Abstract:
The invention provides a nanostructure including an anodized film including nanoholes. The anodized film is formed on a substrate having a surface including at least one material selected from the group consisting of semiconductors, noble metals, Mn, Fe, Co, Ni, Cu and carbon. The nanoholes are cut completely through the anodized film from the surface of the anodized film to the surface of the substrate. The nanoholes have a first diameter at the surface of the anodized film and a second diameter at the surface of the substrate. The nanoholes are characterized in that either a constriction exists at a location between the surface of the anodized film and the surface of the substrate, or the second diameter is greater than the first diameter.
Abstract:
A method of manufacturing a structure with pores which are formed by anodic oxidation and whose layout, pitch, position, direction, shape and the like can be controlled. The method includes the steps of: disposing a lamination film on a substrate, the lamination film being made of insulating layers and a layer to be anodically oxidized and containing aluminum as a main composition; and performing anodic oxidation starting from an end surface of the lamination film to form a plurality of pores having an axis substantially parallel to a surface of the substrate, wherein the layer to be anodically oxidized is sandwiched between the insulating layers, and a projected pattern substantially parallel to the axis of the pore is formed on at least one of the insulating layers at positions between the pores.
Abstract:
A micromechanical component having a substrate (10) made from a substrate material having a first doping type (p), a micromechanical functional structure provided in the substrate (10) and a cover layer to at least partially cover the micromechanical functional structure. The micromechanical functional structure has zones (15; 15a; 15b; 15c; 730; 740; 830) made from the substrate material having a second doping type (n), the zones being at least partially surrounded by a cavity (50; 50e-f), and the cover layer has a porous layer (30) made from the substrate material.
Abstract:
Providing a columnar structure having a uniform shape and excellent heat resistance and mechanical strength that is formed on a substrate of silicon, a method of preparing the structure, and a DNA separation device prepared by the method. A structure has, on a substrate made of silicon, columns of which main surface is covered with a thermally oxidized film. The columns are made of the thermally oxidized film only or of the thermally oxidized film and silicon. The thermally oxidized film formed on the columns is connected to those formed on the surface or inside of the substrate.
Abstract:
The invention provides a nanostructure including an anodized film including nanoholes. The anodized film is formed on a substrate having a surface including at least one material selected from the group consisting of semiconductors, noble metals, Mn, Fe, Co, Ni, Cu and carbon. The nanoholes are cut completely through the anodized film from the surface of the anodized film to the surface of the substrate. The nanoholes have a first diameter at the surface of the anodized film and a second diameter at the surface of the substrate. The nanoholes are characterized in that either a constriction exists at a location between the surface of the anodized film and the surface of the substrate, or the second diameter is greater than the first diameter.
Abstract:
Using a p-type silicon substrate 1 having on its front surface an n-type silicon layer 2 with a thickness of twice or more of the desired thickness for the beam, an electrochemical etching is performed from the rear surface and the etching is stopped at the beam thickness which is twice or more of the desired thickness. Etching for the beam part 8 from the rear surface proceeds along with the etching for the gap part 9 from the front surface, and a desired thickness for the beam can be formed by completing the etching at the timing when the gap part is opened through.
Abstract:
Disclosed are electropolishing methods for etching a substrate in self alignment. A hole is formed in a substrate in self alignment by using an electropolishing system, wherein a reaction tube, an etchant solution, an electrode, a constant current source and the silicon substrate, said etchant solution being contained in a space confined by the reaction tube and the substrate, which is attached to one end of the reaction tube in such a way that the bottom of the substrate may be toward the interior of the space, said constant current source being connected with a metal layer formed on the substrate and the electrode. The substrate is made to be porous by flowing a constant current and etched by the action of the etchant solution while breaking the current. In addition to being economical, the methods can determine the position and size of the hole accurately and precisely. Further, neither chemical damage nor mechanical impact is generated on the substrate.
Abstract:
A method for protecting a material of a microstructure comprising said material and a noble metal layer (8) against undesired galvanic etching during manufacture comprises forming on the structure a sacrificial metal layer (12) having a lower redox potential than said material, the sacrificial metal layer (12) being electrically connected to said noble metal layer (8).
Abstract:
The invention provides a method and a device for reliable, rapid, simple, easily implementable and reproducible electrochemical microstructuring and/or nanostructuring. For this purpose, the subject of the invention is a method for electrochemically structuring a specimen (12) made of a conductive or semiconductor material and comprising two opposed faces, a front face (11) and a rear face (13). The method comprises the steps consisting: in bringing at least the front face (11) of the specimen (12) into contact with at least one electrolytic solution (4) stored in at least one reservoir (3); in placing at least one counterelectrode (6) in the electrolyte (4) opposite the front face (11) of the specimen (12) that has to be structured; in placing at least one working electrode (7) in dry ohmic contact with the rear face (13) of the specimen (12), said working electrode having structuring features (14); and in applying an electric current between the two electrodes in order to obtain an electrochemical reaction at the interface between the front face (11) of the specimen (12) and the electrolyte (4), with a current density that is modulated by the structuring features (14) of the working electrode (7) in order to etch material from or deposit material on the front face (11) of the specimen (12).