Three-dimensional objects

By controlling the surface roughness of the inner wall of three-dimensional metal structures through chemical polishing, the challenges of high insertion loss and bonding issues in waveguide devices are addressed, resulting in more efficient waveguide devices with reduced insertion loss.

JP7651026B2Active Publication Date: 2025-03-25MITSUBISHI ELECTRIC CORP
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Patent Information

Application Number
JP2024012568
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-01-31
Publication Date
2025-03-25
Estimated Expiration
2040-08-26

AI Technical Summary

Technical Problem

Existing methods for manufacturing three-dimensional metal structures, such as waveguide devices, face challenges including high insertion loss due to surface roughness and bonding issues between divided parts, which hinder the creation of efficient waveguide devices with reduced insertion loss.

Method used

A three-dimensional structure made of metal containing impurities, with a rectangular cross-section and a tubular portion, where the surface roughness of the inner wall is controlled within a specific range (2 μm to 4 μm) through a chemical polishing process to reduce insertion loss.

Benefits of technology

The controlled surface roughness of the inner wall in the three-dimensional metal structure effectively reduces insertion loss, enabling the manufacture of waveguide devices with improved performance.

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Abstract

To provide a three-dimensional molded body that is three-dimensionally molded using a metal powder containing an impurity and reduced in insertion loss.SOLUTION: A three-dimensional molded body 100 in the present disclosure comprises a metal containing an impurity 1, assuming a rectangular cross section at one end and having a tubular portion 5, 5a. In the three-dimensional molded body 100, an inner wall 4 of the tubular portion 5, 5a has a surface roughness falling within a range of previously set values or within a range of values determined based on the frequency of an electromagnetic wave propagated to the tubular portion 5, 5a.SELECTED DRAWING: Figure 2
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