A three-dimensional mask for printing

Abstract

The invention discloses a mask plate for printing, which comprises a substrate, a printing surface and a PCB (Printed Circuit Board) surface, wherein the printing surface and the PCB surface are positioned on both sides of the substrate. The mask plate is provided with a plurality of pattern openings and a three-dimensional structure; and the three-dimensional structure comprises a convex region on the printing surface and a concave region on the PCB surface. The mask plate is provided with three-dimensional convex and concave parts, and a convex height is 0.1 to 10 mm while a concave depth is 0.1 to 10 mm; the outer included angles between the convex and the concave parts and the plate surface are 80 degrees to 90 degrees; the mask plate comprises the following components: 40 percent to 55 percent of iron and 45 percent to 60 percent of nickel; and the mask plate has high accuracy, high uniformity and high plate surface quality, is bright and has no coarse points, scratches or pinholes; the openings have high quality, smooth opening walls, and no burrs; and the mask plate is low in production cost and has simple process and low energy consumption.

Description

technical field [0001] The invention relates to a three-dimensional mask, in particular to a three-dimensional mask for printing. Background technique [0002] With the rapid development of my country's electronics industry, stencil printing technology has also been applied in the electronics manufacturing industry, and SMT printing is a typical example. In the manufacturing process of electronic products, soldering electronic components and PCB needs to put tin on the PCB first, and there are hundreds of pads on the PCB that need to be tinned. The position of each pad corresponds to the electronic component. The best way to accurately tin the pads that need to be tinned at one time is to print. The usual method used in the electronics manufacturing industry is to make a piece of stainless steel sheet with numerous small holes, each hole corresponds to the pad that needs to be tinned, and then paste the stainless steel sheet on the stretched mesh, and the mesh is attached t...

AI Technical Summary

Problems solved by technology

However, the opening precision of the steel mold made by the traditional technology through laser cutting technology cannot meet the requirements, and the quality of the board surface is not high enough.

However, the electroformed nickel mask is easy to form pinholes and rough spots on the surface of the plate, and the solution is unstable, high cost, and high energy consumption.

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