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1. PCBA processing quotation cycle
Under normal circumstances, we say how long it will take for the PCB processing quotation to start from which links are included in the PCB manufacturing. Everyone may know that PCBA is a general term for PCB welding in China. It includes three parts (PCB circuit board, SMT patch, component welding), then PCBA quotation must be determined by these three parts. So today, the editor of Jiangsu Meizheng will break it down with you. I hope I can explain to you a simple understanding of how long the quotation cycle is.
1. PCB board: PCB quotation and board-making documentation required for PCB quotation. If the information is complete, sort out all the information, how much is the special process that needs to be charged separately, plus other miscellaneous fees, basically a complete set of prices can be quoted within 2 hours. If there are still a lot of quotations waiting ahead, it's a different matter.
PCBA processing
2. SMT chip processing section: This module is mainly an accounting of processing fees. The general PCBA factory counts money according to the number of points. Some are points for each item, and some are points for each foot. This is the biggest trick. Each item has at least 2 feet. If one piece is counted as one point, it may be a single point price. It will be higher than the price of one point per foot. After all, there are few points, and no one can buy and sell at a loss. So don’t look at a point that’s expensive and don’t evaluate it. The evaluation of this piece can actually be done within one hour.
3. Component module: components include conventional resistance-capacitance and special components. The current market for conventional components is transparent, and it is easier to evaluate the price, but some special BGA/IC will be more troublesome, such as the Huawei incident that has been raging in the past two years, and many special components will involve international embargoes and approvals. Strict procedures, long customs clearance time, and unstable prices. So the quotation cycle is generally 3 to 4 days.
Basically, after the above decomposition, we will find that PCBA's quotation takes several working days. Unless it is a company with its own stock materials that can evaluate it in a very short period of time, the others may be just a comparison of PCB and SMT patches. quick. In some cases, for example, there are many orders and the quotation list is very tight. It must be the one who reports first. After all, customers are treated equally.
Second, the method of PCB manufacturability design review
When the PCB design is completed, we all need to perform functional inspections on all items. Just like when we finish the examination papers ourselves, we need to do a simple analysis and check all the questions again to ensure that no major mistakes will be made due to negligence. Similarly, PCB design is the same. The following are the inspection items that need to be carried out after PCB design:
1. DFM review of the light board: Whether the light board production meets the process requirements of PCB manufacturing, including wire width, spacing, wiring, layout, vias, Mark, wave soldering component direction, etc.
2. Review the match between the actual components and the pads: whether the purchased actual SMT components and the designed pads are consistent (if inconsistencies are indicated with red marks), and whether they meet the minimum spacing requirements of the placement machine.
3. Generate three-dimensional three-dimensional graphics: generate three-dimensional three-dimensional graphics, check whether the space components interfere with each other, whether the component layout is reasonable, is conducive to heat dissipation, whether it is conducive to the heat absorption of SMT reflow welding, etc.
4. Optimization of PCBA production line: optimize placement sequence and material station location. Input the existing placement machine (such as Siemens high-speed machine, global multifunction machine) into the software, and allocate the components on the existing board, how many types Siemens pastes, which locations, how many types around the world, and which ones Location, where to pick up the material, etc. So as to optimize the SMT patch processing program and save time. For multi-line production, the placement of components can also be optimized.
5. Work instructions: automatically generate work instructions for workers on the production line.
6. Revision of inspection rules: The inspection rules can be modified. For example, the minimum component spacing is 0.1mm, which can be set to 0.2mm according to the specific model, manufacturer, and board complexity: the minimum wire width is 6mi, and it can be changed to 5mil for high-density design.
7. Support Panasonic, Fuji, Universal placement software: it can automatically generate placement software, saving programming time.
8. Automatically generate steel plate optimization graphics.
9. Automatically generate AOI and X-RAY programs.
10. Inspection report.
11. Support various software formats.
12. Review the BOM and correct the corresponding errors, such as spelling mistakes by the PCB manufacturer. And convert the BOM table into software format.
