With the development of ball grid array (BGA), the strength of BGA becomes important. High speed single solder ball test is one effective method to test BGA strength. This design provides one machine to test single sold ball strength at high speed. The advantage of this design is multi-solder balls .....
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It is very difficult to shield low frequency sound waves. This is mainly because in order to cause wave scattering or reflection, the usual wisdom is that the size of the scatterers must be on the order of the wavelength. Since low frequency sound has long wavelength, it follows that the shielding m.....
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The present invention presents the construction of electrodes for liquid-crystal cells using metal-induced laterally crystallized (MILC) polycrystalline silicon (Poly-Si), and the integration of these electrodes in the construction of thin-film transistors. MILC poly-Si. This is shown to possess ad.....
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