Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing

WANG Chao; GE Peiqi; He Jikai; WANG Xinhui

doi:10.13394/j.cnki.jgszz.2022.0207

Volume 43 Issue 5

Oct. 2023

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Article Navigation > Diamond & Abrasives Engineering > 2023 > 43(5): 612-620

WANG Chao, GE Peiqi, He Jikai, WANG Xinhui. Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing[J]. Diamond & Abrasives Engineering, 2023, 43(5): 612-620. doi: 10.13394/j.cnki.jgszz.2022.0207

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WANG Chao, GE Peiqi, He Jikai, WANG Xinhui. Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing[J]. Diamond & Abrasives Engineering, 2023, 43(5): 612-620. doi: 10.13394/j.cnki.jgszz.2022.0207

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Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing

doi: 10.13394/j.cnki.jgszz.2022.0207

WANG Chao^1
,,
GE Peiqi^{1, 2
,
,},
He Jikai³,
WANG Xinhui³

1.
School of Mechanical Engineering, Shandong University, Jinan 250061, China
2.
Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China
3.
Qingdao Gaoce Technology Inc, Qingdao 266114, Shandong, China

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Received Date: 2022-11-24
Accepted Date: 2023-03-09
Rev Recd Date: 2023-02-08

Available Online: 2023-12-07

Abstract

Abstract

Due to the anisotropy of sapphire crystal material, the mechanical properties vary in multi-wire saw slicing based on different cutting positions. This variation leads to the deviation of the diamond wire in the vertical feed direction, resulting in the surface shape deviation of the sapphire wafers. To further investigate the influence of crystal anisotropy on the surface shape deviation of the wafer, the properties of sapphire crystal material were analyzed, and the distribution of the elastic modulus of its common crystal surfaces was calculated. By simulating the sawing force, the surface shape deviation of the wafer was calculated, and the influence of process parameters on the surface shape deviation was analyzed. The results show that the surface shape deviations of wafers cut from the C-plane, A-plane, and M-plane are not affected by the anisotropy of sapphire. A feed angle of 90° or 270° can be selected to obtain a small surface shape deviation during the slicing process of the R-plane. Additionally, reducing the specific feed rate or adopting the variable speed feed method can reduce the wafer's surface shape deviation.
- sapphire,
- diamond wire saw,
- crystal anisotropy,
- surface shape deviation,
- process parameter

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References(15)

References

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Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing

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Influence of crystal anisotropy and process parameters on surface shape deviation of sapphire slicing

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