Seagate Technology has been granted a patent for a heat-assisted magnetic recording (HAMR) device that enables the writing of neutral polarity regions on magnetic media. This method allows for the encoding of three logical states and the creation of transition zones between data bits during a single pass of the recording head. GlobalData’s report on Seagate Technology 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 Seagate Technology, Artificial concrete aggregates was a key innovation area identified from patents. Seagate Technology's grant share as of July 2024 was 72%. Grant share is based on the ratio of number of grants to total number of patents.
Heat-assisted magnetic recording with neutral polarity regions
The patent US12073862B2 outlines a method and apparatus for enhancing data writing on heat-assisted magnetic recording (HAMR) devices. The method involves controlling a write element to write data to adjacent data bits on magnetic storage media while creating a region of neutral polarity at the boundary between these bits. This neutral region is designed to be smaller than the width of the data bits, which helps in managing the magnetic properties of the data being written. The claims detail how the polarity of magnetic grains in a first recording layer can be altered after fixing the polarity in a second recording layer, allowing for improved data integrity and density.
Additionally, the patent describes the structure of the magnetic media, which consists of two recording layers with multiple pairs of adjacent data bits having opposite polarities. A neutral polarity region is established between these bits, with specific dimensions that optimize performance. The media includes a fully decoupled recording temperature break layer that separates the two recording layers, which has a lower Curie temperature than both layers and facilitates controlled magnetic reversals at different temperatures. The HAMR device is equipped with a recording head that incorporates a heat element, enabling precise control over the magnetic write field to create the neutral polarity regions effectively during a single pass. This innovation aims to enhance the efficiency and reliability of data storage in magnetic media.
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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.
