Author: Christophe Theron
Date: 08:35:28 05/27/99
Go up one level in this thread
On May 26, 1999 at 23:33:43, Robert Hyatt wrote:
>On May 26, 1999 at 20:35:05, Christophe Theron wrote:
>
>>On May 26, 1999 at 13:57:08, Robert Hyatt wrote:
>>
>>>On May 26, 1999 at 13:36:06, Dann Corbit wrote:
>>>
>>>>On May 26, 1999 at 12:38:05, Charles Unruh wrote:
>>>>
>>>>>Will such chips have special housings?
>>>>No, but they'll come with a free voucher for cataract surgery.
>>>>;-)
>>>
>>>
>>>Also if you set a russet potato down by the case, in 5 minutes you
>>>will have a baked potato. :)
>>>
>>>A couple of serious points...
>>>
>>>1. No one knows what is going to happen at 1ghz yet. One thing that
>>>has been seen is 'atom migration' where at such frequencies, material on
>>>the chip physically moves around. The effect on ICs is unknown at present.
>>>
>>>2. HAM radio folks know (as do those having had a physics course that covers
>>>electricity and magnetism) that at 1ghz frequencies, electrical properties
>>>change significantly (ie check out coax cable used for normal RF frequencies
>>>rather than the waveguides used for microwave frequencies). What happens inside
>>>at these frequencies is going to be interesting to find out. Ie yes it _can_
>>>be done, but _do_ we really want to do it? :)
>>>
>>>That was one of many issues that prevented Seymour Cray from producing a 1ghz
>>>machine before his death. 1ghz is _tough_. And 2 ghz is _really tough_.
>>
>>What about problems with the GSM cellular phones frequencies?
>>
>>Standard GSM uses 128 frequencies in the range 890-915MHz, and 935-960MHz (close
>>to 1GHz), and in the USA frequencies around 1.8GHz are used too.
>>
>>
>> Christophe
>
>
>whatis missing is that you don't find .18 micron stuff in a cellular phone.
>small gates have interesting problems. Have seen a couple of interesting papers
>on this problem of 'molecular mobility' and its effects on IC semiconductors.
>Nothing said it is a killer problem, but nothing says it can be ignored either.
>This will be interesting to watch.
Oh, you are right.
But I was only talking about interferences between fast computers and the
cellular phone network. I was wondering if this could be a serious problem in 3
or 4 years, when we will all have near-1GHz computers.
Christophe
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