FCBGA (Flip-Chip Ball Grid Array), which is using the high-density micro bumps to connect the digital chips and substrate through the Flip Chip process, and place the passive devices next to the chips on the surface of substrate, to form BGA (Ball Grid Array) or LGA (Land Grid Array) package type. ACCESS uses SAP (Semi-additive process) technology to manufacture the FCBGA substrate with high density and high layer counts to support the high-end flip chips, and make sure the high efficiency electrical interconnect and high-speed transmission.