Light emitting device and a method of manufacturing the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Masaaki Hiroki, Takeshi Fukunaga
Life of this patent
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Abstract
To provide a light emitting device having a highly definite pixel portion. An anode (102) and a bank (104) orthogonal to the anode (102) are formed on an insulator (101). A portion of the bank (104) (controlling bank 104b) is made of a metal film. By applying a voltage thereto, an electric field is formed, and a track of an EL material that is charged with an electric charge can be controlled. Thus, it becomes possible to control a film deposition position of an EL layer with precision by utilizing the above method.
Claims28
A light emitting device comprising:
- at least one thin film transistor on an insulating surface;
- an anode electrically connected to said thin film transistor;
- a cathode provided opposite said anode;
- and
- a luminous material provided between said anode and said cathode,
- wherein said anode is surrounded by a bank, and a portion of said bank contains a metal film.
A light emitting device comprising:
- at least one thin film transistor on an insulating surface;
- an anode electrically connected to said thin film transistor;
- a cathode provided opposite said anode;
- and
- a luminous material provided between said anode and said cathode,
- wherein said anode is surrounded by a bank, and said bank is formed of a lamination of an insulating film and a metal film.
A light emitting device comprising:
- at least one thin film transistor on an insulating surface;
- a cathode electrically connected to said thin film transistor;
- an anode provided opposite said cathode;
- and
- a luminous material provided between said cathode and said anode,
- wherein said cathode is surrounded by a bank and a portion of said bank contains a metal film.
A light emitting device comprising:
- at least one thin film transistor on an insulating surface;
- a cathode electrically connected to said thin film transistor;
- an anode provided opposite said cathode;
- and
- a luminous material provided between said cathode and said anode,
- wherein said cathode is surrounded by a bank, and said bank is formed of a lamination of an insulating film and a metal film.
A method of manufacturing a light emitting device, comprising the steps of:
- forming at least one thin film transistor on an insulating surface;
- forming a pixel electrode electrically connected to said thin film transistor;
- forming a bank so as to surround said pixel electrode;
- and
- forming an EL material over said pixel electrode while charging a portion of said bank with a negative or positive charge.
A method of manufacturing a light emitting device, comprising the steps of:
- forming at least one thin film transistor on an insulating surface;
- forming a pixel electrode electrically connected to said thin film transistor;
- forming a bank so as to surround said pixel electrode;
- and
- while charging a portion of said bank with a negative or positive charge, forming an EL material charged to have a same polarity as said bank over said pixel electrode.
A method of manufacturing a light emitting device, comprising the steps of:
- forming at least one thin film transistor on an insulating surface;
- forming a pixel electrode electrically connected to said thin film transistor;
- forming a bank composed of a lamination of an insulating film and a metal film so as to surround said pixel electrode;
- and
- forming an EL material over said pixel electrode while charging said metal film with a negative or positive charge.
A method of manufacturing a light emitting device, comprising the steps of:
- forming at least one thin film transistor on an insulating surface;
- forming a pixel electrode electrically connected to said thin film transistor;
- forming a bank composed of a lamination of an insulating film and a metal film so as to surround said pixel electrode;
- and
- while charging said metal film with a negative or positive charge, forming an EL material charged to have a same polarity as said metal film over said pixel electrode.
Dependencies are inferred from the claim text.