A multi-chip BGA package has two or more rerouted chips, each of which has one or more electrode plates. The method comprises the steps of; CON-in case of congestion, detecting the amount of download data still to be downloaded by each of the mobile stations and, -based on the amount of download data still to be downloaded, releasing the associated dedicated channel for one or more first mobile stations having an amount of data above a predetermined threshold level. Therefore, the surface of the high-k metal gate after the CMP is aluminum alloy rather than pure aluminum, which can greatly reduce defects, such as corrosion, pits and damage, in the metal gate and improve reliability of the semiconductor device. A request is received, from a user, to determine occupancy of the electrical charging equipment at one or more of the charging stations during a specified future time window.