Formation method for thin-layer border of sapphire window

Abstract

The invention provides a formation method for a thin-layer border of a sapphire window of a high-end mobile phone or camera. According to the formation method, a coated laser engraving process is replaced by a precise silk-screen printing process. The formation method comprises the following steps: cleaning up a sapphire window substrate (3) by virtue of an ultrasonic cleaning process before printing; fixing the sapphire window substrate (3) to be machined onto a substrate location fixture during the printing, locating a movable frame by virtue of a silk-screen printing screen plate, and preparing a silk-screen printing ink from a silicon-free ink stock solution with the same brand, a curing agent and a diluting agent; roasting the sapphire window substrate (3) in a roasting box after the printing. According to the formation method, various colours are quite convenient to change during machining for the border of the sapphire window, and can be changed only through adjusting the colour of the ink and changing the ratio of the curing agent to the diluting agent.

Description

technical field [0001] The invention relates to a method for forming a thin-layer frame of a sapphire window used for high-end mobile phones and cameras. Background technique [0002] At present, the LCD screens on smart phones and digital cameras are covered with LCD screen protection windows, which are the most important appearance surface of smart phones and cameras; this kind of window is essentially a transparent cover with a thickness of about 1 mm, except for the main area in the middle as the LCD screen. Outside the display area of ​​the screen, the peripheral area on the back needs to form a thin layer of frame. After the thin layer is formed, it is pasted and fixed on the mobile phone or camera by applying glue on the surface of the thin layer. The thin layer frame area is used as a trademark, model, etc. The display area of ​​the text or picture logo and the exposed part of the necessary installation parts. Usually the color of the thin layer frame is consistent ...

AI Technical Summary

Problems solved by technology

This process requires extremely high equipment (a laser etching machine with a high-precision CCD positioning system is used); and the lens cannot be repaired after etching; it takes a long time to etch a piece, and one machine can only complete about 50 pieces per day. low efficiency

Therefore, the existing method of forming a sapphire window frame using a coating laser engraving process has great limitations, especially the transformation of various colors during processing is very difficult

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