Hafnium-based CPU and heat sink

Hafnium-based CPU and heat sink

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Credit: SCIENCE PHOTO LIBRARY

Caption: Hafnium-based CPU and heat sink. This computer central processing unit (CPU) is the square element (green and gold), mounted on a larger metal heat sink (grey). The visible surface is the underside of the CPU, with numerous contact pins (gold plated) forming a grid around the central microchip area. This Xeon microprocessor from Intel uses advanced hafnium-based metal-gate transistor microchip technology that was announced in 2007. These microchips use the transition metal hafnium (Hf) in the insulating layer in the transistors on the silicon (Si) microchips, allowing reduction in size to the 45-nanometre scale.

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