Vacuum-evaporation source, and organic EL element manufacturing apparatus

Abstract

This aims to improve the heat controllability of an evaporation container (9) of a vacuum-evaporation source. This vacuum-evaporation source (3) comprises the evaporation container (9) having an organic material (21) arranged therein, and a heater wire (18) wound on the outer circumference of the evaporation source (3). The organic material (21) is arranged such that its portion to contact the sidewall of the evaporation container (9) is below the lower end of the heater wire (18), and a substrate (20) is attached to a substrate holder (4). When a power source (7) is started so that the heater wire (18) generates heat to heat the evaporation container (9), the vapor of the organic material (21) is released from an upward through hole (31) to the inside of a vacuum bath (2), so that it sticks to the substrate (20) thereby to form a thin film. The heater wire (18) is arranged up to the upper end of the evaporation container (9), so that it can heat the opening to an evaporation temperature or higher. The evaporation container (9) is made of a metal material selected from at least one kind of copper, an alloy of copper and beryllium, Ti and Ta, and is formed to have a side wall and abottom wall of a thickness of 0.3 mm to 0.7 mm. Thus, the vacuum-evaporation source (3) has a small heat capacity and excellent controllability.

Description

technical field [0001] The present invention relates to a vapor deposition source and a device using the vapor deposition source. Background technique [0002] Conventionally, a graphite vessel has been used as an evaporation vessel (crucible) of a vapor deposition apparatus. Since the graphite crucible requires a certain wall thickness, the crucible becomes heavy and has a large heat capacity. [0003] Therefore, the temperature responsiveness of the crucible is poor, and it is difficult to accurately control the temperature of the vapor deposition material in the crucible. In addition, when filling the crucible with an organic material as a vapor deposition material, depending on the type of the organic material, the organic material may infiltrate into the crucible. [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2005-97730 Contents of the invention [0005] The problem to be solved by the invention [0006] The present invention was made in or...

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Problems solved by technology

[0003] Therefore, the temperature responsiveness of the crucible is poor, and it is difficult to accurately control the temperature of the vapor deposition material in the crucible.

In addition, when filling the crucible with an organic material as a vapor deposition material, depending on the type of organic material, the organic material may infiltrate into the crucible.

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