ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,923, issued on March 18, was assigned to NITERRA Co. LTD. (Nagoya, Japan).
"Joined body, holding device, and electrostatic chuck" was invented by Osamu Yoshimoto (Nagoya, Japan), Ryuichi Arakawa (Nagoya, Japan) and Tomoo Tanaka (Nagoya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A joining layer of a joined body includes a joining material which contains, as a main component, a metal having a surface tension of 1000 mN/m or less at its melting point, and a metal layer which has a plurality of pores formed therein and in which at least some of the pores are impregnated with the joining material."
The patent was filed on June 25, 2021, unde...