BAE Systems had two patents in connectivity during Q2 2024. BAE Systems Plc has developed a method for growing large diameter IR window slabs of GaP and GaAs using Hydride Vapor Phase Epitaxy (HVPE), with growth rates comparable to vertical melt growth. The method results in lower absorption and reduced impurities in the crystals, making them suitable for EMI shielding applications. Silicon wafers can be used as substrates, and varying layers of GaAsP can be applied to the substrate for GaAs growth. GlobalData’s report on BAE Systems gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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BAE Systems had no grants in connectivity as a theme in Q2 2024.
Recent Patents
Application: Method of producing large gaas and gap infrared windows (Patent ID: US20240184015A1)
BAE Systems Plc has developed a method for growing large infrared (IR) window slabs of GaP and GaAs using Hydride Vapor Phase Epitaxy (HVPE), particularly low pressure HVPE (LP-HVPE). These slabs can have diameters greater than 4 inches for GaP and greater than 8 inches for GaAs, with growth rates comparable to vertical melt growth. The method results in lower absorption in GaAs IR windows compared to conventional boules due to reduced impurities and growth temperatures, limiting the solubility of excess arsenic and reducing defects causing high absorption near one micron.
The patent claims cover the production of IR windows made from GaAs or GaP slabs with dimensions exceeding 8 inches, grown on single crystal silicon substrates using HVPE. The method involves applying layers of GaAs or GaP to the substrate, growing the slab to the desired thickness, and then removing the substrate. Additional claims include the application of an electrically conductive layer, anti-reflective coating, and the use of dopants for EMI shielding. The method allows for the production of large, high-quality IR windows with reduced absorption and improved performance for various applications.
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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.
