Study on layer formation behavior of Ag joints sintered with pressureless sintering process
This study focuses on investigating the relationship between sintering performance and bond layer thickness for the hybrid Ag paste consisting of micrometer-sized Ag particles and sub-micrometer Ag spherical particles. The surface morphology showed that the sub-micrometer Ag particles would contribu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac9d84 |
| _version_ | 1797746260249149440 |
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| author | Liujue Wang Taojie Ding Lin Gu Xiaodong Sun |
| author_facet | Liujue Wang Taojie Ding Lin Gu Xiaodong Sun |
| author_sort | Liujue Wang |
| collection | DOAJ |
| description | This study focuses on investigating the relationship between sintering performance and bond layer thickness for the hybrid Ag paste consisting of micrometer-sized Ag particles and sub-micrometer Ag spherical particles. The surface morphology showed that the sub-micrometer Ag particles would contribute to improving the densification and bonding strength of the sintered Ag joint. The x-ray results indicated that the bonding quality was achieved when the bonding layer thickness was 50 μ m, whereas a thinner or thicker bonding layer would lead to cracks or voids. Moreover, the microstructure of sintered Ag joints with different bonding layer thicknesses was found to be in good agreement with the results of x-ray by SEM observations. There are many cracks in the sintering structure due to the insufficient Ag paste when the bonding layer thickness is below 50 μ m, while more voids appeared in sintered Ag joints when the thickness reached 120 μ m, which was caused by the organic solvent volatilization. In addition, the poor densifications lead to low strengths of 7.6 MPa and 23.42 MPa for 15 μ m and 30 μ m thickness, respectively. The shear test results revealed that the highest shear strength was achieved on the bonding layer with a 50 μ m-thick bonding layer. However, the bonding strength would decrease to 24.67 MPa and 18.64 MPa when the bonding layer thickness was 90 μ m and 120 μ m, respectively. The SEM observations indicated that many dimples were formed on the fracture surface with a thickness of 50 μ m, which was the reason for the enhancement of bonding strength in the sintered Ag joint. |
| first_indexed | 2024-03-12T15:35:17Z |
| format | Article |
| id | doaj.art-56a95faeee6648e286b93eaba5ad44b0 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:35:17Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-56a95faeee6648e286b93eaba5ad44b02023-08-09T16:16:17ZengIOP PublishingMaterials Research Express2053-15912022-01-0191111651210.1088/2053-1591/ac9d84Study on layer formation behavior of Ag joints sintered with pressureless sintering processLiujue Wang0https://orcid.org/0000-0001-7149-523XTaojie Ding1Lin Gu2Xiaodong Sun3China Electronics Technology Group Corporation No. 58 Research Institute, Wuxi, 214072, People’s Republic of ChinaChina Electronics Technology Group Corporation No. 58 Research Institute, Wuxi, 214072, People’s Republic of ChinaChina Electronics Technology Group Corporation No. 58 Research Institute, Wuxi, 214072, People’s Republic of ChinaChina Electronics Technology Group Corporation No. 58 Research Institute, Wuxi, 214072, People’s Republic of ChinaThis study focuses on investigating the relationship between sintering performance and bond layer thickness for the hybrid Ag paste consisting of micrometer-sized Ag particles and sub-micrometer Ag spherical particles. The surface morphology showed that the sub-micrometer Ag particles would contribute to improving the densification and bonding strength of the sintered Ag joint. The x-ray results indicated that the bonding quality was achieved when the bonding layer thickness was 50 μ m, whereas a thinner or thicker bonding layer would lead to cracks or voids. Moreover, the microstructure of sintered Ag joints with different bonding layer thicknesses was found to be in good agreement with the results of x-ray by SEM observations. There are many cracks in the sintering structure due to the insufficient Ag paste when the bonding layer thickness is below 50 μ m, while more voids appeared in sintered Ag joints when the thickness reached 120 μ m, which was caused by the organic solvent volatilization. In addition, the poor densifications lead to low strengths of 7.6 MPa and 23.42 MPa for 15 μ m and 30 μ m thickness, respectively. The shear test results revealed that the highest shear strength was achieved on the bonding layer with a 50 μ m-thick bonding layer. However, the bonding strength would decrease to 24.67 MPa and 18.64 MPa when the bonding layer thickness was 90 μ m and 120 μ m, respectively. The SEM observations indicated that many dimples were formed on the fracture surface with a thickness of 50 μ m, which was the reason for the enhancement of bonding strength in the sintered Ag joint.https://doi.org/10.1088/2053-1591/ac9d84hybrid Ag pastesinteringbond layer thicknessmicrostructureshear strength |
| spellingShingle | Liujue Wang Taojie Ding Lin Gu Xiaodong Sun Study on layer formation behavior of Ag joints sintered with pressureless sintering process Materials Research Express hybrid Ag paste sintering bond layer thickness microstructure shear strength |
| title | Study on layer formation behavior of Ag joints sintered with pressureless sintering process |
| title_full | Study on layer formation behavior of Ag joints sintered with pressureless sintering process |
| title_fullStr | Study on layer formation behavior of Ag joints sintered with pressureless sintering process |
| title_full_unstemmed | Study on layer formation behavior of Ag joints sintered with pressureless sintering process |
| title_short | Study on layer formation behavior of Ag joints sintered with pressureless sintering process |
| title_sort | study on layer formation behavior of ag joints sintered with pressureless sintering process |
| topic | hybrid Ag paste sintering bond layer thickness microstructure shear strength |
| url | https://doi.org/10.1088/2053-1591/ac9d84 |
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