Infineon's 2024 SiC Trench Patent and Europe's Position in the Power-Chip Supply Chain

The risk fact first: the power-semiconductor supply chain that runs electrification is concentrated among a few incumbents, and several of the largest are European. US11881512B2, granted January 2024 to Infineon, is a method for manufacturing a silicon-carbide (SiC) power device (CPC H01L 29/1608).

Gloss it once. The patent is a manufacturing method for a SiC device with a silicon-carbide body — the process by which the high-voltage switch is built. In power chips the process is the competitive edge, because device concepts are mature and yield decides cost. Infineon is a top supplier of these parts into automotive and industrial markets.

“A method includes providing a silicon carbide substrate, wherein a gate trench extends from a main surface of the silicon carbide substrate into the silicon carbide substrate and wherein a gate dielectric is formed on at least one sidewall of the gate trench, and forming a gate electrode in the gate…”— U.S. Patent No. 11,881,512 source

Why a risk-and-supply desk reads it: the buyers of power chips — automakers, industrial OEMs — depend on a short list of suppliers concentrated in Europe and Asia. That supplier concentration is a strategic dependency, the mirror image of the customer-concentration risk we usually track. A leading European incumbent's process filings map where that dependency sits.

The geography is the point. Power-semiconductor leadership clusters among European and Japanese incumbents, and Infineon is central to the European side. A 2024 SiC process grant is a small confirmation of that concentration — relevant to anyone modeling supply risk in the electrification chain.

The caveat we attach: this is a manufacturing-method patent and a defensive asset. It evidences Infineon's continued SiC process investment; it does not quantify share, volume, or customer exposure.

For the period reader, the takeaway is that power-chip supply risk is geographically concentrated, and Europe is a major node of it. A 2024 Infineon SiC grant marks one incumbent defending that position.