A double-sided controlled coating method of photosensitive adhesive

Abstract

The invention discloses a double-sided controlled coating method of image photosensitive glue, comprising the following steps: 1) adding photosensitizer to the photosensitive glue, mixing it in latex, fully stirring and placing it for 1-2 hours, and controlling the viscosity to 3000-- 15000Pa·s; 2) Use butadiene and acrylonitrile to prepare nitrile rubber rubberized rollers by low-temperature emulsion polymerization; 3) Process the surface of the rubberized rollers: the groove spacing is 0.15mm, the depth is 0.20mm, and the shape is U-shaped groove; 4) Add talcum powder to nitrile rubber to make the rubber roller hardness reach 20-50 degrees; heat to 70°C and fully stir, then cool to room temperature to form; 5) Take two identical rubber rollers and set them up and down , the lower rubber roller is fixed on the frame, and the height of the upper rubber roller relative to the lower rubber roller is adjusted by a servo motor; the invention can realize double-sided simultaneous coating, reduces the number of drying times, saves energy consumption and processing time; Different materials and different thickness requirements are easy to adjust the coating, with high processing precision and high flexibility; long service life and low cost of consumable replacement.

Description

technical field [0001] The invention relates to the technical field of metal etching, in particular to a double-sided controlled coating method of image photosensitive glue. Background technique [0002] In today's production and life, the metal etching industry derived from the production method of integrated circuit boards is a very prosperous industry. The reason is that this processing method has many advantages. First of all, in terms of the type of metal, the traditional The circuit board processing corresponds to a single copper product, and the metal etching process meets the processing of various metals. Compared with laser, stamping and other processes, etching has the following advantages: it can process non-precision products, and the tolerance can be up to ±0.005 mm; can process very thin metal materials, the thickness of thin materials is 0.03mm; no stress occurs, and products processed by stamping and other machining methods often have large internal stresses,...

AI Technical Summary

Problems solved by technology

[0002] In today's production and life, the metal etching industry derived from the production method of integrated circuit boards is a very prosperous industry. The reason is that this processing method has many advantages. First of all, in terms of the type of metal, the traditional The circuit board processing corresponds to a single copper product, and the metal etching process meets the processing of various metals. Compared with laser, stamping and other processes, etching has the following advantages: it can process non-precision products, and the tolerance can be up to ±0.005 mm; can process very thin metal materials, the thickness of thin materials is 0.03mm; no stress occurs, and products processed by stamping and other machining methods often have large internal stresses, which cause deformation or other physical properties of processed products It can achieve precise machining; no mold opening preparation process is required, and the processing efficiency is high; no mold is required for verification experiments, and the cost is low; therefore, etching has been widely used in modern manufacturing industries; the specific process of etching production is: incoming inspection, Cleaning, painting, exposure, development, patching, etching, film removal, cleaning and drying, inspection, and packaging; among them, the coating is to apply the photosensitive material, commonly known as photosensitive adhesive, evenly on the surface of the metal, which is commonly used at present. There are two methods: one is to use screen printing, including selecting the screen, selecting the metal screen frame, performing pre-treatment to clean the screen and drying, spreading photosensitive glue, drying after one coating, and drying The finished metal material surface continues to repeat the coating process; this method can only be coated on one side at a time, and the second surface can be painted after drying, and the coating efficiency is low; both sides need to be dried, Large energy consumption; coating thickness is not easy to control; the service life of the screen is short, the defective rate is high, and the replacement cost is high; the accuracy of the mesh number is poor, and the material has poor solvent resistance; Coating; first process two iron rollers, plate them with hard chrome and make them into a rotating device; pull out the metal strip to be coated at a constant speed from the gap between the two rotating rollers, and during the pulling process, the photosensitive Apply glue to the upper surface of the metal strip, and then use the same method to prevent and control the other side of the metal strip at a distance of about 5 meters; this method has high requirements for the flatness of the material; it is only suitable for larger Mass production cannot meet small batch production, and the equipment cost is high; the service life of steel coating rollers is short, the replacement cost is high, and the product defect rate is high; in summary, it is necessary to improve and study the coating process in the prior art metal etching , to solve the above problem

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