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  • Release time: 2018 - 03 - 12
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
  • Release time: 2018 - 03 - 13
    A new type of AAO product (V-shape AAO) is developed by Topmembranes Technology. Compared to other anodic alumina membranes products, this profile of type of AAO is precisely tailored by the synergistic control of anodizing time, etching time and cyclic times, resulting in a unique structure for a wide range of applications.For more applications of V-shape AAO, please refer to: Adv. Mater. 2014, 26, 2805;ACS Nano, 2015, 9, 10287;Adv. Funct. Mater. 2017, 27, 1604720;Nanoscale Research Letters 2013, 8,268;J. Phys. Chem. C 2017, 121, 9757; Nano Energy, 2016, 22, 539; ACS Nano 2017, 11, 5113. ...
  • Release time: 2018 - 03 - 13
    AAO on Al substrate has honeycomb-like structure (shown in Fig. 1), composed with hexagon column of Al2O3, with a circular pore in the center. At the end of the pore, there is a half-sphere shape barrier layer oxide layer in contact with aluminum. The porous oxide film contains mutually parallel cylindrical pores extending from the barrier oxide layer to the film surface. AAO on Al substrate is the simplest product in AAO family, which can be fabricated into large area with a high success rate. Fig. 2 shows a typical picture of the AAO template.Fig. 1. Schematic of AAO on Al substrate.  F...
  • Release time: 2018 - 03 - 13
    Isotropic AAO templates, often referring to thicker AAO to be different from ultrathin AAO membrane, are widely used for a number of different fields. Topmembranes technology is specialized to make high quality isotropic AAO templates, with highly uniform and regular pore on both sides of the surfaces. The pores are arranged hexagonally within the single grains of the aluminum. The translucent nature of AAO is appealing to applications in biomedical field.Fig. 1. The structure diagram of isotropic AAO templates.Fig. 2. Typical SEM images of both sides of isotropic AAO template. Fig. 3. Ty...
  • Release time: 2018 - 03 - 13
    An sprayer, or airbrush, is an ideal tool for applying a thin layer of material on the substrate.We sell this for your convenience, the price of all set is less than $50. Depending on the amount of your purchase of other product, this airbrush can be free for your use.
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Address : Tingwei Industrial Park, 6 Liufang Rd., Baoan District

Product Name

AAO on Si substrate

Date: 2018-12-27
Author: 17

AAO on Si substrate

Fig. 1. In-situ fabrication of AAO templates on silicon wafers: (left) 2 inches, (right) 4 inches. 


The preparation of AAO template by using high purity aluminium sheet has the advantages of good uniformity and good operability. However, the AAO template prepared from high purity aluminium sheet is difficult to be compatible with semiconductor technology, and it is not easy to obtain more precise and controllable micro-structures and micro-devices. Moreover, the ultra-thin AAO template prepared by aluminium sheet is easy to form wrinkles when transferred to the substrate, and the adsorption force is not strong, and the local area is weak. There may be disengagement. In order to remedy the above shortcomings, in-situ growth of AAO on substrates has been rapidly developed in recent years. The basic principle is to evaporate aluminium on the substrate and then prepare AAO, which is called AAO on substrate.

AAO on Si substrate

Figure 2. SEM diagram of AAO on Si substrate.


A silicon AAO product is introduced, as shown in Figure 1. There are two standard size silicon wafers, 2 inch and 4 inch. At present, the pore size can be adjusted from 30nm to 70nm (typical pore size is 30nm, 40nm, 60nm, 70nm), and the film thickness is about 500nm. As shown in Figure 2. Because the thickness of evaporated aluminium on silicon wafer can not be too thick, the pore arrangement and pore size uniformity of AAO prepared from thicker aluminium wafer are poor, but because of in-situ evaporation and growth, the bonding force between AAO and silicon wafer is very high, and the surface of AAO has no wrinkles and macro-fluctuations. At present, there is still a barrier layer at the bottom of the AO hole on the surface of silicon wafer. The through-hole product without barrier layer will be launched soon, please look forward to it.

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