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TFix XBOX GPU Reballing and BGA site cleaning using JBC Soldering Iron
Автор: TFix
Загружено: 2014-04-08
Просмотров: 14391
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www.tfix.co.uk
With most tilt and roll devices, flux is screen-printed onto the pads. Sphere migration may be limited by printing on the pads only, but some systems recommend covering the entire BGA pad side with flux rather than a screen print method. The BGA is then placed under a screen matching the component's sphere pattern. Some devices have the spheres go through the screen and onto the pad and flux immediately. Other devices have a stop plate of sorts to keep spheres from dropping through. The operator would pour spheres onto the screen and tilt things around until spheres drop into each aperture.
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