摘要:
The present invention provides a method for suppressing transient enhanced diffusion of ion implanted dopants in a semiconductor substrate comprising bombarding the substrate in a vacuum with a beam of bubble-forming ions at a first temperature, a first energy, and a first ion dose sufficient to form a dispersion of bubbles at a depth equivalent to a peak of damage distribution in the substrate from implantation of dopant ions into the substrate in a vacuum at a second temperature, a second energy, and a second ion dose, said dispersion being sufficient to reduce said damage distribution.
摘要:
The present invention provides a new class of precursors for forming an improved diamond-like carbon coating on a workpiece. The precursors of the present invention are paraxylylenes, preferably dimers of paraxylylene, which are solid at room temperature and which will vaporize, pyrolize to substantially monomeric form, condense onto a workpiece, and spontaneously polymerize to form a "parylene" film which is free of precursor droplets and absorbed water. Upon bombardment with an ion beam, the parylene film is converted into a uniform, pinhole-free DLC coating.
摘要:
The present invention relates to an ion beam assisted method of producing a diamond like carbon (DLC) coating on the surface of a material. More particular, the invention relates to an ion beam assisted method using a fullerene precursor to produce a DLC coating, wherein the chemical composition of the ion beam and precursor are selectively chosen to determine the physical properties of the DLC coating.
摘要:
A process for hardening the surface of a metal body in which the surface is first bombarded with ions capable of occupying interstitial sites in its crystal lattice, then a coating of a reactive metal is deposited on the surface, and finally the coating is bombarded with ions which will react with it to form a hard material such as a carbide or nitride. The bombardment is continued until the hard material has become embodied in the surface by means of radiation enhanced diffusion.
摘要:
A process for manufacturing gallium arsenide devices in which regions of high resistivity are created in the gallium arsenide by subjecting the regions to bombardment by protons and then by deuterons, and devices so made.
摘要:
A method and apparatus for a prosthesis. At least a portion of the prosthesis is made from a ceramic that is treated with ion implantation, which causes a controllable, bilateral compressive stress of the ceramic. A diamond-like-coating (DLC) can be coated on the ceramic and in the same chamber as the ion implantation. After treating by ion implantation and coating with DLC, the ceramic will be strengthened and have a low coefficient of friction and thereby be made much less likely to fracture under load.
摘要:
Fuel cell electrodes comprising a minimal load of catalyst having maximum catalytic activity and a method of forming such fuel cell electrodes. The preferred method comprises vaporizing a catalyst, preferably platinum, in a vacuum to form a catalyst vapor. A catalytically effective amount of the catalyst vapor is deposited onto a carbon catalyst support on the fuel cell electrode. The electrode preferably is carbon cloth. The method reduces the amount of catalyst needed of a high performance fuel cell electrode to about 0.3 mg/cm2 or less, preferably to about 0.1 mg/cm2. The electrocatalytic layer formed comprises unique, rod-like structures.
摘要翻译:包括具有最大催化活性的催化剂负载最小的燃料电池电极和形成这种燃料电池电极的方法。 优选的方法包括在真空中蒸发催化剂,优选铂,以形成催化剂蒸气。 将催化有效量的催化剂蒸气沉积在燃料电池电极上的碳催化剂载体上。 电极优选为碳布。 该方法将高性能燃料电池电极所需的催化剂的量减少至约0.3mg / cm 2或更低,优选至约0.1mg / cm 2。 所形成的电催化层包含独特的棒状结构。
摘要:
An amorphous carbon film, preferably disposed on and substantially filling the pores in a porous anodized aluminum outer surface, wherein the amorphous carbon film comprises as an integral component an effective amount of a lubricity-increasing agent, preferably sulfur.
摘要:
The present invention provides a process of forming an antimicrobial coating on a surface of a medical implant, the coating comprising an antimicrobially effective amount of antimicrobial metal atoms incorporated into a coating of amorphous carbonaceous material.
摘要:
Fuel cell electrodes comprising a minimal load of catalyst having maximum catalytic activity and a method of forming such fuel cell electrodes. The method comprises vaporizing a catalyst, preferably platinum, in a vacuum to form a catalyst vapor. A catalytically effective amount of the catalyst vapor is deposited onto a carbon catalyst support on the fuel cell electrode. The electrode preferably is carbon cloth. The method reduces the amount of catalyst needed for a high performance fuel cell electrode to about 0.3 mg/cm.sup.2 or less.
摘要翻译:包括具有最大催化活性的催化剂负载最小的燃料电池电极和形成这种燃料电池电极的方法。 该方法包括在真空中蒸发催化剂,优选铂,以形成催化剂蒸气。 将催化有效量的催化剂蒸气沉积在燃料电池电极上的碳催化剂载体上。 电极优选为碳布。 该方法将高性能燃料电池电极所需的催化剂量减少至约0.3mg / cm 2或更低。