Hoya has patented a glass composition for magnetic recording media substrates or spacers in recording/reproducing devices. The glass contains specific ratios of oxides, ensuring thermal stability and compatibility with recording equipment. Key features include a high glass transition temperature, low expansion coefficient, and controlled content of alkali and alkaline earth oxides. GlobalData’s report on Hoya 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 Hoya, AI-assisted medical imaging was a key innovation area identified from patents. Hoya's grant share as of May 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
A recently granted patent (Publication Number: US11999652B2) discloses a unique glass composition designed for use in magnetic recording medium substrates or glass spacers for magnetic recording/reproducing apparatus. The glass composition specified in the patent claims features a specific mole ratio of Al2O3 and MgO to SiO2 and CaO, ensuring optimal properties for the intended applications. Additionally, the glass has a defined range of SiO2 and Al2O3 content, total content of various elements, glass transition temperature, linear expansion coefficient, and limits on the content of other oxides like Li2O, Na2O, K2O, B2O3, and ZnO.
Furthermore, the patent details various specific characteristics of the glass composition, such as the glass transition temperature, SiO2, Al2O3, and MgO content ranges, and the ratio of CaO content relative to other elements. The glass is also required to have a certain Young's modulus, specific gravity, and specific elastic modulus to meet the desired performance criteria. The patent also extends to cover magnetic recording medium substrates made from the specified glass composition, emphasizing the importance of these materials in the context of magnetic recording technology. Additionally, the patent includes claims related to magnetic recording media comprising the glass substrate and a magnetic recording layer, highlighting the potential applications and benefits of the patented glass composition in the field of magnetic storage technology.
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