Coating method, coating equipment and light emitting device
A coating method and a technology of light-emitting devices, which are applied in the direction of electric solid-state devices, semiconductor devices, replication/marking methods, etc., can solve the problems of difficult ink deployment, expensive equipment, nozzle clogging, etc., so as to prevent nozzles from being easily clogged and reduce The effect of the probability of nozzle outlet
Active Publication Date: 2018-11-09
NANJING TECH CORP LTD
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Problems solved by technology
If the inkjet printing equipment is to achieve precise area coating, the equipment cost will be very expensive, and ink deployment is also a difficult point. If the equipment and ink do not match, the printed droplets will have many scattered points, that is, there will be many spots around the main droplet. A lot of small droplets will cause substrate contamination, and the printing volume cannot be controlled stably. In addition, when printing stops, the nozzle will be clogged due to solvent volatilization
Method used
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[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0028] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...
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Abstract
The invention discloses a coating method, coating equipment and a light emitting device. The coating method includes: determining that the lowermost end of the droplet emerging from the microneedle reaches the first position, then controlling the liquid supply device to stop supplying liquid to the microneedle; determining that the distance from the end of the microneedle to the substrate reaches a second distance, wherein, The second distance is preset; the liquid supply device is controlled to continue to supply liquid, and the microneedle is controlled to move relative to the substrate to coat the pattern. The invention provides a better pattern forming scheme, thereby avoiding the technical problem that the inkjet printing equipment in the prior art is easy to cause the nozzles to be easily blocked.
Description
technical field [0001] The invention relates to the field of electronic devices, in particular to a coating method, coating equipment and a light emitting device. Background technique [0002] With the vigorous development of the flat panel display industry, people are increasingly pursuing high-quality picture quality, and a new generation of display technology represented by organic light-emitting diodes (Organic Light-Emitting Diode, OLED) has attracted extensive attention. OLEDs are also attractive for their thinness, flexibility, and wide viewing angles. However, the production of OLEDs based on vacuum thermal evaporation consumes a lot of energy, and the size deviation of large-size masks affects color accuracy. In contrast, quantum dot light-emitting diodes (Quantum Dots Light-Emitting Diode, QLED) fabricated by wet coating process with quantum dot solution obviously have more advantages. [0003] At present, the relatively mature wet coating process such as spin coa...
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IPC IPC(8): B41J2/01B41M5/00H01L51/00H01L51/56H10K99/00
CPCB41J2/04B41M5/0047H10K71/12B41J2/165B05C11/1018B05C5/02H10K71/166B41J2/04556B41J2/0456B41J2/1707G01C3/00G01S17/08B41J2/04535H10K71/00H10K71/135
Inventor 顾辛艳
Owner NANJING TECH CORP LTD