Patent ID: 6524958
Filing Date: 2003-02-25
Classification: G02F,H01L

Abstract:
A method of producing a bottom gate thin film transistor, comprising:forming a gate electrode on an insulating substrate; forming a gate insulating film over the gate electrode; forming a first semiconductor thin film having a channel therein over the gate insulating film; forming a second semiconductor thin film for a source and a drain over the first semiconductor thin film; forming the stacked layers of the first semiconductor thin film and the second semiconductor thin film into an island; subsequent to said forming stacked layers into an island, depositing a source/drain electrode metal over the stacked layers of the first semiconductor thin film and the second semiconductor thin film; etching a region of the deposited source/drain electrode metal, the region being located above the channel, in the depth direction to expose the second semiconductor thin film, whereby a source electrode and a drain electrode are formed; and etching away the exposed portion of the second semiconductor thin film in the depth direction with the use of a non-ionic excited species to form a channel, the non-ionic excited species being generated by bringing molecules of a chemical substance into contact with a metal heated by electric resistance heating to decompose the molecules of the chemical substance.