Title:
CIRCUIT BOARD COMPRISING ULTRA-BLACK COMPOSITE COATING, DISPLAY DEVICE AND PREPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/216715
Kind Code:
A1
Abstract:
The present application provides a preparation method for a circuit board comprising an ultra-black composite coating. The preparation method comprises the following steps: providing a circuit board, the circuit board comprising a pad; forming a photosensitive resin layer on the circuit board; exposing the photosensitive resin layer; forming an ultra-black coating on the exposed photosensitive resin layer; forming a transparent photosensitive resin layer on the ultra-black coating; and exposing the transparent photosensitive resin layer, and developing the exposed transparent photosensitive resin layer and the exposed photosensitive resin to expose the pad to obtain the ultra-black composite coating. The ultra-black composite coating prepared in the present application has the characteristics of relatively high adhesion, relatively large insulation impedance and relatively consistent light reflectivity. The present application further provides an ultra-black composite coating prepared by the preparation method.
Inventors:
XIAO ANG (CN)
LIU LINGJUN (CN)
LIU JIE (CN)
LIU SHILIANG (CN)
LIU LINGJUN (CN)
LIU JIE (CN)
LIU SHILIANG (CN)
Application Number:
PCT/CN2023/081786
Publication Date:
November 16, 2023
Filing Date:
March 16, 2023
Export Citation:
Assignee:
UNILUMIN GROUP CO LTD (CN)
International Classes:
G02B5/00; H05K1/02; G09F9/30; H05K3/00
Foreign References:
| CN114133841A | 2022-03-04 | |||
| CN114867189A | 2022-08-05 | |||
| CN112011232A | 2020-12-01 | |||
| JP2015121753A | 2015-07-02 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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