PCB (Printed Circuit Board) base plate with hardening layer and preparation method and application of PCB base plate

Abstract

The invention provides a PCB base plate provided with a hardening layer. The PCB base plate comprises a base plate and hardening combination layers oppositely arranged on the two sides of the base plate. The hardening combination layer comprises a bonding layer arranged on the surface of the base plate, an aluminum foil arranged on the surface of the bonding layer and a hardening layer arranged on the surface of the aluminum foil; wherein the bonding layer is made of an adhesive or a lubricating coating; the hardening layer is prepared from the following components in parts by weight: 60-85 parts of epoxy resin, 0.03-2 parts of a defoaming agent, 0.03-1 part of a flatting agent, 2-5 parts of a dispersing agent, 7-10 parts of modified polyamine and 10-15 parts of superfine powder calcium carbonate or aluminum oxide. The PCB base plate is stable in structure and not prone to deformation and warping, when the PCB base plate is applied to drilling of a PCB, burrs can be avoided, the drilling quality of the PCB is improved, in addition, when a drill bit drills to the surface of the PCB base plate, heat can be effectively absorbed, and abrasion of the drill bit can be reduced.

Description

technical field [0001] The present application relates to the technical field of PCB board drilling, in particular to a PCB backing plate provided with a hardened layer and a preparation method and application thereof. Background technique [0002] PCB (Printed Circuit Board, printed circuit board) drilling pad (referred to as pad) is an auxiliary material that is placed under the PCB to be processed to meet the requirements of the processing technology when the PCB is mechanically drilled. Due to the need for a large number of backing plates in the production of PCB mechanical drilling, and with the rapid development of PCB drilling technology in recent years, the backing plate industry has become an important part of the PCB raw and auxiliary materials industry. [0003] As an auxiliary material for PCB drilling processing, the backing plate has the following main functions: 1. It can protect the drilling machine table for drilling through the PCB board; 2. Reduce the temp...

AI Technical Summary

Problems solved by technology

At present, the lubricating pad used for drilling high-end 5G circuit boards on the market is equipped with a release paper to protect the lubricating material on the surface, so its surface hardness is only 65±5 (Shore hardness), and there are defects in hardness. When the PCB is drilled, the bottom plate has a large edge, and it needs to be polished by a manual machine before the next process can be carried out. If the polishing is not good, it is easy to cause no copper in the hole or plugged holes in the hole, resulting in quality hazards and product scrapping. Increased production costs; and the phenolic backing plate has the problem of warping and easy deformation, and because its surface hardness is too high, it wears a lot on the cutter face of the drill bit, so that the service life of the drill bit is correspondingly reduced

Images