according to the market research firm gartner, ase is the largest outsourced semiconductor assembly and test (osat) provider, with 19 percent market share. the company offers services such as semiconductor assembly, packaging and testing. ase provides semiconductor assembly and testing services for over 90 percent of electronics companies in the world. the packaging services include fan-out wafer-level packaging (fo-wlp), wafer-level chip-scale packaging (wl-csp), flip chip, 2.5d and 3d packaging, system in package (sip) and copper wire bonding.