Abstract: To provide an electronic device capable of bright image display. A pixel is structured such that a switching TFT and a current controlling TFT are formed on a substrate and an EL element is electrically connected to the current controlling TFT. A gate capacitor formed between a gate electrode of the current controlling TFT and an LDD region thereof holds a voltage applied to the gate electrode, and hence a capacitor (condenser) is not particularly necessary in the pixel, thereby making the effective light emission area of the pixel large.

Abstract: By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 &OHgr;cm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.

Abstract: Two aspects, an impurity factor and a structural factor are assumed as the deterioration causes of an organic light emitting device and means for solving the respective factors are provided. In order to prevent deterioration of the light emitting device, concentrations of moisture and oxygen, which are left in a space in which an organic light emitting element is sealed, are minimized. At the same time, an impurity including oxygen, such as moisture or oxygen which is included in an organic compound composing the organic light emitting element, is reduced. An element structure for preventing the deterioration of the organic light emitting element due to stress is used to suppress the deterioration.

Abstract: To provide an inexpensive EL display device of high definition. An anode, a light emitting layer, and a cathode are formed on a substrate, and selective doping using at least one selected from the group consisting of an alkali metal element, an alkaline earth metal element and a halogen element is then performed to form at least ones of electron transmitting regions and hole transmitting regions. In such a structure, only a part of the light emitting layer, where at least ones of the electron transmitting regions and the hole transmitting regions are formed, emits light when a given voltage is applied to the light emitting layer, whereby images are displayed as desired.

Abstract: To provide an electronic device capable of bright image display. A pixel is structured such that a switching TFT and a current controlling TFT are formed on a substrate and an EL element is electrically connected to the current controlling TFT. A gate capacitor formed between a gate electrode of the current controlling TFT and an LDD region thereof holds a voltage applied to the gate electrode, and hence a capacitor (condenser) is not particularly necessary in the pixel, thereby making the effective light emission area of the pixel large.

Abstract: Two aspects, an impurity factor and a structural factor are assumed as the deterioration causes of an organic light emitting device and means for solving the respective factors are provided. In order to prevent deterioration of the light emitting device, concentrations of moisture and oxygen, which are left in a space in which an organic light emitting element is sealed, are minimized. At the same time, an impurity including oxygen, such as moisture or oxygen which is included in an organic compound composing the organic light emitting element, is reduced. An element structure for preventing the deterioration of the organic light emitting element due to stress is used to suppress the deterioration.

Abstract: By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 &OHgr;cm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.

Abstract: There is provided an electronic device having high reliability and high color reproducibility. A pixel structure is made such that a switching FET (201) and an electric current controlling FET (202) are formed on a single crystal semiconductor substrate (11), and an EL element (203) is electrically connected to the electric current controlling FET (202). The fluctuation in characteristics of the electric current controlling FET (202) is very low among pixels, and an image with high color reproducibility can be obtained. By taking hot carrier measures in the electric current controlling FET (202), the electronic device having high reliability can be obtained.

Abstract: To provide an inexpensive EL display device of high definition. An anode, a light emitting layer, and a cathode are formed on a substrate, and selective doping using at least one selected from the group consisting of an alkali metal element, an alkaline earth metal element and a halogen element is then performed to form at least ones of electron transmitting regions and hole transmitting regions. In such a structure, only a part of the light emitting layer, where at least ones of the electron transmitting regions and the hole transmitting regions are formed, emits light when a given voltage is applied to the light emitting layer, whereby images are displayed as desired.

Abstract: There is provided an electronic device having high reliability and high color reproducibility. A pixel structure is made such that a switching FET (201) and an electric current controlling FET (202) are formed on a single crystal semiconductor substrate (11), and an EL element (203) is electrically connected to the electric current controlling FET (202). The fluctuation in characteristics of the electric current controlling FET (202) is very low among pixels, and an image with high color reproducibility can be obtained. By taking hot carrier measures in the electric current controlling FET (202), the electronic device having high reliability can be obtained.

Abstract: The present invention provides a peeling off method without giving damage to the peeled off layer, and aims at being capable of peeling off not only a peeled off layer having a small area but also a peeled off layer having a large area over the entire surface at excellent yield ratio. The metal layer or nitride layer 11 is provided on the substrate, and further, the oxide layer 12 being contact with the foregoing metal layer or nitride layer 11 is provided, and furthermore, if the lamination film formation or the heat processing of 500° C. or more in temperature is carried out, it can be easily and clearly separated in the layer or on the interface with the oxide layer 12 by the physical means.

Abstract: A semiconductor device in which degradation due to permeation of water and oxygen can be limited, e.g., a light emitting device having an organic light emitting device (OLED) formed on a plastic substrate, and a liquid crystal display using a plastic substrate. A layer to be debonded, containing elements, is formed on a substrate, bonded to a supporting member, and debonded from the substrate. A thin film is thereafter formed on the debonded layer. The debonded layer with the thin film is adhered to a transfer member. Cracks caused in the debonded layer at the time of debonding are thereby repaired. As the thin film in contact with the debonded layer, a film having thermal conductivity, e.g., film of aluminum nitride or aluminum nitroxide is used. This film dissipates heat from the elements and has the effect of preventing deformation and change in quality of the transfer member, e.g., a plastic substrate.

Abstract: An object of the invention is reducing a manufacturing cost of an EL display device and an electronic device equipped therewith. In an active matrix type EL display device, an EL material for a pixel portion is formed by coating steps using a dispenser device. As a discharge port of the dispenser is made into a linear shape, the throughput is increased. Such the dispenser device is used, so that it is possible to simplify the EL layer forming steps, then, to reduce the manufacturing cost.

Abstract: Plurality of pixels (102) are arranged on the substrate. Each of the pixels (102) is provided with an EL element which utilizes as a cathode a pixel electrode (105) connected to a current control TFT (104). On a counter substrate (110), a light shielding film (112) is disposed at the position corresponding to periphery of each pixel (102), while a color filter (113) is disposed at the position corresponding to each of the pixels (102). This light shielding film makes the contour of the pixels clear, resulting in an image display with high definition. In addition, it is possible to fabricate the EL display device of the present invention with most of an existing manufacturing line for liquid crystal display devices. Thus, an amount of equipment investment can be significantly reduced, thereby resulting in a reduction in the total manufacturing cost.

Abstract: An object of the invention is to reduce the manufacturing cost of EL display devices and electronic devices incorporating the EL display devices.

Abstract: A deposition apparatus is provided for manufacturing an organic compound layer having a plurality of function regions. The deposition apparatus includes a plurality of evaporation sources within a deposition chamber, for enabling continuous formation of respective function regions comprised of organic compounds and, further, formation of a mixed region at an interface between adjacent ones of the function regions. With the deposition apparatus having such fabrication chamber, it is possible to prevent impurity contamination between the functions regions and further possible to form an organic compound layer with an energy gap relaxed at the interface.

Abstract: To provide an electronic device capable of bright image display. A pixel is structured such that a switching TFT and a current controlling TFT are formed on a substrate and an EL element is electrically connected to the current controlling TFT. A gate capacitor formed between a gate electrode of the current controlling TFT and an LDD region thereof holds a voltage applied to the gate electrode, and hence a capacitor (condenser) is not particularly necessary in the pixel, thereby making the effective light emission area of the pixel large.

Abstract: A cover member 107 is adhered onto a substrate 101 on which an EL element is formed with a filler 208 as an adhesive. Further, a sealing member 209 is provided so as to cover a side surface (an exposing surface) of the filler 208, and a frame member 108 is adhered using the sealing member 209. With this structure, the EL element is completely sealed by the filler 208, and shut from moisture and the like from the outside. Thus, deterioration of an EL layer due to oxidization can be prevented.

Abstract: Plurality of pixels (102) are arranged on the substrate. Each of the pixels (102) is provided with an EL element which utilizes as a cathode a pixel electrode (105) connected to a current control TFT (104). On a counter substrate (110), a light shielding film (112) is disposed at the position corresponding to periphery of each pixel (102), while a color filter (113) is disposed at the position corresponding to each of the pixels (102). This light shielding film makes the contour of the pixels clear, resulting in an image display with high definition. In addition, it is possible to fabricate the EL display device of the present invention with most of an existing manufacturing line for liquid crystal display devices. Thus, an amount of equipment investment can be significantly reduced, thereby resulting in a reduction in the total manufacturing cost.

Abstract: An object of the invention is reducing a manufacturing cost of an EL display device and an electronic device equipped therewith. In an active matrix type EL display device, an EL material for a pixel portion is formed by coating steps using a dispenser device. As a discharge port of the dispenser is made into a linear shape, the throughput is increased. Such the dispenser device is used, so that it is possible to simplify the EL layer forming steps, then, to reduce the manufacturing cost.