Abstract:
A laser irradiation device and a method of fabricating an OLED having an increased laser efficiency. The laser irradiation device includes: a light source to produce a laser beam; a collimation lens disposed adjacent to the light source; and an asymmetrical micro lens array disposed adjacent to the collimation lens. The method includes: providing a substrate having a first electrode; providing a donor substrate for laser transfer, including a sequentially stacked a base layer, a light-to-heat conversion layer, and a transfer layer; disposing the donor substrate on the substrate so that the transfer layer faces the substrate; and irradiating a predetermined region of the base layer using a laser irradiation device having a light source, a collimation lens, and an asymmetrical micro lens array, to transfer the transfer layer onto the substrate, and forming an organic layer pattern on the substrate.
Abstract:
A method of fabricating a donor substrate and a method of fabricating an organic light emitting display (OLED) using the donor substrate. The method of fabricating the donor substrate includes preparing a base substrate that includes at least one transfer region and at least one non-transfer region, forming a light-to-heat conversion layer on the base substrate and depositing a transfer layer selectively on the light-to-heat conversion layer and in the at least one transfer region of the base substrate using a shadow mask. To then make the OLED, laser induced thermal imaging is used to transfer the patterned transfer layer from the donor substrate to display regions in an acceptor substrate.
Abstract:
A donor substrate for a laser induced thermal imaging method and an organic light emitting display (OLED) fabricated using the donor substrate are provided. There is also provided a method of fabricating an OLED capable of controlling static electricity when an organic layer is formed using an laser induced thermal imaging method, since the donor substrate having a conductive layer is electrically connected to an earthed stage.
Abstract:
An Organic Light Emitting Display (OLED) and its fabrication method has a pixel defining layer provided on a first electrode which is formed with a gas vent groove to allow gas to vent when the pixel defining layer is being formed, so that gas is not left in a pixel but vented when a donor film is laminated by a Laser-Induced Thermal Imaging (LITI) method, thereby decreasing edge open failures.
Abstract:
A donor substrate for use in an organic light emitting display comprises a base substrate and a transfer layer disposed on the base substrate. A selective heat generation structure is interposed between the base substrate and the transfer layer. The selective heat generation structure has a heat generation region from which heat is generated by light-to-heat conversion and a heat non-generation region contacting the heat generation region. By employing the donor substrate, it is possible to form minute transfer layer patterns with high accuracy without the need to accurately control the width of a laser beam. A fabrication method of an organic light emitting display comprises disposing the donor substrate on an acceptor substrate, irradiating a laser beam onto the donor substrate, and forming a transfer layer pattern on a pixel electrode of the acceptor substrate.
Abstract:
A method of fabricating an organic light emitting display is provided. The method includes repeatedly scanning a laser beam over a predetermined region of a donor substrate with multi-lines in one step using a galvanometer to form an organic layer pattern. The method of the present invention is capable of reducing process time required to form the organic layer pattern and lowering manufacturing cost by repeating multi-line scanning in one step through the laser beam using the galvanometer, when the organic layer pattern is formed using an LITI method.
Abstract:
A donor substrate for a laser induced thermal imaging method and method of fabricating an organic light emitting display device using the same are provided. A transfer layer for a laser induced thermal imaging method is made of an organic material having a molecular weight of 500 to 70,000 to fabricate an organic light emitting display device having a uniform organic layer pattern. The invention also provides a method of fabricating an organic light emitting display device which may achieve a large-sized pixel region as well as improve the productivity of the organic light emitting display device.
Abstract:
A display device includes an underlying layer formed over a substrate; an insulating layer formed over the substrate to expose the underlying layer; and an organic EL layer formed on the exposed portion of the underlying layer, wherein a thickness of the insulating layer is formed to a predetermined thickness to prevent defects in the organic EL layer that can occur in an edge portion of the exposed portion.
Abstract:
A donor film for laser induced thermal imaging method having a base film, a light-to-heat conversion layer formed on the base film, a reflection layer or a metal layer formed on the light-to-heat conversion layer, and a transfer layer formed on the reflection layer and formed of an organic material. The donor film is capable of reducing an edge open defect and increasing The amount of energy absorbed into the light-to-heat conversion layer by forming either the reflection layer or the metal layer between the light-to-heat conversion layer and the transfer layer, preventing damage of the substrate by not transmitting a laser beam to the substrate and prevents deterioration of the transfer layer by preventing gas generated from the light-to-heat conversion layer by heat from penetrating into the transfer layer and dissipating heat transferred to the transfer layer well into the transfer layer.
Abstract:
A thermal transfer element that a radiation absorber contained in a light-to-heat conversion layer has a concentration gradient and laser-transfers an organic thin-film layer. The thermal transfer element includes a base substrate which is a support substrate; a light-to-heat conversion layer formed on the base substrate, converting incident light to heat energy and containing a radiation absorber; and a transfer layer for image formation, wherein the radiation absorber of the light-to-heat conversion layer has a concentration distribution that the concentration is lower as it is closer to the transfer layer. The radiation absorber of the light-to-heat conversion layer has a concentration distribution that the concentration is gradually or stepwise decreased as it is farther from the base substrate and as it is closer to the transfer layer.