The four-layer diode was the key to William Shockley's plan to revolutionize AT&T's phone system. It was a great device in theory, but not in practice -- at least not at the time when Shockley ...

For context, the new G5 OLED LG debuted gets brighter than last year’s model, but without the benefit ... we had strong suspicions it was a new four-layer OLED panel technology.

Tech On attended the unveiling in Japan and described the makeup of Toyota's prototype battery like this: Four sets of positive electrode layers, solid electrolyte layers and negative electrode ...