H ELECTRICITY
H01 ELECTRIC ELEMENTS
H01L SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
H01L2224/00 Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
H01L2224/01 Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
H01L2224/02 Bonding areas; Manufacturing methods related thereto
H01L2224/04 Structure, shape, material or disposition of the bonding areas prior to the connecting process
H01L2224/05 of an individual bonding area
H01L2224/0554 External layer
H01L2224/056 with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof