Organic Light Emitting Diode Display Device and Method of Fabricating the Same

A method for fabricating an organic light emitting diode (OLED) display device, the method comprising:

• (a) forming a first electrode on a substrate;
• (b) applying a photosensitive resin to the entire surface of the substrate to form a first photosensitive resin layer;
• (c) selectively exposing and developing the first photosensitive resin layer to form a first photosensitive resin pattern made of the photosensitive resin at a position other than a position where a first light emitting layer is to be formed;
• (d) depositing a first organic film on the first photosensitive resin pattern in a state in which the first photosensitive resin pattern remains;
• (e) removing the first organic film deposited on an upper portion of the first photosensitive resin pattern together with the first photosensitive resin pattern through a lift-off process to form a first light emitting layer formed of the first organic film on the substrate;
• (f) forming a second light emitting layer formed of a second organic film on the substrate through the same processes as (b) to (e);
• (g) depositing a third organic film on the entire surface of the substrate with the first light emitting layer and the second light emitting layer formed thereon;
• and
• (h) forming a second electrode on the substrate.

A method for fabricating an organic light emitting diode (OLED) display device, the method comprising:

• forming a first electrode on a substrate;
• forming a first hole injection layer, a first hole transport layer, a first light emitting layer, a first electron transport layer, and a first buffer layer in a laminated manner on the substrate through a first photo process;
• forming a second hole injection layer, a second hole transport layer, a second light emitting layer, a second electron transport layer, and a second buffer layer in a laminated manner on the substrate through a first photo process;
• forming a third hole injection layer, a third hole transport layer, a third light emitting layer, a third electron transport layer, and a third buffer layer in a laminated manner on the substrate through a first photo process;
• and
• forming a second electrode on the first, second, and third buffer layers,
• wherein the first, second, and third buffer layers are made of a metal oxide.

A method for fabricating an organic light emitting diode (OLED) display device, the method comprising:

• (a) forming a first electrode on a substrate;
• (b) applying a photosensitive resin to the entire surface of the substrate to form a first photosensitive resin layer;
• (c) selectively exposing and developing the first photosensitive resin layer to form a first photosensitive resin pattern made of the photosensitive resin at a position other than a position where a first light emitting layer is to be formed;
• (d) depositing a thin film for a first hole injection layer, a thin film for a first hole transport layer, a first organic film, a thin film for a first electron transport layer, and a thin film for a first buffer layer in a state in which the first photosensitive resin pattern remains;
• (e) removing the thin film for a first hole injection layer, the thin film for a first hole transport layer, the first organic film, the thin film for a first electron transport layer, and the thin film for a first buffer layer deposited on an upper portion of the first photosensitive resin pattern together with the first photosensitive resin pattern through a lift-off process to form a first hole injection layer, a first hole transport layer, a first light emitting layer, a first electron transport layer, and a first buffer layer, which are formed of thin film for a first hole injection layer, the thin film for a first hole transport layer, the first organic film, the thin film for a first electron transport layer, and the thin film for a first buffer layer, respectively, on the substrate;
• (f) forming a second hole injection layer, a second hole transport layer, a second light emitting layer, a second electron transport layer, and a second buffer layer through the same processes as (b) to (e);
• (g) forming a third hole injection layer, a third hole transport layer, a third light emitting layer, a third electron transport layer, and a third buffer layer through the same processes as (b) to (e);
• and
• (h) forming a second electrode on the first, second, and third buffer layers,
• wherein the first, second, and third buffer layers are made of a metal oxide.

A method for fabricating an organic light emitting diode (OLED) display device, the method comprising:

• (a) forming a fourth electrode on a substrate;
• (b) forming a first organic film and a first conductive film on the substrate with the fourth electrode formed thereon;
• (c) applying a photosensitive resin to the entire surface of the substrate with the first conductive film formed thereon to form a first photosensitive resin layer;
• (d) selectively exposing and developing the first photosensitive resin layer to form a first photosensitive resin pattern made of the photosensitive resin at a position at which a first light emitting is to be formed;
• (e) selectively removing the first conductive film by using the first photosensitive resin pattern as a mask to form a first electrode;
• (f) removing the first photosensitive resin pattern and simultaneously selectively removing the underlying exposed first organic film by using the first electrode as a mask to form a first light emitting layer formed of the first organic film;
• (g) forming a second light emitting layer and a second electrode on the substrate through the same processes as (b) to (f);
• and
• (h) forming a third light emitting layer and a third electrode on the substrate through the same processes as (b) to (f).

An organic light emitting diode (OLED) display device comprising:

• a first electrode formed on a substrate;
• a hole injection layer and a hole transport layer formed on the substrate with the first electrode formed thereon;
• a first light emitting layer formed of a first organic film on the substrate with the hole injection layer and the hole transport layer formed thereon;
• a second light emitting layer formed of a second organic film on the substrate with the first light emitting layer formed thereon;
• a third light emitting layer formed by depositing a third organic film on the entire surface of the substrate with the first light emitting layer and the second light emitting layer formed thereon;
• and
• an electron injection layer and a second electrode formed on the third light emitting layer.

An organic light emitting diode (OLED) display device comprising:

• a first electrode formed on a substrate;
• a first hole injection layer, a first hole transport layer, a first light emitting layer, a first electron transport layer, and a first buffer layer laminated on the substrate;
• a second hole injection layer, a second hole transport layer, a second light emitting layer, a second electron transport layer, and a second buffer layer laminated on the substrate;
• a third hole injection layer, a third hole transport layer, a third light emitting layer, a third electron transport layer, and a third buffer layer laminated on the substrate;
• and
• a second electrode formed on the first, second, and third buffer layers, wherein the first, second, and third buffer layers are made of a metal oxide.