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The PlayStation 3's launch was delayed a year after the Xbox 360 was released, supposedly because of a short supply of blue laser diodes, a "$0.05 component" that were used on the system's Blu-ray drive to read Blu-ray discs. Former PlayStation executive Phil Harrison elaborated:

"In this particular case, the shift from red laser to blue laser was actually quite a sophisticated change in the way that the optical head on a drive worked, and it was a little bit of physics and a little bit of chemistry mixed together, because it's really a crystal that you're making. And they just couldn't make enough."

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