Wafers Geometry

[INDEX.HTM] Terms of use ELECTRONIC (SEMICONDUCTOR) GRADE Diameter (mm) As-cut 76 ± 0.5* 100 ± 0.5* 125 ± 0.5* 150 ± 0.5* 200 ± 0.5* Lapped 76 ± 0.3 100 ± 0.3 125 ± 0.3 150 ± 0.3 200 ± 0.3 Thickness ( m m) As-cut 76 ± 0.3 350 500 700 700 Lapped 300 400 560 625 625 Thickness Tolerance ( m m As-cut ± 25 ± 25 ± 25 ± 25 ± 25 Lapped ± 25 ± 25 ± 25 ± 25 ± 25 Total Thickness Variation ( m m) As-cut £ 10 £ 15 £ 25 £ 25 £ 25 Lapped £ 4 £ 6 £ 8 £ 10 £ 10 Bow ( m m) As-cut £ 25 £ 30 £ 40 £ 50 50 Lapped £ 25 £ 30 £ 40 £ 50 50 § Orientation Flats – by SEMI M1 Standard or customer’s specification § Edge Rounding – by SEMI M1 Standard or customer’s specification § Orientation Tolerance – by SEMI M1 Standard or customer’s specification WAFER GEOMETRY SOLAR (PHOTOVOLTAIC) GRADE Parameters Monocrystalline Multycrystalline Full Square Pseudo-Square Dimensions (mm) 150 x 150 103 ´ 103, Æ 135 125 ´ 125, Æ 150 125 ´ 125, Æ 165 150 ´ 150, Æ 195 155 ´ 155, Æ 205 *125 ´ 125 150 ´ 150 Thickness ( m m ) 300 ± 30 270 ± 30 240 ± 30 300 ± 30 270 ± 30 240 ± 30 300 ± 30 270 ± 30 240 ± 30 * 220 ± 30