Fixture and method for measuring hole position accuracy of laser drilling machine

Abstract

The invention relates to a tool for measuring hole position accuracy of a laser drilling machine and a method. A positioning identity and multiple measurement icons are formed on the tool body; and asingle measurement icon comprises multiple reference identities arranged at intervals. According to the positioning identity on the tool body, a coordinate system is determined. Drilling coordinates are set on the laser drilling machine, and a hole is drilled in the tool body to form a laser hole. A circle center distance between a circle center of the reference identity and a circle center of thelaser hole is measured. The size of the reference identity is larger than that of the laser hole, and the laser hole can be prevented from covering the reference identity completely. Besides, the tool body is a transparent or semi-transparent plate sheet, the laser hole can transmit light, and thus, the pore size of the laser hole is easier to acquire. The coordinates of the circle centers of thereference identities and the coordinates of the holes are in one-to-one correspondence and the same, the reference identities can thus serve as reference points for the hole position accuracy of thelaser holes, and through measuring the circle center distance between the circle center of the reference identity and the circle center of the laser hole, the hole position accuracy value of the laserdrilling machine can be effectively judged.

Description

technical field [0001] The invention relates to the technical field of a hole position accuracy measurement structure and method, in particular to a jig and method for measuring the hole position accuracy of a laser drilling machine. Background technique [0002] With the rapid development of artificial intelligence, cloud computing, big data, graphic recognition and other technologies, under the development requirements of high density, high integration, multi-function and miniaturization, the size of PCB (Printed Circuit Board, printed circuit board) Get smaller and smaller. HDI (High Density Interconnector, High Density Interconnect) manufacturing has become an important development trend in the PCB industry. During the processing of HDI, the PCB needs to be drilled with a laser drill. As the pitch of HDI continues to shrink, the hole position accuracy of the laser drill directly affects the accuracy of the holes on the PCB. [0003] In the traditional method, the PCB ...

AI Technical Summary

Problems solved by technology

[0003] In the traditional method, the PCB is usually used as a fixture to measure the hole position accuracy of the laser drilling machine. Since the laser holes made by the laser drilling machine are mostly blind holes, it is difficult to obtain the size of the laser hole on the PCB. At the same time, due to the structural problems of the PCB itself, the PCB The hole pattern of the laser hole on the laser drilling machine is unstable, which leads to inaccurate measurement results of the hole position accuracy of the laser drilling machine

Images