silicon wafer photoetching; etching of silicon wafer; chemical mechanical grinding services for others; Processing of computer chips, semiconductor chips, integrated circuits; processing of logic chips, mixed-signal chips and memory chips for others; Semiconductor chip and integrated circuit cutting, molding and etching processing for others; Semiconductor wafer, semiconductor chips and integrated circuit processing and custom assembly services for others; Processing of photomasks for integrated circuits, encoded electronic chips and computer chips for others; custom assembling of integrated circuits, encoded electronic chips and computer chips for others; Printed circuit processing for others