Monitoring method for aligning degree of laser drilling

Abstract

The invention relates to a monitoring method for aligning degree of laser drilling. The monitoring method comprises the following steps of (1) according to the size of laser drilling Target Pad Ring, calculating the monitoring size of the aligning degree, wherein the calculation formula is monitoring of aligning degree=(Target Pad Ring-Target layer compensation) / 0.5; (2) testing method: after the monitoring value of the aligning degree of the laser drilling is calculated, arranging a testing needle under an electric measuring jig to the corresponding Pad; (3) judging method: if OPEN is tested out, the aligning degree is OK; if SHORT is tested out, the aligning degree is NG. The monitoring method has the advantage that the abnormal deviation of laser drilling is efficiently and accurately verified.

Description

technical field [0001] The invention relates to the field of PCB laser drilling manufacturing quality confirmation, in particular to a method for monitoring the alignment of laser drilling. Background technique [0002] With the development of the PCB industry, HDI (High Density Interconnect) has become a mainstream product in the PCB industry. Laser drilling has become an important feature of HDI products because of its small aperture and high density. Drilling deviation has become a key defect in laser drilling. In order to better control product quality and prevent defective products from flowing to customers, all manufacturers adopt AOI inspection stations (processes) after laser drilling. [0003] In the existing laser drilling process, many companies use magnifying glasses and AOI to detect abnormalities in laser drilling: [0004] 1. Magnifying glass detection: Random detection of personnel, low efficiency and high possibility of leakage; [0005] 2. AOI detection:...

AI Technical Summary

Problems solved by technology

[0004] 1. Magnifying glass detection: Random detection of personnel, low efficiency and high possibility of leakage;

[0005] 2. AOI detection: through optical reflection principle detection, due to the impact of machine parameter adjustment on the number of reporting points, the drilling deviation cannot be better detected

[0006] Both of the above two methods have disadvantages, and neither can efficiently and accurately select the laser drilling partial plate

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