ROHM has been granted a patent for a thermal print head and its fabrication method. The print head includes a substrate made of semiconductor material with a resistor layer and wiring layer. The unique design of the convex portion enhances heat generation efficiency. GlobalData’s report on ROHM 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 ROHM, Under-screen biometric identification was a key innovation area identified from patents. ROHM's grant share as of February 2024 was 77%. Grant share is based on the ratio of number of grants to total number of patents.
Thermal print head with convex portion for heat generation
A recently granted patent (Publication Number: US11926156B2) discloses a thermal print head designed with a unique structure to enhance printing efficiency. The thermal print head comprises a substrate made of semiconductor material with a convex portion protruding from the main surface, housing a resistor layer with heat generating portions aligned in the main scanning direction. The wiring layer connects to the heat generating portions and the resistor layer, with the convex portion featuring various inclined surfaces to optimize heat distribution and printing quality. The patent also details the fabrication method for this thermal print head, involving anisotropic etching and the formation of a mask layer to create the intricate structure necessary for efficient thermal printing.
Furthermore, the patent outlines specific features of the thermal print head, such as the arrangement of inclined surfaces, the connection between the convex portion and the top surface, and the presence of insulating and protective layers for enhanced durability. The method of fabrication involves the strategic use of different mask layers to achieve the desired structure, with one mask layer being more easily dissolved during etching to ensure precision. By detailing the construction and manufacturing process of this thermal print head, the patent aims to protect the innovative design and method, potentially revolutionizing the thermal printing industry with improved performance and reliability.
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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.
