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Metal Working/
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Manufacture and sale (High-density, ・IC testers and ・Optical communications （Watch accessories） (Metalworking) (Processing of parts) |
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Thanks to our vast know-how in precious-metal plating, acquired through years in the exterior plating of watches, as well as our expertise in functional plating accumulated through years as a maker of high-density, super-multi-layer printed circuit boards, we can deliver your product with quick turnaround at the appropriate price, with the assurance of reliable surface treatment and thorough quality control. We can handle any product requiring surface treatment by tapping the resources of our Metalworking Division and cooperating factories, thus providing a one-stop service that encompasses all the steps from machining to surface treatment. Yamamoto Manufacturing heips you to save costs and manage man-hours more effectively.
Please contact us for a consultation.
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Overview of Products
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Plating has the effect of adding new functions and greater values to the material surface of essential manufactured products. Surface treatment plays an integral role in technologies that ensure corrosion resistance, wear resistance, hardness,electric conductivity, soldering, light reflectivity and other desired properties of precision and high-tech equipment. We propose surface based on our accumulated technologies and know-how. |
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Name of plating type |
Plating thickness |
Functions/application |
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Electroless Ni-P－Au plating |
Ｎｉ 3.0～5.0μm Ａｕ 0.03～0.05μm |
For the soldering of circuit boards, etc. |
| 24k plating | 0.1～5.0μm | To add electrical resistance to contacts, etc. |
| Au-Ni alloy plating | 0.2～10.0μm | to add high corrosion resistance to electronic components, etc. |
| Electroless Ni-P plating | 1.0～20.0μm |
To add high corrosion resistance, slide resistance, etc., to electronic components, etc. |
| Electro Ni plating | 1.0～10.0μm | For the soldering of heat sinks, etc. to add high corrosion resistance, etc. |
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We specialize in plating with the use of precious metals such as gold,
palladium and rhodium.Our high-quality plating adds deep shine and
high corrosion resistance to products, thereby enhancing their value and aesthetic appeal.
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| Name of plating | type | Plating thickness | Applications |
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| Gold plating | Au－Ni alloy Au－Fe alloy（ｎｏｎ-Ｎｉ） Au－Co alloy |
0.2～10μm 0.2～10μm |
Watches and writing instruments Components of electrical/communication equipment Accessories, etc. |
| Silver plating | Glossy/non-glossy | Electronic components・etc. | |
| Palladium plating | Pd-Ni alloy Pure Pd(non-Ni) |
Watches and writing instruments | |
| Rhodium plating | Thin plating | 0.1～0.3μm | Watches and writing instruments |
| Nickel Plating | Non-glossy Semi-glossy Glossy Electroless Ni-P |
High corrosion resistance | |
| Copper plating | Copper sulfate plating Copper cyanides plating |
Glossy foundation plating Strike plating（for improved adhesion） |
【Technical Points】
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In case of decorative plating, we can create final finish with desired colors. |
Materials that can be plated include the following metals:
| Gold | stainless steel | Nickel alloy | ||
| Silver | Iron | 42 alloy | ||
| Copper | Titanium | Inver | ||
| Brass | Nickel silver | Kovar | Beryllium copper | Other |
（Certified under ISO-9002 in November 1999）
We serve as a plating facility for circuit board manufacturing plants.We handle a range of plating specifications to meet the unique needs of circuit board manufacturers, even when such specifications aren't available from specialized platers.
| Processes | Plating thickness | Applications | Production capacity |
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| Hard Ni-Au | NI2.0～10.0μm Ａｕ 0.3～5.0μm |
For terminals For soldering |
2,000㎡／month |
| Electroless Ni-Au | Ｎｉ3.0～5.0μm Au 0.03～0.05μm |
For terminals For soldering |
2,000㎡／month |
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Overview of Various type of Plating
Nickel plating
| ・Glossy nickel plating |
Serves as a first plating to highlight the gloss of the metal; enhances corrosion resistance |
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| ・Semi-glossy nickel plating | First plating which utilizes the process of materials such as hairlining and sand blasting |
| ・Non-glossy nickel plating | Used to increase soldering adhesion and limit light reflection |
| ・Electroless nickel plating | Plating with phosphoric property for high corrosion resistance |
Gold plating
| ・Pure Gold plating（24ｋ plating） | Used for contacts and other parts requiring high conductivity |
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| ・Au-Ni alloy plating | Decorative gold plating that adds corrosion resistance and hardness |
| ・Au-fe alloy plating | Gold plating that prevents allergic reactions to nickel |
Palladium plating
| ・Pd-Ni alloy plating | Shining white-gold decorative plating used for exterior parts of watches and writing instruments |
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| ・Pure Pd plating | Palladium plating that prevents allergic to nickel |
Rhodium plating
| ・Rhodium plating | This beautiful white-gold decorative plating is used for exterior parts of watches as well as writing instruments. Its high reflectivity, hardness and good corrosion resistance make rhodium ideal for the plating of dental mirrors |
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Circuit board plating
| ・Hard Ni-Au platng | Electro-Ni-Au platng capable of covering the plated surface with a gold layer up to approx 5μ in thickness |
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| ・Electroless Ni-Au plating | Alternative gold plating for soldering |
Copper plating
| ・Copper sulfate plating | Plating with a leveling effect that enhances the gloss of the product |
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| ・Copper cyanide plating | Used in applications where greater adhesion is needed. |
Prototyping and Research & Development
Approximately 35% of the staff in our Surface Treatment Department are engineers. Surface-treatment technologies that support high-tech industries must continue to advance in order to accommodate changes in material applications and functions. Accordingly, Yamamoto Manufacturing is committed to the greater process of prototyping, research and development as the means to answer our customers' needs. Drawing on the resources of our Metalworking Department and our close relationships with cooperating factories, we provide a one-stop production service that covers every step from base-material production to surface treatment. Our constant objective is to enhance the efficiency of your cost planning and management.
Quality Assurance
We are the name to trust for comprehensive quality control and follow-up, and to that effort we apply a variety of analyzers and measuring devices. We can quickly provide you with the necessary documents regarding compliance with the REACH Regulation and RoHS Directive, which are now essential elements of environmentally responsible manufacturing.
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Fluorescent x-ray film thickness measuring equipment |
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Scanning electron microscope (SEM)
・Surface observation at high magnification |
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Potentiometric titrator |
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Environment
Yamamoto Manufacturing has implemented a complete set of treatment systems that incorporates wastewater treatment facilities and exhaust gas cleaning devices to protect the environment. We even employ systems to collect the precious metals contained in wastewater so that they can be recycled. It is a principle of our company and its employees to serve not only the communities in which we operate but aiso the world we share.
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