Abstract:
Methods and apparatus for forming apertures in a solid state membrane using dielectric breakdown are provided. In one disclosed arrangement a plurality of apertures are formed. The membrane comprises a first surface area portion on one side of the membrane and a second surface area portion on the other side of the membrane. Each of a plurality of target regions comprises a recess or a fluidic passage opening out into the first or second surface area portion. The method comprises contacting all of the first surface area portion of the membrane with a first bath comprising ionic solution and all of the second surface area portion with a second bath comprising ionic solution. A voltage is applied across the membrane via first and second electrodes in respective contact with the first and second baths comprising ionic solutions to form an aperture at each of a plurality of the target regions in the membrane.
Abstract:
A method for a textured surface on a chamber component is provided and includes providing a chamber component, applying a Iayer of a photoresist to a surface of the chamber component, exposing a portion of the photoresist to optical energy using a m ask to cure a portion of the photoresist, removing uncured photoresist from the surface, and electrochemically etching the chamber component to form a textured surface on the chamber component.
Abstract:
An example provides a method including sputtering a metal catalyst onto a substrate, exposing the substrate to a solution that reacts with the metal catalyst to form a plurality of pores in the substrate, and etching the substrate to remove the plurality of pores to form a recess in the substrate.
Abstract:
An ionic liquid ion source can include a microfabricated body including a base and a tip. The body can be formed of a porous material compatible with at least one of an ionic liquid or room-temperature molten salt. The body can have a pore size gradient that decreases from the base of the body to the tip of the body, such that the at least one of an ionic liquid or room-temperature molten salt is capable of being transported through capillarity from the base to the tip.
Abstract:
Electrochemical etching tailors topography of a nanocrystalline or amorphous metal or alloy, which may be produced by any method including, by electrochemical deposition. Common etching methods can be used. Topography can be controlled by varying parameters that produce the item or the etching parameters or both. The nanocrystalline article has a surface comprising at least two elements, at least one of which is metal, and one of which is more electrochemically active than the others. The active element has a definite spatial distribution in the workpiece, which bears a predecessor spatial relationship to the specified topography. Etching removes a portion of the active element preferentially, to achieve the specified topography. Control is possible regarding: roughness, color, particularly along a spectrum from silver through grey to black, reflectivity and the presence, distribution and number density of pits and channels, as well as their depth, width, size. Processing parameters that have been correlated in the Ni-W system to topography features include, for both the deposition phase and the etching phase of a nanocrystalline surface: duty cycle, current density, deposition duration, plating chemistry, polarity ratio. The relative influence of the processing parameters can be noted and correlated to establish a relationship between values for processing parameters and degree of topography feature. Control can be established over the topography features. Correlation can be made for any such system that exhibits a definite spatial distribution of an active element that bears a predecessor spatial relationship to a desired topography feature.
Abstract:
Die Erfindung betrifft ein Verfahren zum Beschichten eines mit Öffnungen versehenen Bauteils (1), bei dem eine MCrAlY- Beschichtung (3) flächig auf das Bauteil (1) aufgebracht wird und die MCrAlY-Beschichtung (3a-c) lokal im Bereich der Öffnungen (2a-c) elektrochemisch entfernt wird, wobei die MCrAlY-Beschichtung (3a-c) im Bereich der Öffnungen (2a-c) vor dem elektrochemisch Entfernen mit einer aluminiumhaltigen Paste (4) bedeckt und einer Wärmebehandlung unterzogen wird, so dass durch Diffusion der Aluminiumgehalt der MCrAlY-Beschichtung (3a-c) im Bereich der Öffnungen (2a-c) im Vergleich zu dem der restlichen MCrAlY-Beschichtung (3) erhöht wird und die MCrAlY-Beschichtung (3a-c) im Bereich der Öffnungen (2a-c) anschließend selektiv elektrochemisch entfernt wird.
Abstract:
A metal processing method includes etching to remove material from a thin metal part. A pattern of etch resistant material is used to prevent etching of the metal in desired locations. The etch resistant material is intentionally applied to unclean surfaces so that an adhesion between the etch resistant material and the metal will fail during the etching process. An edge is formed during etching at the boundaries of the pattern of the etch resistant material. These edges are rounded where the adhesion fails. A shaver foil is produced using the described metal processing method including a face side, a cutter side and a plurality of whisker holes. A face edge is formed where an etched profile of the whisker hole meets the face side and a cutter edge is formed where the etched profile of the whisker hole meets the cutter side. The face edge is rounded using the aforementioned process and the cutter edge is sharp using a conventional etch resistant material application method.
Abstract:
The present invention relates to an apparatus having a nanodevice (1) for controlling the flow of charged particles in an electrolyte. Such apparatus comprises an electrolytic bath container (2) divided by a polymeric membrane foil (3) into a first (4) and a second compartment (5), wherein each compartment (4, 5) comprises an electrode (6, 7) connected to a voltage supply (8). Further the apparatus comprises at least one asymmetric pore (9) forming a via hole through said foil (3), wherein said pore (9) provides a narrow opening (10) of a diameter in the range of several nanometers down to about one nanometer on a front side (11) of said foil (3) and a wide opening (12) in the range of several ten nanometers up to several hundred nanometers on a back side (13) of said foil (3). Further, the apparatus comprises an electrically conductive layer (14) surrounding said narrow opening (10) on said front side (11) and a gate voltage supply (15) connected to said electrically conductive layer (14) on said front side (11) of said foil (3) controlling the flow of charged particles within said nanodevice (1) from said first compartment (4) to said second compartment (5) vice versa. The invention further relates to a method for producing such a nanodevice (1).