This paper studies the bending and vibration effects on the fatigue lifetime of ball grid array (BGA) solder joints. The correlation between the fatigue lifetime of the assembly and the heating factor ...

A design-for-reliability methodology was applied to a micro-BGA assembly with lead-free, 95.5Sn-3.8Ag-0.7Cu solder joints. A rate dependent viscoplastic Anand model was curve fitted from a series of ...

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在高密度pcba组装中，bga（球栅阵列封装）因其优异的电气性能和小型化优势被广泛应用。然而，空洞问题始终困扰着制造工程师。ipc-a-610标准对空洞率设限为25%（局部最大空洞面积占焊点面积），而现实中，很多工厂bga焊点空洞率远超标，造成产品长期可靠性隐患。

The soldering station temperature is 392-896°F adjustable, ... Remove BGA IC safely, keep pins intact. ... The system is equipped with an automatic cold air function, ...

Investigators have solved the cold case murder of a San Jose teacher stabbed to death at Branham High School nearly 50 years ago, naming a teenager who was originally suspected in the crime as the ...

China accused Defense Secretary Pete Hegseth of espousing a “Cold War mentality” in a speech “filled with provocations” in Singapore on Saturday. “Hegseth deliberately ignored the call ...

Nearly 50 years ago a young teacher was found stabbed to death inside a California high school on the first day of summer break. On Monday, cold case investigators identified her killer publicly fo… ...

"Disgusting Abomination": Cold War Between Musk and Trump Explodes Into Public "I’m sorry, but I just can’t stand it anymore." / Future Society / Doge / Donald Trump / Elon Musk ...