Patent ID: 7369758
Filing Date: 2008-05-06
Classification: C23C,C30B

Abstract:
1. A molecular beam source for evaporating an organic material and accumulating a thin film of the organic material on a film-forming substrate, comprising: a vapor generating source for generating molecules of the organic material, the vapor generating source comprising a crucible for containing the organic material, a first heater provided around the crucible for heating and vaporizing the organic material and a valve for controlling the flow rate of the vaporized organic material to a molecule discharge chamber, the valve comprising a valve seat having a molecule pass opening and a plunger for regulating the flow of the vaporized organic material through the molecule pass opening to an introduction passage disposed orthogonal to the crucible; a molecule discharge chamber in communication with the introduction passage and comprising a cylindrical molecule heater chamber communicating with the introduction passage and a second heater provided around the molecule heater chamber for heating molecules of the vaporized organic material passing therethrough; an exterior guide provided at an end of the molecule discharge chamber and comprising an inner wall which gradually tapers outward as it extends away from the molecule discharge chamber and terminates at a molecule discharge opening; an interior guide disposed opposite to the exterior guide and having an exterior wall surface having a slope identical to the slope of the inner wall surface of the exterior guide, the exterior wall surface of the inner guide and the interior wall surface of the exterior guide forming a molecule discharge passage therebetween extending from the molecule heater chamber to the molecule discharge opening, and the interior guide being adjustable in position relative to the exterior guide to adjust the size of the molecule discharge opening; a cooling/heating unit disposed outside of the exterior guide comprising a third heater for heating the exterior guide and the molecule discharge passage and a cooler for cooling the exterior guide; a fourth heater provided in the interior guide for heating the interior guide and the molecule discharge passage, the fourth heater having a higher winding density than the second heater; and a fifth heater provided in the molecule discharge passage and extending between the interior guide and the exterior guide for heating the molecule discharge passage.