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Politics : Formerly About Advanced Micro Devices
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To: Pravin Kamdar who wrote (35192)7/29/1998 2:44:00 PM
From: Yousef  Read Replies (1) of 1572969
 
Pravin,

Re: " If you stick to the same interconnect design rules while switching to
copper, the height of the interconnect can be lowered (30%)...decreasing the
area of the capacitor between parallel lines on the same level."

This is not necessarily the case, Pravin ... Please see my earlier post
on this topic. Basically, Copper thickness control is much worse than
for Aluminum:

Message 5232529

Therefore, one cannot just make the assumption of a 30% - 40% reduction in
Copper thickness. Paul also brings up a good point about the barrier
materials are needed on the sides of the Copper lines thus increasing
the effective Rs ... And again, one needs thicker Copper to offset this
effect.

Hope this helps.

Make It So,
Yousef
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