A kind of use method and preparation method of drill bit

Abstract

The invention discloses a use method and a preparation method of a drill bit, and relates to the technical field of machining tools. Wherein the drill bit includes a drill shank, a drill edge and a drill tip connected in sequence, the drill tip can conduct electricity and the drill edge is covered with a non-conductive film layer, the method for using the drill bit includes the following steps: S11, drilling through holes on the plate to be processed by the drill bit , and collect the feedback time T of each conductive layer of the plate to be processed through the drill tip; S12, determine the target layer and the reference layer of the plate to be processed, and calculate the time difference t between the target layer and the reference layer; S13, according to the time difference t and the drill bit Drilling speed v determines the distance H between the target layer and the reference layer; S14, using the distance H as the drilling depth to perform controlled depth drilling from the reference layer on the basis of through holes. Through the above method, when using the drill bit to control the depth of drilling, the drilling depth can be accurately controlled, and at the same time, there is no dependence on the process, and the processing efficiency and processing accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of machining tools, in particular to a method for using and preparing a drill. Background technique [0002] Plated Through Hole (PTH) in the multilayer printed circuit board (PCB) plays the function of interconnecting the inner power layer and the ground layer. When the system enters high-speed signal transmission, the PTH hole will become The bottleneck and obstacle of signal integrity, like a redundant "tail" (Stubs) in the transmission line, plays the function of a notch filter. In the signal transmission line, when such stubs appear in two places, a period of oscillation will be formed Segments, whether filtering or oscillation, will cause damage to high-speed signal transmission and distort the signal. The most widely used method at present is the back-drilling method. However, on the one hand, the back-drilling method is highly dependent on the process, and on the other hand, the depth of the back-dr...

AI Technical Summary

Problems solved by technology

[0002] The Plated Through Hole (PTH) in the multilayer printed circuit board (Printed Circuit Board, PCB) serves as the interconnection function between the inner power layer and the ground layer. When the system enters high-speed signal transmission, the PTH hole will become The bottleneck and obstacle of signal integrity is like an extra "tail" (Stubs) in the transmission line, which acts as a notch filter. In the signal transmission line, when such Stubs appear at two places, a period of oscillation will be formed. Whether it is filtering or oscillation, it will cause damage to high-speed signal transmission and distort the signal

At present, the widely used method is the back-drilling method, but on the one hand, the back-drilling method is highly dependent on the process, and on the other hand, the back-drilling depth is not easy to control

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