Patent ID: 11946131
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H  B  Y | IPC B  C  H

Claim 0:
1. A source cell for providing a material to be deposited via vapor deposition, the source cell comprising:
a first material crucible comprising:
a leading edge and a rear edge;
a depression disposed between the leading edge and the rear edge of the first material crucible for holding a first material;

a carrier gas inlet disposed adjacent to the leading edge of the first material crucible;
a carrier gas outlet disposed adjacent to the rear edge of the first material crucible;
a first plurality of heaters configured to set a first temperature gradient across the depression of the first material crucible, the first temperature gradient comprising:
a first temperature adjacent to the leading edge of the first material crucible; and
a second temperature, at least 20 K higher than the first temperature, adjacent to the rear edge of the first material crucible;

a second material crucible disposed downstream from the first material crucible, the second material crucible comprising:
a leading edge and a rear edge;
a depression disposed between the leading edge and the rear edge of the second material crucible for holding a second material; and
a first vent in fluid communication with the carrier gas outlet of the first material crucible; and
a second plurality of heaters configured to set a second temperature gradient across the depression of the second material crucible independently of the first temperature gradient across the first material crucible, the second temperature gradient comprising:
a first temperature adjacent to the leading edge of the second material crucible; and
a second temperature, at least 20 K higher than the first temperature, adjacent to the rear edge of the second material crucible.