Abstract:
Beam-induced deposition decomposes a precursor at precise positions on a surface. The surface is processed to provide linker groups on the surface of the deposit, and the sample is processed to attach nano-objects to the linker groups. The nano-objects are used in a variety of application. When a charged particle beam is used to decompose the precursor, the charged particle beam can be used to form an image of the surface with the nano-objects attached.
Abstract:
A system for beam-induced deposition or etching, in which a charged particle or laser beam can be directed to a work piece within a single vacuum chamber, either normally incident or at an angle. Simultaneously with beam illumination of the work piece, a deposition or etch precursor gas is co-injected or premixed with a purification compound and (optionally) a carrier gas prior to injection into the process chamber. The beam decomposes the deposition precursor gas to deposit a film only in areas illuminated by the beam, or decomposes the etch precursor gas to etch a film only in areas illuminated by the beam. Undesired impurities such as carbon in the deposited film are removed during film growth by interaction with adsorbed species on the work piece surface that are generated by interaction of the beam with adsorbed molecules of the film purification compound. Alternatively, the film purification compound can be used to inhibit oxidation of the material etched by the etch precursor gas. By co-injecting or premixing the deposition or etch precursor gas and film purification compound prior to injection, the deposition or etch process may be optimized with respect to growth/etch rate and achievable material purity.
Abstract:
A method and system for creating a substantially planar face in a substrate, the method including directing one or more beams at a first surface of a substrate to remove material from a first location in the substrate, the beam being offset from a normal to the first surface by a nonzero curtaining angle; sweeping the one or more beams in a plane that is perpendicular to the first surface to mill one or more initial cuts in the substrate, the initial cuts exposing a second surface that is substantially perpendicular to the first surface; rotating the substrate through a nonzero rotation angle about an axis other than an axis that is normal to the first beam or parallel to the first beam; directing the first beam at the second surface to remove additional material from the substrate without changing the first nonzero curtaining angle; and scanning the one or more beams in a pattern across the second surface to mill one or more finishing cuts in the substrate.
Abstract:
An improved method of beam deposition to deposit a low-resistivity metal. Preferred embodiments of the present invention use a novel focused ion beam induced deposition precursor to deposit low-resistivity metallic material such as tin. Applicants have discovered that by using a methylated or ethylated metal such as hexamethylditin as a precursor, material can be deposited having a resistivity as low as 40 µΩ·cm.
Abstract:
A micromachining process includes exposing the work piece surface 306 to a precursor gas comprising at least one compound selected from the group consisting of oxalyl halides, acetyl chloride and acetyl bromide; and irradiating the work piece surface with a beam in the presence of the precursor gas, the precursor gas reacting in the presence of the particle beam to remove material 304 from the work piece surface. The application also concerns a charged particle beam system adapted to carry out the process.
Abstract:
A process for deposition of high purity metal or metal oxide nano layers comprising: directing a precursor fluid toward a substrate surface, and irradiating the substrate surface with a focused ion beam in the presence of the precursor fluid, the precursor fluid dissociating in the presence of the particle beam to deposit a metal or metal oxide on the substrate surface, characterized in that the focused ion beam comprises hydrogen or oxygen ions, and shaped nano layers of high purity metal obtainable by said process.
Abstract:
An improved method of beam deposition to deposit a low-resistivity metal. Preferred embodiments of the present invention use a novel focused ion beam induced deposition precursor to deposit low-resistivity metallic material such as tin. Applicants have discovered that by using a methylated or ethylated metal such as hexamethylditin as a precursor, material can be deposited having a resistivity as low as 40 µΩ·cm.
Abstract:
A cluster source producing a beam of charged clusters 108 is used to assist charged particle beam processing on a work piece 112. For example, a protective layer is applied using a cluster source and a precursor gas, the gas being supplied by a gas injection system 104. The large mass of the cluster and the low energy per atom or molecule in the cluster restricts damage to within a few nanometers of the surface of the work piece. Fullerenes or clusters of fullerenes, bismuth, gold or Xe can be used with a precursor gas to deposit material onto a surface, or can be used with an etchant gas to etch the surface. Clusters can also be used to deposit material directly onto the surface to form a protective layer for charged particle beam processing or to provide energy to activate an etchant gas. An additional charged particle beam 107 can assist in machining the work piece when e.g. a protective layer is applied.
Abstract:
A micromachining process includes exposing the work piece surface 306 to a precursor gas comprising at least one compound selected from the group consisting of oxalyl halides, acetyl chloride and acetyl bromide; and irradiating the work piece surface with a beam in the presence of the precursor gas, the precursor gas reacting in the presence of the particle beam to remove material 304 from the work piece surface. The application also concerns a charged particle beam system adapted to carry out the process.