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Yellow World

Inside Western Digital: How Tomorrow's Storage Gets Made
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Yellow World

In the following images, you’ll immediately notice that everything is yellow. We could have color corrected this to make the images clearer, but this is how things actually look in a manufacturing area that produces semiconductor wafer-based microsystems. Part of the manufacturing process involves photolithography, which requires the exposure of photoresist to certain light wavelengths. This is much like photography, wherein if you expose undeveloped film to regular white light, it will destroy the film. The wafer’s photoresist doesn’t react to yellow light, so wide swaths of this facility exist in this dimmed, surreal state. Specifically, the fluorescent lighting seen throughout this area is filtered to eliminate blue and ultraviolet wavelengths, instead focusing on light in the roughly 550 to 650nm range.

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