Fabrication method of printed circuit board

Abstract

The invention provides a fabrication method of a printed circuit board. By designing a partition line during the formation step, the circuit board can be still connected with a plate after cutting andformation, particularly for fabrication of a small-size circuit board, a positioning hole is not needed to be formed in each circuit board, the appearance damage of the circuit board is reduced, andthe production efficiency and the qualified size of the circuit board are improved; in the detection step, the quality of a via hole, such as hole position and hole plug state can be judged by comparing difference between reflection intensity, detected by an infrared emission sensor, of an infrared ray after passing through a standard hole and a to-be-measured hole; and the quality of each loop ofthe circuit board is detected one by one, and the short-circuit condition of each loop of a to-be-detected circuit board is judged by comparing difference between inductance values, detected by a probe, of each loop of a standard circuit board and each loop of a to-be-detected circuit. The fabrication method has the advantages of high production rate, high detection efficiency, high detection accuracy and high cleaning efficiency and is convenient to process.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a method for manufacturing a printed circuit board. Background technique [0002] With the development of circuit boards in the direction of small size, light weight, three-dimensional installation and high connection reliability, there are more and more small-sized circuit boards in the printed circuit board industry. Shape processing and finished product inspection are essential in the process of circuit board production. There are two least processes, among which, the shape processing is specifically to use the shape processing equipment (such as punching machine, edge milling machine) to process the imposition products into the single board form or delivery panel form required by the customer; the finished product inspection is specifically the finished circuit Before the board is shipped, use the naked eye or borrow tools (such as a magnifying glass, etc.) to ...

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Problems solved by technology

[0003] In the prior art, the shape of the small-sized circuit board is processed by milling machine technology. However, due to the small area of ​​the small-sized circuit board, it is difficult to design positioning holes in the board, which makes it difficult to fix the small-sized circuit board during the process of shape processing, resulting in Problems such as deviation and breakage of the circuit board shape; moreover, when the size of the circuit board is smaller than the dust collection device of the processing equipment, the circuit board is easily sucked and lost by the dust collection device during processing; in addition, for small-sized circuit boards During the inspection, due to the small size of the board, it is inconvenient for the inspector to take it, which reduces the inspection efficiency. Moreover, during the inspection process, the hand of the inspector easily blocks the inspection position of the board, resulting in the outflow of the problem board

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