Sumitomo Metal Mining has been granted a patent for a thick film resistor paste designed to minimize resistance changes and enhance surge resistance. The paste includes an organic vehicle and a glass powder containing ruthenium oxide and lead ruthenate, with specific mass percentages of silicon oxide, lead oxide, and boron oxide. GlobalData’s report on Sumitomo Metal Mining 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 Sumitomo Metal Mining, Extraction by leaching was a key innovation area identified from patents. Sumitomo Metal Mining's grant share as of July 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
The granted patent US12024466B2 introduces a thick film resistor paste that includes a specific formulation of materials designed to enhance its conductive properties. The paste comprises an organic vehicle and a conductive substance-containing glass powder that features a combination of ruthenium oxide and lead ruthenate. Notably, the glass powder contains between 10% and 70% by mass of these conductive substances. The glass composition is defined by specific ranges: it includes 3% to 60% silicon oxide, 30% to 90% lead oxide, and 5% to 50% boron oxide, with the total of these oxides being at least 50% by mass relative to the glass components. Additionally, the average particle diameter of the glass powder is specified to be 5 micrometers or less.
The patent further claims the thick film resistor made from the aforementioned paste, which results in a sintered body that retains the conductive properties of the original formulation. This sintered body can be integrated into electronic components, thereby enhancing their performance. The claims emphasize the specific ratios and compositions of the materials used, which are critical for achieving the desired electrical characteristics in thick film resistors.
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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.
