Mitsuya

Mitsuya provides functional plating services for aerospace, semiconductor, and electronic component applications. This article explains how Mitsuya addresses customer challenges through high-precision plating for micro components, high-adhesion plating for difficult-to-plate substrates, and special coating development for space applications.

Source: Mitsuya official website
(https://www.mitsuya-plating.com/)

Challenges Mitsuya’s Functional Plating Can Help Solve

Proprietary Process Control
for Micro Components

Mitsuya helps prevent short circuits and poor contact caused by uneven coating thickness in increasingly miniaturized devices such as probes. It has established proprietary process control technology that uniformly applies precious metal plating even to micro components approximately 0.1 mm in diameter. This technology maintains uniform coating thickness even on parts with fine features, helping achieve both precision and durability.

Preventing Delamination
Without Heat Treatment

Plating delamination and heat-treatment-induced deformation are common challenges when working with difficult-to-plate substrates. To address these issues, Mitsuya has developed in-house pretreatment technology that achieves high adhesion without heat treatment, even on substrates with tenacious oxide films such as titanium. This technology maintains adhesion while avoiding heat-induced degradation, helping improve the durability of contact areas.

Reducing Rework
with Prototype-Stage Technical Support

Moving into volume production before specifications are finalized often leads to defects discovered later in the process. Mitsuya reduces this risk through a support system that provides technical consultation at the pre-specification stage and enables performance verification using prototypes. By helping customers finalize specifications early and supporting them through volume production, Mitsuya reduces development risks and rework costs.

Supported Plating Processes

When Is Mitsuya a Good Fit?

Mitsuya’s Plating Case Studies

Developing a UV-Absorbing Black Coating for a Space Observation Satellite

Challenges Before Implementation

For UV-absorbing plating intended for use on a space observation satellite, JAXA had already identified the required crystal structure.

However, JAXA was unable to find a plating supplier that could reproduce the identified crystal structure in an actual plated layer and provide it reliably on an ongoing basis.

Outcome

Mitsuya conducted R&D at its technical center, using microscale surface analysis equipment to verify the crystal structure. It established a UV-absorbing black treatment with high light absorption and low reflectance, enabling a stable supply of the special coating.

The technology developed by Mitsuya was adopted for a JAXA space observation satellite and is currently in operation aboard it.

Developing High-Reflectance Gold Plating for Space Experiments

Challenges Before Implementation

Company T, a provider of space-related equipment, was developing an experimental instrument for casting a compound semiconductor ingot in space, using a collector and a halogen lamp. The project required high-quality reflective plating on a precision-machined aluminum component, and the company was searching for a supplier capable of meeting this standard. Adding to the difficulty, the component had no backup — the plating process had to succeed on the very first attempt.

Outcome

Through close collaboration between our technical and production departments, we completed the high-reflectance gold plating flawlessly, without a single scratch — an achievement we take pride in on a global scale. The component was used in space experiments conducted by Dr. Mohri, and the experiment was a success.

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