A single-sided non-flowing PP lamination structure and method for aerospace circuit boards

Abstract

The invention relates to a single-sided stagnant PP laminating structure of a circuit board for an aerospace purpose. The single-sided stagnant PP laminating structure sequentially comprises a steel plate, copper foil, a PE film, a base plate, a core plate, stagnant PP, a release film, the PE film, the copper foil and the steel plate from top to bottom, wherein the size o the PE film at the upper part is equal to or slightly smaller than that of the core plate and the base plate is a copper-clad plate. According to the single-sided stagnant PP laminating structure, after the PE films and the base plate are added, the structures of upper and lower layers are approximately symmetrical, the PE film at the upper part can offset stress generated by the PE film at the lower part, and the base plate can offset the stress generated by the stagnant PP, so that the defect that the plate warping rate of a single-sided laminated stagnant PP product is over-high is avoided, the plate warping rates of different products are smaller than 0.5% and are much smaller than 0.75% requested by the process through random sampling inspection after mass production, the qualified rate of various batches of products is greatly improved, the production efficiency is improved and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of improving the manufacturing process of circuit boards for aerospace, in particular to a single-sided non-flowing PP lamination structure and method for circuit boards for aerospace. Background technique [0002] Circuit boards are also called circuit boards, PCB boards, etc. One side of the circuit board is equipped with parts, and the other side is equipped with wires. Through the combination of various components, the stable operation of each device is guaranteed. It is used in all walks of life today. Circuit boards need to be used. For example, in aerospace equipment, the electrical performance requirements of the circuit boards used are higher. At present, customers often need single-sided lamination and non-flowing PP products. The structure used for lamination is: by From bottom to top, they are steel plate, copper foil, PE film, release film, non-flowing PP, core plate, copper foil and steel plate...

AI Technical Summary

Problems solved by technology

[0002] Circuit boards are also called circuit boards, PCB boards, etc. One side of the circuit board is equipped with parts, and the other side is equipped with wires. Through the combination of various components, the stable operation of each device is guaranteed. It is used in all walks of life today. Circuit boards need to be used. For example, in aerospace equipment, the electrical performance requirements of the circuit boards used are higher. At present, customers often need single-sided lamination and non-flowing PP products. The structure used for lamination is: by From bottom to top, they are steel plate, copper foil, PE film, release film, non-flowing PP, core plate, copper foil and steel plate. The copper foil is laminated on the core board on one side. Due to the asymmetrical laminate structure and the poor fluidity of the non-flowing PP, there will be uneven stress distribution after lamination (both non-flowing PP and PE films will generate stress). This will lead to different warpages in the final product. According to the process requirements, the warping rate should be less than 0.75%. It leads to waste of products in batches, resulting in low production efficiency and greatly increasing production costs.

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