Forming homogeneous mixtures of organic materials for physical vapor deposition using dry mixing
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United States of America Patent
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Issued Date -
Mar 17, 2005
app pub date -
Sep 16, 2003
filing date -
Sep 16, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Powdered organic material s are mixed to form a homogeneous mixture, which includes, at least one dopant component and one host component, to form a pellet for use in thermal physical vapor deposition to produce an organic layer on a substrate for use in an organic light-emitting device. The method of mixing includes, combining organic materials in a powder form and placing the powder organic materials in a container, heating the container in a range of temperatures from 40 to 100.degree. C. for 30 to 100 minutes while purging the atmosphere in the container to a reduced pressure in a range from 10.sup.-1 to 10.sup.-3 Torr to remove moisture. Filling the container with an inert atmosphere, mixing the powder organic materials in the inert atmosphere to form a homogeneous mixture of powder organic materials, and compacting the homogenous mixture of powder organic materials to form a pellet.
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