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- From: page@student.physics.upenn.edu (Chris Page)
- Newsgroups: alt.fan.pratchett
- Subject: Re: TP research
- Message-ID: <page-221292155421@whitedwarf.sas.upenn.edu>
- Date: 22 Dec 92 20:57:20 GMT
- References: <memo.825134@cix.compulink.co.uk> <Bzo62p.Iov@apollo.hp.com>
- Sender: news@netnews.upenn.edu
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- Organization: University of Pennsylvania
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- Nntp-Posting-Host: whitedwarf.sas.upenn.edu
-
- In article <Bzo62p.Iov@apollo.hp.com>, johnf@apollo.hp.com (John Francis)
- wrote:
- >
- > The most obvious impurities found in silicon would be the ones that cause
- > silicon to function as a semiconductor in the first place. [Examples would
- > be Phosphorus and Alumin(i)um]. Presumable excesive quantities of these
- > additives would interfere with the functioning of semiconductor devices.
- > Bearing in mind the fact that addition of these elements to silicon is
- > refered to as 'doping', I think we have found the troll equivalent of a drug.
- >
-
- Yes, enough of the dopant will turn a semiconductor into an insulator - but
- first you have to get the impurity inserted in. Also, I think that at
- first adding dopant might increase the conductivity giving more donor/hole
- pairs. As to how to get it in there, how about acid? (leaving plently of
- pun latitude as well) Sulfuric or hydrochloric acid would mess up the
- outside of a troll pretty bad, but I think there might be such a thing
- as phosphiric acid. Having no experience in chemistry, however, I'm not
- sure.
-
- -Chris Page
- page@student.physics.upenn.edu
-