作為BGA、CSP的重要輔料,焊錫球主要應(yīng)用于筆記本電腦、移動(dòng)通信設(shè)備、計(jì)算機(jī)主板、發(fā)光二極管、液晶顯示器、PDA、數(shù)字相照機(jī)等產(chǎn)品的功能IC生產(chǎn)過(guò)程中。具有純度和圓球度高,表面無(wú)缺陷等特點(diǎn)。
焊錫球金屬成分
分類 Classes |
合金 Alloy |
熔點(diǎn)(℃)Melting Point | |
固相線溫度 Solidus | 液相線溫度 Liquidus | ||
含鉛基焊球 Lead-based solder ball |
63Sn-37Pb | 183 | |
62Sn-36Pb-2Ag |
179 | ||
60Sn-40Pb | 183 | 191 | |
10Sn-90Pb | 275 | 302 | |
無(wú)鉛基焊球 Lead-free solder ball |
Sn-Ag-Cu | 217-219 | |
Sn-Ag | 221 | ||
Sn-Cu | 230 | ||
Sn-Sb | 240 |
焊錫球型號(hào)
用類型號(hào) Type |
球徑 Diameter |
球徑誤差 Diameter Tolerance |
球型公差 Spherical Tolerance |
備注 Note |
PBGA | 760μ | ±20μ | <1.0% | 不完整的球體必須 是98%以上的球形 The spherical degree of Imperfect ball must be above 98%. |
500μ | ±20μ | |||
CSP用焊球 | 400μ | ±20μ | ||
小型BGA用焊球 | 380μ |
±20μ | ||
±20μ | ||||
350μ |
±20μ | |||
±20μ | ||||
330μ |
±20μ | |||
±20μ | ||||
300μ | ±20μ | |||
±20μ | ||||
250μ | ±10μ | |||
200μ | ±10μ | |||
100μ | ±10μ |