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Thermal characteristics

#1   All values are calculated by simulating the test method using wind tunnel according to the SEMI standard. Air velocity of 0 m/s represents natural convection under still air in the wind tunnel specified in of SEMI standard.
#2   Thermal characteristics is affected by the environmental conditions such as the density of copper pattern on the test board etc.

Ball count PKG size[mm] Die size[mm] Thermal Test
Board
Layers		 θja(°c/w)
0m/s 1m/s 2m/s
256 27x27 4.3x4.3 4 29 23 21
256 27x27 7.27x7.27 4 22 16 15
256 27x27 10.12x10.12 4 20 15 13
352 35x35 5.67x5.67 4 22 16 14
352 35x35 8.07x8.07 4 19 14 12
352 35x35 14.92x14.92 4 17 11 10
420 35x35 6.47x6.47 4 20 15 13
420 35x35 10.12x10.12 4 18 12 11
432 27x27 6.82x6.82 4 24 18 16
432 40x40 8.35x8.35 4 17 12 11
500 40x40 7.27x7.27 4 18 13 12
500 40x40 10.12x10.12 4 17 11 10
500 40x40 12.15x12.15 4 16 11 9
576 40x40 8.3x8.3 4 18 13 11
576 40x40 12.34x12.34 4 16 10 9
576 40x40 14.9x14.9 4 15 10 9
644 40x40 9.1x9.1 4 17 12 11
644 40x40 10.6x10.6 4 16 11 10
648 35x35 7.27x7.27 4 20 15 13
648 35x35 9.12x9.12 4 19 13 12
696 40x40 9.8x9.8 4 17 12 11
696 40x40 14.914.9 4 16 10 9
768 40x40 10.06x10.06 4 15 10 9
768 40x40 11.32x11.32 4 16 11 9
868 40x40 11.06x11.06 10 15 10 9
868 40x40 11.06x11.06 14 15 10 9
868 40x40 11.72x11.72 8 18 12 10
868 40x40 12.22x12.22 12 14 10 9