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Deviation equalization counterpoint method of PCB (printed circuit board) exposure machine

A technology of exposure machine and deviation correction, which is applied in the direction of optics, photographic plate-making process of pattern surface, instruments, etc., can solve problems such as deviation correction and alignment deviation, and achieve the effect of increasing accuracy

Active Publication Date: 2013-07-24
浙江欧视电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a method for deviation correction and alignment of PCB exposure machines, which solves the problem of deviations in the correction and alignment of previous algorithms when multiple points are shifted in different directions.

Method used

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  • Deviation equalization counterpoint method of PCB (printed circuit board) exposure machine
  • Deviation equalization counterpoint method of PCB (printed circuit board) exposure machine
  • Deviation equalization counterpoint method of PCB (printed circuit board) exposure machine

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Embodiment 1

[0050] Embodiment 1, using the quadratic programming algorithm to obtain the offset tx of the x direction of the alignment target point is 1, the offset ty of the y direction is 1, and the offset angle After the rotation and offset of the upper and lower film, the four pairs of offsets of the upper and lower film are (-0.8, -0.8), (-0.2, 0.2), (0.4, 0.3), (0.5, -0.6) , and then the compensation value is (0.15, -0.1), through compensation, the final alignment target point coordinates are (-0.65, 0.7), (-0.05, 0.1), (0.4, 0.2), (0.65, -0.7), to achieve an equal share effect.

[0051] see Figure 5 , according to the figure, according to the target point 1, the point 3 using the least squares solution and the schematic diagram after the offset alignment of point 2 using the algorithm proposed by the present invention, we can know that the algorithm proposed by the present invention can be Effectively, when multiple points deviate in the opposite direction, the offset error can...

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Abstract

The invention provides a deviation equalization counterpoint method of a PCB (printed circuit board) exposure machine. The deviation equalization counterpoint method comprises the following steps of: measuring a central point coordinate, calculating an offset distance value d, establishing a data model, calculating the offset x1 in the x direction, the offset y1 in the y direction, and an offset angle of a counterpoint target point by sequential quadratic programming, and correcting a final coordinate by offset counterpoint according to the obtained offset, wherein p is a target point,. The deviation equalization counterpoint method provided by the invention can effectively improve the counterpoint precision of the PCB exposure machine.

Description

technical field [0001] The invention relates to the technical field of PCB plate making, in particular to a method for correcting deviation and equalizing alignment of a PCB exposure machine. Background technique [0002] The exposure machine is a kind of equipment used in the circuit board industry. It transfers the image information on the film sheet to the copper clad board coated with photosensitive substances (such as dry film) through ultraviolet light. According to the degree of automation of the machine, it is divided into manual alignment exposure machine and automatic alignment exposure machine. The manual alignment exposure machine manually aligns the film and the copper clad laminate, and then performs exposure, which has relatively high requirements for people, and the efficiency and accuracy are not high enough. The automatic alignment exposure machine is a device that obtains target information such as alignment holes through CCD imaging, and then calculates ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F9/00
Inventor 张方德王玉璋贺兴志钟靖
Owner 浙江欧视电科技有限公司