* Some wafers damaged in 6.4-magnitude quake * Staff safe, production facilities intact * No damage at other Apple suppliers (Adds further TSMC comments) By J.R. Wu and Emily Chan TAIPEI, Feb 6 (Reuters) - Apple Inc supplier Taiwan Semiconductor Manufacturing Co Ltd (TSMC) said silicon wafers were damaged at a plant in southern Taiwan where a quake hit early on Saturday, affecting no more than 1 percent of first-quarter shipments. The world's biggest contract chipmaker has one of its largest and latest 12-inch wafer production facilities in the city of Tainan, where a 6.4-magnitude temblor led to the collapse of a 17-storey building and at least seven deaths. TSMC, whose customers also include Qualcomm Inc, is so far the only major Apple supplier in southern Taiwan to report damage from the earthquake. Acting spokeswoman Elizabeth Sun said wafers in the process of manufacture were seen broken.