ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,838, issued on Feb. 10, was assigned to TOPPAN INC. (Tokyo).
"Quantum dot and method for producing the same" was invented by Soichiro Nikata (Fukuoka, Japan), Yuko Ogura (Fukuoka, Japan), Mikihiro Takasaki (Fukuoka, Japan) and Yuka Takamizuma (Fukuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An object is to provide a quantum dot that has a narrow fluorescence half-width and a high fluorescence quantum yield, and emits blue fluorescence. A quantum dot (5) according to the present invention includes at least Zn and Se and does not include Cd, and has a particle diameter of 5 nm or more and 20 nm or less. In addition, the quantum dot (5) a...