PCB Tech - How should the PCB processing cost standard be calculated?

How should the PCB processing cost standard be calculated? The first is to look at the number of boards, mainly to distinguish between proofing boards and batch boards. The charging standards for these two types of boards are quite different. The proofing board is based on the delivery days. Generally, the delivery time for the model board is 2-5 days, so the price will be different for different days, plus the engineering fee. Then there are the board craftsmanship, line width and line spacing, number of holes, shape size, number of board layers and so on. The processing difficulty of the actual board is also required. The bulk board focuses on the production cost, board process, line width and line spacing, number of holes, shape size, number of board layers, materials, molds, etc. Different regions cause the price of PCB processing to be diversified. In terms of purpose and geographical location, the cost of PCB processing is decreasing from north to south. There are also certain differences in PCB processing prices in different regions. In addition to this reason, PCB processing manufacturers What is the standard for calculating the cost of proofing?

1. There are huge differences in the price of different grades of sheet materials. PCB sheets are divided into "rigid boards" and "flexible boards" according to their types. According to their grades, they can be divided into 94HB-94VO-22F-CEM-1-CEM- 3-FR-4 and other types, and each sheet is divided into different grades such as A/B/C/D. The higher the grade, the more expensive the price. Of course, the flame retardancy will be relatively improved.

2. Ink, the most common ink used in PCB processing is divided into three types: circuit, solder mask and characters. Circuit ink is used as a barrier layer to prevent corrosion of the circuit. When etching, it protects the circuit. Generally, it is a liquid photosensitive type. There are two kinds of acid corrosion resistance and alkali corrosion resistance. The alkali resistance is more expensive. After this layer of ink has corroded out the circuit, it must be dissolved with alkali. Solder mask ink is used to protect the circuit after the circuit is completed. There are liquid photosensitive ones, heat curing ones, and ultraviolet hardening ones. The pads are reserved on the board to facilitate soldering of the components and play the role of insulation and oxidation prevention. The character ink is used to mark the surface of the board, such as those marked with component symbols, which are generally white.

3. Process, common PCB manufacturing processes include tin spraying, OSP, immersion gold, gold plating and gold fingers, etc. The later the board is made, the higher the price. The surface treatment process of PCB processing is to effectively prevent the oxidation of the circuit board. Special treatment.

The cost calculation of the printed circuit board industry is the most special and complex of all industries. From cutting, lamination, forming, to FQC, packaging, and finished storage, it needs to be based on the material costs, labor costs, and labor costs of each process. The manufacturing expenses are calculated step by step, and then the cost is accumulated in batches according to the order product number. Every PCB sold in the printed circuit board industry is customized by customers, so the price of PCB processing needs to be costed first, and at the same time, it needs to refer to the automatic layout calculation of PCB computer, and the material utilization rate of layout on standard size copper clad laminates Make a comprehensive quotation. The cost of PCB processing is calculated based on the above parameter information. Under normal circumstances, the unit price of PCB proofing = unit area price * length * width (including board edges) If it is a puzzle, it should be calculated based on the total area, and then divided In terms of the number of boards, of course, some PCB manufacturers may still have costs for some projects, such as molds, film, and frame testing.