ʻO ka loina hana o ke ʻano hoʻonui kaila N-MOSFET

(1) Ka hopena hoʻomalu o vGS ma ka ID a me ke kahawai

① Ka hihia o vGS=0

Hiki ke ʻike ʻia aia ʻelua mau hui PN hope-to-back ma waena o ke kahawai d a me nā kumu s o ke ʻano hoʻonui.MOSFET.

Ke hoʻohui ʻia ka volta kumu-puka vGS=0, ʻoiai ke hoʻohui ʻia ka volta puna wai vDS, a me ka nānā ʻole i ka polarity o vDS, loaʻa mau kahi hui PN i ka mokuʻāina hoʻohuli.ʻAʻohe kaila conductive ma waena o ke kahawai a me ke kumu, no laila ke kahawai ID≈0 i kēia manawa.

② Ka hihia o vGS>0

Inā vGS>0, hoʻokumu ʻia kahi kahua uila ma ka papa insulating SiO2 ma waena o ka puka a me ka substrate.ʻO ke kuhikuhi o ke kahua uila he perpendicular i ke kahua uila i kuhikuhi ʻia mai ka ʻīpuka a i ka substrate ma ka ʻili semiconductor.Hoʻopau kēia kahua uila i nā puka a huki i nā electrons.Hoʻokuʻu ʻia nā lua: Hoʻokuʻu ʻia nā puka o ka substrate P-type kokoke i ka ʻīpuka, e waiho ana i nā iona ʻae ʻae ʻole (nā ion ʻino) e hana i kahi papa hoʻopau.E huki i nā electrons: Ua huki ʻia nā electrons (nā mea lawe liʻiliʻi) i ka substrate P-type i ka ʻili o ka substrate.

(2) Ka hoʻokumu ʻana o ke kahawai conductive:

Ke liʻiliʻi ka waiwai vGS a ʻaʻole ikaika ka hiki ke huki i nā electrons, ʻaʻohe ala conductive ma waena o ke kahawai a me ke kumu.Ke piʻi aʻe nei ka vGS, ʻoi aku ka nui o nā electrons i ka papa honua o ka substrate P.Ke hiki i ka vGS i kekahi waiwai, hana keia mau electrons i ka N-type thin layer ma ka ili o ka P substrate kokoke i ka puka a ua pili i na aina N+ elua, e hana ana i N-type conductive channel ma waena o ke kahawai a me ke kumu.He kūʻē kona ʻano conductivity me ka substrate P, no laila ua kapa ʻia ʻo ia he papa hoʻohuli.ʻOi aku ka nui o ka vGS, ʻoi aku ka ikaika o ke kahua uila e hana ana ma ka ʻili semiconductor, ʻoi aku ka nui o nā electrons i huki ʻia i ka ʻili o ka substrate P, ʻoi aku ka mānoanoa o ke kahawai conductive, a ʻoi aku ka liʻiliʻi o ke kūʻē o ke kahawai.Ua kapa ʻia ka volta puka-puna i ka wā e hoʻomaka ai ke kahawai ʻo ka volta hoʻohuli, i hōʻike ʻia e VT.