PCB-used mark point repairing method

Abstract

The invention discloses a PCB-used mark point repairing method. The method comprises the following steps: S1, an art paper sheet and a micro mounted film are laminated through a laminator to form a composite sheet; S2, according to the film for the needed mark point pattern, the laminated composite sheet is developed through a developing solution; S3, the developed composite sheet is etched by using an etching solution; S4, the etched composite sheet is subjected to film stripping through a film stripper, a copper point attached to the micro mounted film is formed, and the composite sheet is cleaned by using deionized water; S5, a plating solution is sprayed on the surface of the copper point, electroless nickel and gold is applied, the mark point is formed, the plating solution comprisesNi<2+>: 0.082 mol / L and Au: 0.3 to 1.0 g / L, and the composite sheet is cleaned by using deionized water; and S6, the mark point is picked off from the micro mounted film, an adhesive is used to bond the mark point to a to-be-repaired mark point. The mark point is adopted to repair the PCB under panel-size outgoing, the overall yield of the PCB can be enhanced, and particularly for a flexible circuit board which is easy to cockle and whose edge MARK is damaged usually, by adopting the method of the invention, the yield of the FPC can be increased by about 2%.

Description

technical field [0001] The invention relates to the field of circuit boards, in particular to a method for repairing mark points for PCBs. Background technique [0002] PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connections of electronic components. Because it is made using electronic printing, it is called a "printed" circuit board. [0003] For the convenience of SMT assembly, the PCB generally adopts the way of connecting boards for shipment. Four corners of the connecting board are placed for position identification mark points on the automatic placement machine, which is convenient for customers to print solder paste and for CCD positioning before the placement machine attaches components. In the PCB manufacturing process, it is inevitable that the mark points will be damaged and other defects. Once on...

AI Technical Summary

Problems solved by technology

[0003] For the convenience of SMT assembly, the PCB generally adopts the way of connecting boards for shipment. Four corners of the connecting board are placed for position identification mark points on the automatic placement machine, which is convenient for customers to print solder paste and for CCD positioning before the placement machine attaches components. In the PCB manufacturing process, it is inevitable that the mark points will be damaged and other defects. Once one of the marks is damaged, the entire board will be scrapped.