ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,396,275, issued on Aug. 19, was assigned to Optohub Co. Ltd (Nagano, Japan).
"Photo detection device" was invented by Ikuo Kurachi (Tokyo), Hiroshi Takano (Tokyo) and Yasumasa Kashima (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "To provide a photo detection device and a manufacturing method thereof, the photo detection device comprising a SPAD in which a substrate-manufacturing cost is kept sufficiently low compared to InGaAs, afterpulsing is less and DCR is also reduced.A photo detection device detecting an incident light from an object, comprising: (i) a P-type silicon (Si) substrate; (ii) a P-type germanium (Ge) layer formed by epitaxial gro...