摘要:
This invention relates to hydrazine fuel cell electrodes employing nickel boride as a catalyst and used with aqueous potassium hydroxide electrolytes. More particularly, this invention relates to contacting the nickel boride with a hydrogen atmosphere for a time and temperature sufficient to retard degradation of its effectiveness upon continued exposure to aqueous potassium hydroxide and to thereby extend the useful life of electrodes made therefrom.
摘要:
Disclosed is a method for encapsulating one or more discrete semiconductor chips to expose one surface thereof for metallization. The method includes forming a layer of a soft metal to overlie a relatively large substrate, pressing a surface of each discrete semiconductor chip into the soft metal and then encapsulating the semiconductor chip with suitable encapsulating material. The substrate and soft metal layer attached thereto are then removed from the encapsulated semiconductor chip exposing a surface of the chip. In one embodiment a heat sink is electroplated to the chip and the encapsulating material is removed, leaving a discrete semiconductor chip. In a different embodiment, the encapsulated semiconductor chip is utilized as a part of an integrated circuit.
摘要:
An electroforming process for manufacturing microparts comprises forming a mold cavity having the configuration of the desired micropart in a resin plate, lining the interior of the mold cavity with an electrically conductive material, attaching a lead wire to the electrically conductive material, immersing the mold cavity in an electrolytic bath, supplying dc electric energy to the lead wire to electrodeposit a metal layer of substantially uniform thickness and which comprises the micropart within the mold cavity, removing the electroformed micropart from the mold cavity, and finally removing excess portions of the electrodeposited material to obtain a finished micropart. To ensure uniform thickness of the electrodeposited material, the ratio of the height of the side wall to the width of the bottom wall of the mold cavity is preferably maintained at a value less than 3:1.
摘要:
A process for electroforming a nickel copper alloy by utilization of a nickel anode in an electrolyte solution containing copper, nickel and boric acid.
摘要:
A process for producing a solid lubricant self-supplying-type co-deposited metal film in which fine powder of inorganic polymer of graphite fluoride is dispersed in a metal plating bath in the presence of a co-deposition assisting surfactant having C - F bond in molecules selected from the group comprising cationic surfactants, nonionic surfactants and amphoteric surfactants which exhibit cationic characteristic at the pH value of a particular plating bath employed with or without levelling and brilliance imparting agents and a metal coating or film is deposited on a substrate so as to co-deposit graphite fluoride in the metal coating. A mechanical part having a graphite fluoride co-deposited metal coating thereon produced by the process. A metal plating bath employed in the process.
摘要:
A printing screen useful in silk screen printing art is produced by electrodepositing a layer of nickel onto a copper base and then depositing an alloy of tin and lead over the nickel followed by pressing a stainless steel screen into the alloy layer at the melting temperature of the alloy so as to laminate the screen to the nickel layer. The copper base is then etched away leaving only the nickel supported screen. The particular pattern to be printed is originally formed in plating resist on the copper base so as to exclude nickel from the areas of the screen corresponding to the pattern.
摘要:
A PRINTING SCREEN COMPRISED OF A METAL BASE AND A TAFFETA WOVEN OR KNIT FABRIC FACE IN SLEEVE FROM WHERE THE BASE IS DEFINED BY AN ELECTO-DEPOSITED SLEEVE HAVING A PATTERN OF HOLES CHEMICALLY ETCHED THEREIN, AND WHERE THE FABRIC FACE IS STRETCHED OR HEAT-SHRUNK OVER THE METAL BASE AND LOCKEDIN PLACE BY A PLATING OF METAL ONTO THE OUTER SURFACE OF THE BASE.
摘要:
A PROCESS FOR THE PRODUCTION OF ROCKET COMBUSTION CHAMBERS AND THRUST NOZZLE ASSEMBLIEES HAVING LENGTHWISE COOLING CHANNELS. THE PROCESS CONSISTS OF THE FOLLOWING STEPS: (1) CUTTING THE NEGAATIVE FORM OF THE COOLING CHANNELS INTO THE SURFACE OF A SUITABLE CORE, (2) GALVANICALLY DEPOSITING A FIRST LAYER ON THE CORE SURFACE TO PROVIDE THE INNER WALL OF THE ROCKET COMBUSTION CHAMBER AND THRUST NOZZLE ASSEMBLY SAID INNER WALL ALSO DEFINING SAID COOLING CHANNELS,
(3) FILLING THE COOLING CHANNELS EXTERNALLY WITH AN ELECTRICALLY CONDUCTIVE FILL MATERIAL, AND (4) GALVANICALLY DEPOSITING A SECOND LAYER ON SAID FIRST LAYER AND THE FILL MATERIAL TO PROVIDE A SMOOTH EXTERNAL WALL FOR THE ROCKET COMBUSTION CHAMBER AND THRUST NOZALE ASSEMBLIES.
摘要:
A repairable master negative and a process for producing a master negative suitable for the production of a number of perforated foils and for regenerating such a master negative when it is worn, comprising applying insulating material to one surface of a metallic base plate that is stable in a bath of an alkali at selected areas thereof which conform with the perforations in the foils to be produced, applying a coating of a metal which is erodable in a bath of an alkali which is built up on the metallic base plate after the insulating areas have been applied to it, and passivating the metallic coating. When the master negative is worn due to the production of a number of perforated foils, it is repaired by stripping off electrolytically in a bath of an alkali the metallic coating and a new metallic coating is electrodeposited on the metallic base plate without disturbing the insulated areas.
摘要:
A process for producing a cutting foil for dry shavers in which a bearing metal is provided on the underside thereof to minimize wear and friction between the foil and a cutter blade.