A kind of drilling method of polymer thermistor printed circuit board

Abstract

The invention provides a drilling method for a polymer thermistor printed circuit board. The drilling method includes the steps that a polymer thermistor printed circuit substrate is manufactured; and drilling is conducted on the polymer thermistor printed circuit substrate in a lamination drilling manner. According to the drilling method, drilling is conducted on the manufactured polymer thermistor printed circuit substrate in the lamination drilling manner, the problem that burrs are generated on a board surface during drilling is solved through a phenolic resin plate and a cold punching plate which are clamped on the upper surface and the lower surface of the polymer thermistor printed circuit substrate correspondingly, and because the whole polymer thermistor printed circuit board substrate is located in the middle and the head portion of a drill bit is larger than the drill body portion of the drill bit, adhesive residues cannot appear in drilled holes.

Description

technical field [0001] The invention belongs to the technical field of PCB production, and in particular relates to a drilling method for a polymer thermistor printed circuit board. Background technique [0002] Polymer-based thermistor material is a kind of functional composite material made by filling conductive fillers (such as various metal powders, carbon black, carbon fibers, etc.) into the polymer matrix in a certain way and processing technology. The remarkable feature of this material is that the resistance changes nonlinearly with temperature. When the temperature rises or falls, the material can automatically adjust itself along the resistance temperature curve. Therefore, some people call it "temperature memory material". Products made of polymer-based thermistor materials have been widely used in electronics, communications, automobiles, rechargeable batteries, computers and their networks, industrial facilities, medical equipment, various large precision instru...

AI Technical Summary

Problems solved by technology

[0004] However, since the polymer-based thermistor material is mainly composed of titanium metal sintered at high temperature and polymerized with fillers, the PCB made of such materials mainly uses titanium metal with a content of 80%-90% and 10% -20% plastic is mixed and extruded, so this material has strong hardness and has the problem of unstable expansion and contraction

For PCB, in order to realize the conduction of the circuit, it must be drilled, but for the PCB made of polymer-based thermistor material, due to its strong hardness and instability of expansion and contraction, ordinary The conventional machining method of PCB drills the printed circuit board of the polymer thermistor, and there will be problems such as large ridges and residual glue in the holes.

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