Fig. 1. Schematic diagrams of experimental devices. (a) Experimental device for chemical-mechanical polishing; (b) schematic diagram of adhesive silicon wafer and adapter obtained by asphalt
Fig. 2. Measurement result and scratch extraction of Si(111) within 1 mm×1 mm region polished by polishing slurry with doping concentration of 0.00050% under 50×profilometry. (a) Surface morphology before image filtering; (b) scratch number density result obtained by manual identification after MATLAB image filtering; (c) scratch number density result obtained by automatic recognition afer MATLAB image filtering and feature extraction
Fig. 3. Normalized results of scratch depth distributions of Si(111), Si(110) and Si(100) within 1 mm×1 mm region polished by doping polishing slurry under 50×profilometer. Scratch depth distributions for (a) Si(111), (b) Si(110) and (c) Si(100) under doping concentration of 0.00200%; scratch depth distributions for (d) Si(111), (e) Si(110) and (f) Si(100) under doping concentration of 0.00020%; scratch depth distributions for Si(111) under doping concentration of (g) 0.00002%, (h) 0.00050% and (i) 0.00100%
Fig. 4. Particle size distribution of diamond micro powder with mean particle size of 4 μm measured by static light scattering
Fig. 5. Surface morphologies of monocrystalline silicon with different crystal directions polished by polishing slurry with doping concentration of 0.00200% under 50×profilometer. (a) Si(111),height range is -34.5--12.4 nm; (b) Si(110), height range is -8.4--5.9 nm; (c) Si(100), height range is -18.3--6.5 nm
Fig. 6. Scratch number density results of Si(111) polished by polishing slurry with gradient concentrations within 1 mm×1 mm region under 50×profilometer after load normalization
Fig. 7. RMS results of roughness of Si(111) polished by polishing slurry with gradient concentrations within 1 mm×1 mm region under 50×profilometer after load normalization
Fig. 8. PSD results of Si(111) polished by polishing slurry with doping concentration of 0.00200% under 50×profilometer. (a) Two-dimensional PSD result for X-Y direction; (b) one-dimensional PSD result for X direction
Fig. 9. PSD results of Si(111) polished by polishing slurry with doping concentration of 0.00020% under 50×profilometer. (a) Two-dimensional PSD result for X-Y direction; (b) one-dimensional PSD result for X direction
Fig. 10. Scratch number density results of Si(111), Si(110) and Si(100) within 1 mm×1 mm region polished by polishing slurry with doping concentrations of 0.00020%, 0.00040% and 0.00200% under 50×profilometer
Rogue particle concentration /% | Rogue particle number fraction | Scratch number density /mm-2 | Pressure P1 /Pa | N· /(mm-2·Pa-1/3) |
---|
0.00002 | 6.67×10-6 | 11 | 3704.6 | 0.71 | 0.00005 | 1.67×10-5 | 33 | 3704.6 | 2.13 | 0.00020 | 6.67×10-5 | 84 | 1898.4 | 6.78 | 0.00050 | 1.67×10-4 | 133 | 3704.6 | 8.60 | 0.00100 | 3.33×10-4 | 268 | 3704.6 | 17.30 | 0.00150 | 5.00×10-4 | 484 | 3260.7 | 32.60 | 0.00200 | 6.67×10-4 | 679 | 1898.4 | 54.80 |
|
Table 1. Gradient concentration of rogue particles and scratch number density of Si(111)