Dowa has patented a semiconductor light-emitting element with enhanced light emission output. The element features a layered structure with specific composition ratios and wavelength differences, improving performance. 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 January 2024 was 33%. Grant share is based on the ratio of number of grants to total number of patents.

Semiconductor light-emitting element with improved light emission output

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

A recently granted patent (Publication Number: US11888090B2) discloses a semiconductor light-emitting element with a unique layered structure. The element includes a light-emitting layer composed of first and second III-V compound semiconductor layers with different composition ratios stacked repeatedly. These layers contain multiple types of group III and group V elements, with a composition wavelength difference of 50 nm or less and a specific ratio of lattice constant difference. The patent also covers variations in the number of elements in the layers and the inclusion of a third III-V compound semiconductor layer with similar characteristics.

Furthermore, the patent includes a method for producing the semiconductor light-emitting element, involving the formation of the first and second III-V compound semiconductor layers and the repeated formation of the light-emitting layer. The disclosed method ensures the precise composition and structure required for optimal performance of the semiconductor light-emitting element. Overall, the patent highlights the importance of specific composition ratios, wavelength differences, and lattice constant variances in achieving efficient semiconductor light emission, offering valuable insights for further advancements in the field.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.