Patent ID: 11876066
Assignee: TANAKA DENSHI KOGYO K. K.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A wire bonding structure, comprising: an aluminum-containing electrode of a semiconductor chip; a bonding wire; and a ball bonding portion between the electrode and the bonding wire, wherein
the bonding wire is a palladium-coated copper bonding wire including: a core material containing copper as a main component; and a palladium layer on the core material and containing a sulfur group element, the palladium-coated copper bonding wire in which with respect to a total of copper, palladium, and the sulfur group element, a concentration of palladium is 1.0 mass % or more and 4.0 mass % or less and a total concentration of the sulfur group element is 50 mass ppm or less, and a concentration of sulfur is 5 mass ppm or more and 12 mass ppm or less, a concentration of selenium is 5 mass ppm or more and 20 mass ppm or less, or a concentration of tellurium is 15 mass ppm or more and 50 mass ppm or less, and
the wire bonding structure includes a palladium-concentrated bonding region with the concentration of palladium being 2.0 mass % or more relative to a total of aluminum, copper, and palladium near a bonding surface of the electrode and the ball bonding portion.