The tungsten wire ball probe plays an important role in electron microscope testing. As one of the electron sources, it can provide high-energy electron beams to excite the sample surface and generate images. The following is a detailed explanation of the role of tungsten ball probes in electron microscopy testing:
An electron microscope is an instrument that uses a beam of electrons to scan the surface of a sample to obtain an image. Its main difference from an optical microscope is that an electron microscope uses an electromagnetic lens to focus an electron beam, and the wavelength of the electron beam is much shorter than that of photons, allowing higher resolution images to be obtained. In electron microscopes, tungsten filament ball probes are used as one of the electron sources to generate high-energy electron beams to scan the sample surface.
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