FPC (Flexible Printed Circuit) is a flexible circuit board that can be folded, bent, and wrapped according to different requirements, and is widely used in mobile phones, tablets, TVs, automobiles, and other fields. This article mainly introduces the materials and precautions required for FCC proofing production, hoping to provide help and reference for FPC proofing production.
1. FPC design drawings.
The first important information required for FPC proofing production is the FPC design drawing, which is the ultimate manifestation of FPC, including the position, size and connection method of signal flow, power cable, ground wire, pad and other components. Therefore, the FPC design drawings need to be clear, complete, detailed and accurate, which will help the process personnel understand the structure and function of the FPC product, and play a guiding and supporting role in the proofing production.
2. BOM table.
Another important information of FPC proofing production is the BOM table, which is a product bill of materials, listing all the materials, quantities, specifications and models that make up the product, as well as the corresponding quotient and merchant. Through the BOM table, the manufacturing process personnel will process and assemble different materials according to a certain proportion, sequence and process flow, so as to form FPC products, so the accuracy and completeness of the BOM table are related to the quality and cost of FPC proofing products.
3. PCB process documents.
In addition to FPC design drawings and BOM sheets, FPC proofing production also needs PCB process documents, that is, the process files of printed circuit boards, which include process wiring diagrams, solder mask drawings, drilling drawings, clear drawings, size marks and other information, describing the copper bar width, hole diameter, plane and line distance of the PCB, etc., which is helpful for PCB processing and subsequent assembly work.
Fourth, the production process and precautions.
In addition to the above information, FPC proofing production also needs to pay attention to the following production processes and precautions, first of all, the pressing conditions of the FPC pressure-sensitive film, the production should pay attention to the hot pressing conditions, pressing time, pressing temperature and auxiliary pressing film installation methods, etc., to ensure a good pressing effect. In addition, it is necessary to check whether the film copper is defective, mainly to check the thickness of the copper bar of the product, the quality of the copper foil, the oxidation and the connection of the copper hole of the film, so as to find and eliminate the problem in time. In addition, the corresponding stencil should be made according to the requirements of each color layer, and the aperture and wire diameter of the stencil should be strictly controlled to ensure the consistency of the printing effect. It is also necessary to ensure that the appropriate middle layer and conductive materials are selected according to the requirements of the BOM list, and the PCB board is well selected, and various details need to be paid attention to.
In FPC proofing production, the completeness and accuracy of the data have a non-negligible impact on product quality and R&D cycle, and it is necessary to fully collect, sort, manage and use these data, and pay full attention to the details of each link in the production process to ensure the quality and cost of FPC proofing products, in line with the needs of customers and the market.