Die head coating, coating device, and method of manufacturing die head for coating

A coating and die technology, which is applied to devices and coatings that apply liquid to the surface, can solve problems such as the inability to achieve the consistency of coating thickness, and achieve cost reduction, inhibition of thickness variation, and inhibition of local variation. Effect
CN1668389AInactive Publication Date: 2005-09-14DAI NIPPON PRINTING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAI NIPPON PRINTING CO LTD
Publication Date
2005-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

During displacement relative to a substrate 1, a coating die head emits coating liquid out of a slot 12a to a surface of the substrate. The coating die head includes a lip 12b having a lip surface 12b and a side having a side surface 12c. A contact angle of the surface 12c with respect to the coating liquid is greater than a contact angle of the surface 12b with respect to the coating liquid. This configuration enhances stabilization of bead of the coating liquid during application process of the coating liquid, preventing stripes and steps from appearing in the coating layer. This coating die head makes it possible to carry out high precision coating required for fabrication of color filters for liquid crystal displays.
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Description

technical field

[0001] The present invention relates to a coating die, a coating apparatus and a method of making a coating die. Background technique

[0002] Typically, the manufacture of color filters for liquid crystal displays involves coating a resist liquid on a substrate, including a glass flake, to provide three layers of red (R), green (G) and blue (B), or to provide protection. surface layer or geometry. For producing the required high precision coatings, spin coating has been used. In spin coating, excess expensive resist material is applied on the substrate surface, and the substrate is rotated at high speed. Spin coating has the problem that the radial velocity of the rotating substrate causes most of the resist material to scatter off the substrate surface, thereby wasting a large amount of applied resist material and causing high production costs.

[0003] This problem with spin coating requires an improved method of coating using coating dies such that spi...

Claims

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