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Politics : Formerly About Advanced Micro Devices
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To: milo_morai who wrote (89932)1/27/2000 1:40:00 AM
From: Maxwell  Read Replies (2) of 1572619
 
Hi Milo_Morai:

<<Copper has 40% less resistance(and thus lowers Impedance) than Aluminum therefore it produces less heat and drops less voltage which in turn drops power consumption.>>

It turns out that the transistors are doing most of the power dissipation not the interconnect. Drive current has to push transistor impedance as well as interconnect impedance. Transistor impedance dominates interconnect impedance (or resistance) at 0.18um. Thus that is why copper K7 doesn't show much in speed enhancement over aluminum K7.
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