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why in a transistor collector region is larger than th other regions?

All the references I see on line are simply derived from this one article on Wikipedia. I am beginning to think that they are just the result of some theoretical work. Does this article violate the "No Original Work" principle of Wikipedia? Davide Andrea 22:39, 24 August 2007 (UTC) reply

yeah, it exists;

• United States Patent 5323028
• Muhammad H. Rashid, Power Electronics Handbook, p135, Academic Press, 2001 ISBN  0125816502.

SpinningSpark 22:54, 21 February 2009 (UTC) reply