6 replies
umi
about 13 years ago
shona
about 13 years ago
abani
about 13 years ago

"A semiconductor is created primarily by silicon. Silicon is a substance that has four electrons in its outer electron shell, making it very suitable for creating crystals. When you introduce an ""impure"" substance, such as boron or gallium in small doses, it causes the crystal to become unstable.
Source: http://in.docsity.com/en-docs/Conductor_-_Engineering_Geology_-_Lecture_Slides_"
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