Wolfspeed has been granted a patent for a power converter module featuring an active metal braze (AMB) substrate with an aluminum nitride base layer, enhancing thermal dissipation. The module includes silicon carbide switching components and a housing, eliminating the need for a baseplate. GlobalData’s report on Wolfspeed 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 Wolfspeed, Quantum dot devices was a key innovation area identified from patents. Wolfspeed's grant share as of January 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Power converter module with improved thermal dissipation
A recently granted patent (Publication Number: US11888392B2) discloses a power converter module that includes a housing, a substrate with a base layer and a conductive layer, and power converter circuitry with silicon carbide switching components. The unique aspect of this module is the absence of a baseplate, which sets it apart from traditional power converter designs. The substrate can be a direct bonded copper substrate or an active metal braze substrate, offering flexibility in design and performance. The power converter circuitry can be configured in various topologies, including buck converters, inverters, and multilevel topologies like neutral point clamped (NPC) and transistor-type neutral point clamped (TNPC).
Furthermore, the power converter module includes silicon carbide metal-oxide-semiconductor field-effect transistors (MOSFETs) and Schottky diodes, providing efficient power conversion capabilities. The integration of these components on the substrate, along with additional features like inner-loop capacitors and snubber circuitry, enhances the overall performance and reliability of the module. Each channel of the power converter circuitry comprises silicon carbide transistors and diodes, ensuring optimal power flow and control. The inclusion of snubber circuitry with resistors and capacitors further improves the stability and efficiency of the power conversion process, making this module a promising innovation in the field of power electronics.
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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.
