9-Ball Wafer Level Chip Scale Package [WLCSP] (CB-9-4) Dimensions shown in millimeters Top View A1 BALL CORNER 1 2 Bottom View 3 3 2 A 1 A 1.280 1.240 1.200 B 0.80 REF B 0.40 REF C C 1.280 1.240 1.200 0.415 0.400 0.385 0.80 REF // 0.10 C 0.645 0.600 0.555 0.230 0.200 0.170 0.300 0.260 0.220 0.05 C 09-23-2010-A Seating Plane C