Process for preparing a thin film electroluminescent device

Details Process for preparing a thin film electroluminescent device Process for preparing a thin film electroluminescent device

1991-01-08

1992-09-15

Pianalto, Bernard

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427253, 4272552, B05D 306

Patent

active

051476835

ABSTRACT:
Disclosed is an improvement of the chemical vapor deposition (CVD) process for preparing an electroluminescent device having a large area and a large size. The process includes forming a luminescent layer on a substrate by a reduced-pressure chemical vapor deposition method wherein a source material gas is introduced into a reaction chamber. The reaction chamber includes a screening means which screens the source material gas flow in the chamber to form a first area in which the gas is flowing and a second area in which the gas substantially does not flow. The screening means has apertures for connecting the first area and second area. the substrate is placed in the second area, to which the source material is supplied by means of gas diffusion.

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