42 Custom design, engineering and testing for new product development of semiconductors and integrated circuits; technology consultation services regarding semiconductors and integrated circuits; Custom design, engineering and testing for new product development of semiconductors and integrated circuits in the fields of semiconductor wafer bonding, semiconductor die bonding, and wafer-level packaging of semiconductors; technology consultation services regarding semiconductors and integrated circuits in the fields of semiconductor wafer bonding, semiconductor die bonding, and wafer-level packaging of semiconductors