Multi-layer cover plate for drilling

Abstract

The invention provides a multi-layer cover plate for drilling. The multi-layer cover plate comprises an aluminum bottom layer, an aluminum middle layer, a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is arranged on the aluminum middle layer; the second adhesive layer is arranged between the aluminum bottom layer and the aluminum middle layer; the first adhesive layer is formed by mixing lubricating resin, combined resin and a compound with high thermal conductivity; the second adhesive layer is formed by mixing combined resin and a compound with high thermal conductivity.

Description

technical field [0001] The invention relates to a multi-layer drilling cover plate, especially a multi-layer cushioning and heat dissipation design, so as to achieve the purpose of guiding the drilling needle and heat conducting drilling needle, so as to reduce the deviation caused by the drilling needle drilling. To stabilize the drilling accuracy and accuracy and the problem of needle winding. Background technique [0002] In recent years, electronic products tend to be light and thin, multi-functional and high-speed development, resulting in a sharp increase in the number and density of micro-holes in printed circuit boards. Based on this trend, the effects of drilling quality, hole position accuracy and drill bit life are still Important indicators, however, traditional auxiliary plates such as traditional aluminum foil or phenolic resin cover plates are no longer suitable for the application of this requirement. If you use it reluctantly, it will easily break the needle...

AI Technical Summary

Problems solved by technology

[0004] However, although the above-mentioned structure can achieve the expected purpose, in actual implementation, because the lubricating layer on the uppermost layer of the metal cover plate will be melted by heat to lubricate the drill, so when the drill touches the lubricating layer, it cannot pass through the lubricating layer. The layer achieves a good effect of guiding the drilling needle to go down, so that once it touches the underlying aluminum substrate again, due to the high hardness of the aluminum substrate, it is easy to make the drilling needle slip and the hole shifts or the needle breaks

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