上;薄膜带隙Eg与Mg含量呈线性关系;薄膜PL谱由较弱的紫外发光峰和较强的可见发光带组成,随Mg含量的增加紫外发光峰蓝移。     

射频磁控溅射法制备ZnO:Cu薄膜的磁性研究

ZnO films and ZnO：Cu diluted magnetic semiconductor films were prepared by radio frequency mag-netron sputtering on Si （111） substrates, with targets of ZnO and Zn0.99Cu0.01O, respectively. The plasma emission spectra were analyzed by using a grating monochromator during sputtering. The X-ray photoelectron spectroscopy measurements indicate the existence of Zni defect in the films, and the valence state of Cu is 1＋. The X-ray diffraction measurements indicate that the thin films have a hexagonal wurtzite structure and have a preferred orientation along the c-axis. The vibrating sample magnetometer measurements indicate that the sample is ferromagnetic at room temperature, and the origin of the magnetic behavior of the samples is discussed.     

磁控溅射技术制备织构化表面Al掺杂ZnO薄膜

以Zn-Al(Al:2wt.%)合金为溅射靶材,采用直流反应磁控溅射的方法,在普通玻璃衬底上制备Al掺杂ZnO(AZO)薄膜。通过对衬底温度的调制,在较高衬底温度下(～280℃),无需经过常规溅射后腐蚀工艺过程,即可获得表面形貌具有特征陷光结构的AZO薄膜,其表面呈现"类金字塔"状,粗糙度RMS=65.831nm。通过测试薄膜的结构特性、表面形貌及其光电性能,详细地研究了衬底温度对AZO薄膜性能的影响。X射线衍射(XRD)和扫描电子显微镜(SEM)测试表明,所有样品均为多晶六角纤锌矿结构,薄膜呈(002)晶面择优生长,其表面形貌随衬底温度的不同而改变。衬底温度为200℃及其以上工艺条件下获得的AZO薄膜,在可见光及近红外范围的平均透过率大于90%,电阻率优于1.5×10-3Ωcm。