475 results about "Electroless nickel" patented technology

An organic thin film forming apparatus that can easily remove an organic thin film adhered to a surface of a deposition preventive plate. The apparatus forms an organic thin film on a substrate disposed on a surface of a substrate stage from an organic gas. An electroless nickel film containing fluorine resin is formed on the surface of a deposition preventive plate. The electroless nickel film containing fluorine resin has mold release characteristics for an organic thin film. Even if the organic thin film adheres, the organic thin film can be easily removed by a method (such as, high pressure cleaning).

Disclosed herein are a method for plating a printed circuit board and the printed circuit board manufactured therefrom. In the method, a bare soldering or wire bonding portion of a copper (Cu)- or copper alloy layer, is plated with palladium (Pd) or a palladium alloy, and then gold (Au) or a gold alloy is deposited over the palladium or palladium alloy plated layer by an electroless substitution plating process based on ionization tendency. Having superior hardness, ductility and corrosion resistance, palladium is suitable for use between a connector and a substrate and meets requirements for the printed circuit board even when applied to a low thickness, greatly reducing the process time. Accordingly, the problem of black pad, which frequently occur on electroless nickel and electroless gold finish upon surface mount technology, can be perfectly solved. Particularly, fatal bending cracks can be prevented from occurring in the rigid-flexible or flexible printed circuit boards.

A direct displacement plating process provides a uniform, adherent coating of a relatively stable metal (e.g., nickel) on a highly reactive metal (e.g., aluminum) that is normally covered with a recalcitrant oxide layer. The displacement reaction proceeds, preferably in a nonaqueous solvent, as the oxide layer is dissolved by a fluoride activator. Halide anions are used to provide high solubility, to serve as an anhydrous source of stable metal ions, and to control the rate of the displacement reaction. A low concentration of activator species and little or no solution agitation are used to cause depletion of the activator species within pores in the surface oxide so that attack of the reactive metal substrate is minimized. Used in conjunction with electroless nickel deposition to thicken the displacement coating, this process can be used to render aluminum pads on IC chips solderable without the need for expensive masks and vacuum deposition operations. Such coatings can also be used to preserve or restore wire bondability, or for corrosion protection of aluminum and other reactive structural metals and alloys. A thin layer of immersion gold can be used to protect the thickened coating from oxidation. The solderable aluminum IC chip pads provide the basis for a maskless bumping process for flip chip attachment.

The invention provides a method of plating an integrated circuit. An activation plate is positioned adjacent to at least one integrated circuit. The integrated circuit includes a plurality of bond pads comprising a bond-pad metal, and the activation plate also comprises the bond-pad metal. A layer of electroless nickel is plated on the bond pads and the activation plate, and a layer of gold is plated over the layer of electroless nickel on the bond pads and the activation plate. An integrated circuit with bond pads plated using the activation plate, and a system for plating an integrated circuit is also disclosed.

Mold tooling formed of suitable iron-nickel alloys and provided with a hard electroless nickel coating on the mold cavity surface are useful for high volume production of carbon fiber reinforced, polymer matrix, composites. The iron and nickel alloy provides thermal expansion properties for the molding of dimensionally accurate parts. The nickel alloy coating provides a durable surface, without adversely affecting the expansion properties of the mold, and remains adherent to the base metal during the repeated thermal cycling encountered in high volume production of substantially identical molded carbon composite parts.

The invention provides an integrated device with corrosion-resistant capped bond pads. The capped bond pads include at least one aluminum bond pad on a semiconductor substrate. A layer of electroless nickel is disposed on the aluminum bond pad. A layer of electroless palladium is disposed on the electroless nickel, and a layer of immersion gold is disposed on the electroless palladium. A capped bond pad and a method of forming the capped bond pads are also disclosed.

The invention discloses a chemical plating nickel plating method of neodymium-iron- boron permanent magnet material, which is characterized by the following: adopting plugging chemical plating to plug neodymium-iron-boron and thick and block-up neutral chemical plating; carrying on chemical plating nickel phosphor method of acidic high-phosphorus chemical plating, wherein the method comprises the following steps: tumbling; chamfering; degreasing; derusting; activating; plugging chemical plating; neutering chemical plating; acidifying high-phosphorus chemical plating; inactivating. The invention simplifies the application of industry, which reduces cost of production.

A method and system for electroless nickel plating of fluid flow measurement components used in oil and gas pipelines provides uniformly and consistently plating of all surfaces of the fluid flow components, including flow conditioners, with an electroless nickel plating that imparts the component with desirable characteristics related to hardness, smoothness, wear and abrasion resistance, and corrosion and oxidation resistance, such that the build up of contaminant deposits on the component is reduced and repeatable and accurately fluid flow measurements can be made.

An elevator system (20) includes idler sheaves (32, 34, 36). A coating on a load bearing member contacting surface (40) of an idler sheave reduces friction between a load bearing member (26) and the contacting surface (40). A disclosed example includes an at least partially metallic coating comprising a fluoropolymer. One disclosed example includes an electroless nickel-polytetrafluoroethylene coating.

The present invention relates, generally, to methods for joining an electronic part finished with nickel and an electronic part finished with electroless nickel, which can prevent a brittle fracture, more particularly, to a method for joining an electronic part finished with nickel and an electronic part finished with electroless nickel with a solder by controlling the composition of the solder to prevent a brittle fracture occurring at the solder joining portion.

A method for joining an electronic part finished with nickel and an electronic part finished with electroless nickel, comprising: (1) reflowing solder to a nickel portion of an electronic part finished with nickel to obtain an electronic part where an intermetallic compound and a solder are formed; (2) obtaining an electronic part finished with an eletroless nickel, of which the nickel portion is connected with the solder; and (3) solder-joining an electronic part finished with nickel obtained in the step (1) and the electronic part finished with electroless nickel obtained in the step (2).

The invention provides a formulation of medium-temperature acidic electroless nickel-phosphorus alloy, which is characterized in that the formulation is as follows: 25 to 30 grams of nickel sulfate per liter, 25 to 35 grams of sodium hypophosphite per liter, 12 to 18 grams of sodium acetate per liter, 0.5-1.3 milligrams of thiourea per liter, 7 to 13 milliliters of lactic acid per liter, 7 to 13 milliliters of acetic acid per liter, 4-10 grams of organic acid per liter, 5-16 milligrams of potassium iodide or potassium iodate per liter, and the loadage is between 0.5 and 1.5 dm<2>/L. The invention has the advantages that: the formulation improves the stability of a plating solution, obviously improves plating rate, has good corrosion resistance and the comprehensive properties of plating; the stability of the plating solution can reach over 1800 s; the stability of periodic experiments is more than ten periods; the corrosion resistance of the plating reaches over 130 s; and the hardness of the plating reaches 480 HV.

The invention relates to a method of electroless Ni-P alloy on surface of magnesium alloy, comprising following steps: (1) degreasing: the magnesium alloy is degreased in non-phosphate alkaline degreasing solution with a temperature of 55 deg C to 65 deg C; (2) acid cleaning: a mixture of organic acid and anionic surfactant is used as magnesium alloy acid cleaning solution instead of traditional chromic acid solution to remove oxide film of the surface of the magnesium alloy; (3) surface conditioning: the acid cleaned magnesium alloy is processed surface conditioning in alkaline surface conditioning solution with a temperature of 80 deg C to 100 deg C; (4) activating: the surface conditioned magnesium alloy is processed activation in HF solution; (5) acid dipping zinc; (6) nickel plating: in a condition that the temperature is 80 deg C to 90 deg C and ph value is in the range of 5 to 6, a brightener is added into electroless nickel solution to process nickel plating reaction Ni-P alloy coating. The invention has following beneficial effects: (1) reducing pollution for environment and damage for bodies of operators, and at the same time, easily controlling the operation and uneasily losing control for process parameters; (2) improving appearance of the Ni-P alloy coating, and being provided with better decorative.

The invention discloses a pretreatment solution used for an electroless nickel-phosphorus alloy plating layer on the surface of an aluminum alloy, which comprises the following components: 5-40g/L of sodium molybdate, 5-30g/L of sodium hydroxide or 10-40ml/L of ammonia and the balance of deionized water. The pretreatment solution has the following advantages that: the pretreatment solution simplifies the operation steps of nickel-phosphorus deposition to 9 steps from 15 steps, thereby being easy to realize industrialization and improving production efficiency; the pretreatment solution only consists of two substances, thereby reducing cost and improving economic benefits; the pretreatment solution does not need to adopt nitric acid for carrying out zinc withdrawal treatment, thereby avoiding the pollution and the toxication to chemical nickel plating solution, prolonging the service life of the plating solution, avoiding environmental pollution and reducing influences on the health of operation staffs; and the prepared nickel-phosphorus electroless plating layer has uniform densification, good corrosion resistance, high microhardness, firm combination with an aluminum alloy base body, good metal luster and good appearance, thereby providing a good protection effect for the aluminium alloy.

Disclosed herein are an electroless surface treatment plated layer of a printed circuit board, a method for preparing the same, and printed circuit board including the same. The electroless surface treatment plated layer includes: electroless nickel (Ni) plated coating/palladium (Pd) plated coating/gold (Au) plated coating, wherein each of the electroless nickel, palladium, and gold plated coatings has a thickness of 0.02 to 1 μm, 0.01 to 0.3 μm, and 0.01 to 0.5 μm. In the electroless surface treatment plated layer of the printed circuit board, a thickness of the nickel plated coating is specially minimized to 0.02 to 1 μm, thereby making it possible to form an optimized electroless Ni/Pd/Au surface treatment plated layer.

Electrolytic stripping solutions, which incorporate the novel use of oxoacids and/or oxoacid salts, and hydrogen peroxide, have been formulated for the rapid removal of electroless nickel from iron, steel, aluminum, and titanium alloys as well as other selected electrically conductive substrates. The formulations provide improved resistance to etching of the substrate and can be formulated to be free of chelates, chromates, nitrates, or concentrated acid solutions thereby increasing worker safety and reducing the cost of waste disposal of spent stripping solutions.

A process is disclosed for the purpose of increasing the adhesion of a polymeric material to a metal surface. The process comprises plating the metal surface with a layer of electroless nickel, electroless cobalt or electroless (or immersion) tin followed by phosphating the plated layer prior to bonding the polymeric material thereto. The process is particularly suited to treating printed circuit board inner-layers and lead frames.

A hole punch device that reduces the force required to create a hole in papers or other sheet media. A punch element of the hole punch device includes a locally sloped or indented floor to create a bend in the sheet media as it is punched to create an enlarged, oval hole. The punch pin may include an expanding sleeve surround the pin that forms a larger diameter during the cutting stroke and springs back to a smaller diameter during a pull out stroke. A coiled torsion return spring is positioned remotely from and non-coaxially with the punch pin. A keyed pin and support frame arrangement ensures a predetermined rotational orientation of the pin for sequential cutting for reduced cutting force. The pin and/or other components optionally include electroless nickel plating to reduce friction and wear at the component or pin sliding and cutting surfaces.

The invention relates to an electroless nickel plating solution and an electroless nickel plating process for a flexible printed circuit board. The electroless nickel plating solution of the present invention comprises the following components: nickel salt, calculated as Ni2+ content, is 4.5-5.5g/L; reducing agent, 15-40g/L; complexing agent, 20-100g/L Stabilizer, 0.01~10mg/L; Accelerator, 0.001~1g/L; Low stress additive, 0.01~10g/L; The low stress additive is sodium naphthalene disulfonate, sodium benzenesulfonate, saccharin, gelatin, One or more of butynediol, acetic acid, coumarin, formaldehyde, and acetaldehyde. In the chemical nickel plating process of the present invention, the temperature of the chemical nickel plating liquid is 75-90 DEG C, the pH value of the chemical nickel plating liquid is 4.5-5.4, and the chemical nickel plating time is 15-30 minutes. The electroless nickel plating solution and the electroless nickel plating process of the present invention can effectively reduce the stress of the nickel layer, improve the toughness of the nickel layer, make the nickel layer have good bending performance, and meet the production and assembly requirements of flexible printed circuit boards , to further improve the yield rate.