US Patent Issued to Poro Technologies on July 21 for "Wafer holder and method" (British Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,938, issued on July 21, was assigned to Poro Technologies LTD (Cambridge, Great Britain).

"Wafer holder and method" was invented by Tongtong Zhu (Cambridge, Great Britain) and Yingjun Liu (Cambridge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wafer holder for holding a semiconductor wafer during electrochemical porosification with an electrolyte includes a housing for receiving the semiconductor wafer, an aperture in the housing, through which an upper surface of the semiconductor wafer is exposable to the electrolyte, a seal extending around the aperture, for preventing the ingress of electrolyte into the housing; and an electri...