Regarding the point of "Via window opening" and "Via hole cover oil" (the usage distinction between PAD and VIA), many customers and design engineers often ask what this means when placing orders in the system. Which one should I choose for my file? Options

Here is an explanation of this problem as follows: I often encounter such problems, the design is seriously non-standard, and it is not clear that it is a pad, and that is the usage of via. Sometimes the conductive hole is processed by the attribute of the pad, and sometimes the key hole is inserted. Via attributes are used for processing. The design of VIA attributes and PAD attributes is confusing, leading to incorrect processing. This is also one of the frequent complaints. For circuit board production plants, when processing CAM data, some process engineers are due to customer design documents. If you are not standard, you will be wrong. We will help the customer to modify the file, make the non-standard design right, and deal with the engineering data based on our own experience, which leads to and contributes to the customer's design irregularity. PCB hereby explains: What you did last time does not mean that your file is correct! All engineers must pay attention to the design standards and specifications! Jiepei PCB will again strictly require all processing film engineers to keep as much as possible The current situation of customer files! Try to deal with the design specifications and standards as much as possible, not according to the so-called experience! Show the problem, so that you can be a reference for the design engineers, improve the design quality and reduce the occurrence of problems! This article mainly Explain the conductive hole, the key hole, and the conductive hole between the protel /pads/ and the geber file: via key hole:

Several problems that pad is particularly prone to appear:

1. During the via conversion process, the design is not standard or you are not clear about the conversion gerber setting rules, which leads to problems. When you send a gerber file, the factory cannot tell which are vias and those are keyholes. , The only thing that can be identified is to process according to the file. If there is a soldering layer, there will be a window! Dispute point: I want the via cap oil, you open the window for me now, I may cause a short circuit, please check Take a look at your file. The gerber you produced is a film file. The factory has no way to check whether your gerber file is a conductive hole or a keyhole. Please check the gerber file to see if it has a soldering layer. If yes, open the window, if not. Just cover the oil.

2. The mixed use of pad and via leads to problems. 1. When your file is pads or protel, send it to the factory and ask the via hole to cover the oil. Be careful, you must carefully check your plug-in hole (pad ) Is the via also used? Otherwise, your plug-in hole will be coated with green oil, which will cause you to not be able to solder. Dispute point: The plug-in hole must be sprayed with tin on it. How do you cover the oil? How do I use it, When you say this, please check the file, whether you use pad design or via design! 3. When your file is protel or pads, send the file to the factory. The order requirement is via hole cover oil. There are many customers. Use pad (plug-in hole) to represent conductive holes, which will cause your conductive holes to open windows. Maybe you want via hole cover oil. At that time, the point of dispute may be that what I want is conductive hole cover oil. Why did you open it? The window is up, then please check your file design! JiePei has this point,

To explain again as follows, if you are via, press via, if it is pad, press pad! Because no one will know that you are a conductive hole, that is a plug-in hole, and via and pad are the only identifiers, please be clear! 4. How to design via cap oil in protel or pads! This is the most standard way. If the design is standard, there will be no error! There is a tenting option in the via attribute in protel, if you check it , Then it must be oil-capped, so all you transfer out are oil-capped. In pads, the file transfer of pads is to cover oil through holes (via) method: when outputting the soldermask, that is, the solder mask, just check it. solder mask top ——The via below represents all vias and open windows. If you don’t check it, the vias are covered with oil

To sum up: press the pad to do the pad, this is the plug-in hole, via you have two choices, if you provide the original file, you can choose when you place the order, if you provide the gerber file, please check whether the gerber file meets your requirements!