1).First-class products (Class I tablets)
1. Physical and chemical properties ①Model: P crystal orientation <100>±1°; 18 3 ②Oxygen content: ≤1.0×10 at/cm; 16 3 ③Carbon content: ≤5×10 at/cm; ④Minority carrier lifetime :τ=1.3-3.0μs (data of bare chip under test voltage ≥20mv); ⑤Resistivity: 0.9-1.2, 1.2-3.0, 3.0-6.0Ω·cm; 2 ⑥Dislocation density: ≤3000 pieces/cm ; 2. Geometric dimensions ①Side length: 125×125±0.5mm; ②Diagonal: 150×150±0.5mm; ③Concentricity: the difference between the chord lengths of any two arcs ≤1mm; ④Perpendicularity: the clamp on any two sides Angle 90°±0.3°; ⑤Thickness: 200±20μm; (thickness at center point≥195μm, thickness at four points at the edge≥180μm) 180±20μm; (thickness at center point≥175μm, thickness at four points at edge≥160μm) ⑥TTV: ≤30μm; ⑦Curvity: ≤40μm; 3. Surface indicators ①Line marks: no visual marks; ②Visual surface: no contamination, no water stains, dyeing, white spots, fingerprints, etc.; ③No chipping, no Visual cracks, smooth edges, no warping visually;
2). Qualified products (Class II tablets)
1. Physical and chemical properties ①Model: P crystal orientation<100>±1°; ②Oxygen content: ≤1.0×1018at/cm3; ③Carbon content: ≤5×1016at/cm3; ④Minority carrier lifetime: τ=1.0-1.2μs (Data of bare chip under test voltage ≥20mv); ⑤Resistivity: 0.5-0.8Ω·cm; ⑥Dislocation density: ≤3000 pieces/cm2; 2. Geometric dimension ①Side length: 125×125±0.5mm; ②Diagonal: 150×150±0.5mm; ③Concentricity: The difference between the chord lengths of any two arcs ≤1.5mm; ④Perpendicularity: The angle between any two sides is 90°±0.3°; ⑤Thickness: 200±20μm;( Thickness at center point≥195μm, thickness at four edge points≥180μm) 180±20μm; (thickness at center point≥175μm, thickness at four edge points≥160μm)
⑥TTV: ≤30μm; ⑦Bending degree: ≤40μm; 3. Surface indicators ①Line marks: no obvious line marks, no bumps when touched. ② Range of edge collapse: edge collapse is not "V" shape, length × depth ≤ 1 × 0.5mm, number ≤ 1 piece/piece; no visible cracks, smooth edges, no warping visually;
3).Other products (Class III tablets)
1. Physical and chemical properties ①Model: PN crystal orientation <100>±3°; ②Oxygen content: ≤1.0×1018at/cm3; 16 3 ③Carbon content: ≤5×10 at/cm; ④Minority carrier lifetime: τ< 1.0μs (data of bare chip under test voltage ≥20m); ⑤Resistivity: ≤0.5Ω·cm; ⑥Dislocation density: >3000 pieces/cm2; 2. Geometry ①Side length: 125×125±1.0mm ; ②Diagonal: 150×150±1.0mm; ③Concentricity: the difference between the chord lengths of any two arcs ≤1.5mm; ④Perpendicularity: the angle between any two sides is 90°±0.5°; ⑤Thickness: <160μm 3. Surface indicators ① There are obvious line marks, and the touch has a bumpy feeling.
Note: As long as it meets any one of the third "extraordinary products (Class III tablets)", it will be judged as a non-conforming product.
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