Manufacturing method of Micro LED flexible circuit board

Abstract

The invention relates to a manufacturing method of a Micro LED flexible circuit board. The Micro LED flexible circuit board is a double-sided board and is provided with Micro LED bonding pads distributed in a matrix mode. The method comprises the following steps: preparing materials, cutting a double-sided copper-clad plate of a preset size, and a white glue layer being arranged between a copper layer and a base material of the double-sided copper-clad plate; baking the double-sided copper-clad plate; sequentially carrying out drilling, hole blackening, plasma cleaning and copper plating; manufacturing front and back circuits; aOI, controlling the gap of the wire to be within 10% of the wire width; wherein the Micro LED bonding pad surface needs to use a white covering film, the non-MicroLED bonding pad surface uses a yellow covering film, and the white covering film corresponding to the Micro LED bonding pad region needs to be windowed; conducting punching; carrying out solder mask gold melting treatment on the bonding pad, wherein the photosensitive ink is white; sequentially carrying out reinforcing, character silk-screen printing, flying probe testing, forming, packaging and warehousing. According to the invention, the exposure offset precision of the Micro LED bonding pad can be ensured, the light reflectivity and the binding force between the photosensitive ink and a circuit are improved, and the product quality is improved.

Description

Technical field [0001] The present invention relates to the field of flexible circuit boards, in particular to a method for manufacturing a Micro LED flexible circuit board. Background technique [0002] Flexible circuit board is a kind of highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the base material, referred to as soft board or FPC, with high wiring density and light weight , Features of thin thickness. Micro LED flexible circuit board is a brand new product. Generally, each Micro LED flexible circuit board can integrate thousands of Micro LEDs, which can be applied to various display screens. Generally, such a Micro LED flexible circuit board is a double-sided board with Micro LED pads distributed in a matrix on the front side. Using traditional manufacturing technology, the matrix pad circuit has large deviation tolerances, product deformation and shrinkage, and poor ink binding force, which will make the optical perfo...

AI Technical Summary

Problems solved by technology

Using the traditional manufacturing process, the deviation tolerance of the matrix pad line is large, the product deformation is large, and the ink bonding force is poor, which will make the optical performance of the product fail to meet the requirements, and the product reflection rate can only be controlled within 85%, and the reliability is poor. guaranteed quality

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