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		合金元素对中温Sn-Ag-Cu焊料互连组织及剪切强度的影响
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			Effects of Alloy Elements on the Interfacial Microstructure and Shear Strength of Sn-Ag-Cu Solder
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| 图1. S1~S3样品器件侧和印刷电路板(PCB)侧的截面SEM像 | 
| Fig.1. Cross sectional SEM images of chip sides (a~c) and PCB sides (d~f) of S1 (a, d), S2 (b, e) and S3 (c, f) samples (PCB—printed circuit board, IMC—intermetallic compound) | 
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