Dowa patented a copper alloy sheet material with a specific composition to achieve a whitish metallic appearance, excellent strength-bending workability balance, and discoloration resistance. The alloy contains Ni (12-30%), Al (1.80-6.50%), and other elements within defined ranges, with a specific structure of fine particles. GlobalData’s report on Dowa gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Dowa, 3D memory devices was a key innovation area identified from patents. Dowa's grant share as of March 2024 was 48%. Grant share is based on the ratio of number of grants to total number of patents.

Copper alloy sheet material with specific composition and structure

Source: United States Patent and Trademark Office (USPTO). Credit: Dowa Holdings Co Ltd

A recently granted patent (Publication Number: US11946129B2) discloses a copper alloy sheet material with a specific composition that includes nickel (Ni) ranging from more than 12.0% to 30.0%, aluminum (Al) between 1.80% and 6.50%, and various other elements in defined percentages. The material is characterized by a metallic structure containing fine secondary phase particles with a particle diameter of 20 to 100 nm, meeting specific density requirements. Additionally, the patent claims methods for producing this copper alloy sheet material, involving heating, hot rolling, cold rolling, solution treatment, aging treatments, and specific rolling reduction ratios and temperatures to achieve the desired metallic structure.

Furthermore, the patent includes claims for a conductive spring member made from the copper alloy sheet material described, highlighting its potential applications in various industries requiring materials with specific mechanical properties. The patent's detailed specifications aim to protect the unique composition, structure, and production methods of the copper alloy sheet material, emphasizing its strength, crystal particle size, and secondary phase particle density. Overall, the patent provides a comprehensive overview of the innovative copper alloy sheet material and its production processes, offering valuable insights for manufacturers and researchers in the field of materials science and engineering.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.