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hem_wall
Joined: 11 Sep 2008
Posts: 7
Helped: 3
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 11 Sep 2008 10:13 silicon is used more than germanium? |
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| can u please tell why silicon is used in all applications then germanium
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A.Anand Srinivasan
Joined: 15 Oct 2005
Posts: 1792
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Location: India
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11 Sep 2008 13:12 why silica is used more compared to germanium |
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| silicon is less noisy compared to germanium and mostly importantly it is much more easily available...
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Paramjyothi
Joined: 09 Jul 2008
Posts: 30
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12 Sep 2008 6:48 why is silicon used over germanium |
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Hello,
The advantages of Si over Ge are:
=> Stable and strong material & crystal structure like diamond
=> Si has a wider bandgap than Ge
=> higher operating temperature (125-175 oC vs. ~85 oC) and thus become intrinsic at higher temp.
=> Si readily forms a native oxide (SiO2) high-quality insulator protects and “passivates” underlying circuitry helps in patterning useful for dopant masking.
=>Large variety of process steps possible without the problem of decomposition (as in the case of compound semiconductors)
=> Si is cheap and abundant
Paramjyothi
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12 Sep 2008 6:48 Ads |
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deepak242003
Joined: 24 Dec 2008
Posts: 204
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15 Jul 2009 12:05 what are the advantages of si and germanium |
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| hem_wall wrote: |
| can u please tell why silicon is used in all applications then germanium |
benefit is :
naturally available,
form oxide when exposed to air under controled temperature.. which can be used as dielectric....
can handle high temperature...
If anybody know other advantages??
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erikl
Joined: 09 Sep 2008
Posts: 736
Helped: 139
Location: Germany
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15 Jul 2009 12:56 silicon used germanium |
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Silicon is the second most abundant material in the Earth's crust (nearly 26%, s. http://en.wikipedia.org/wiki/Silicon ).
It's the best controlled material of the world, both in terms of available purity (impurity levels down to 1e-14) and of processing accuracy. And it's a semiconductor 
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kumarghz
Joined: 25 Nov 2006
Posts: 48
Helped: 3
Location: Penang, malaysia
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15 Jul 2009 13:12 why is silicon used instead of germanium |
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silicon ingot is simple to process compare to germanium. In other word silicon is cheaper.
regards,
kumar
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sutapanaki
Joined: 02 Nov 2001
Posts: 580
Helped: 33
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15 Jul 2009 23:09 why silicon is mostly used compared to germanium |
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| As pointed above Si has many advantages. The one that makes it preferable in mass production is the good SiO2 - the single most important property. Forming good oxide is paramount in the production of ICs.
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