Regarding the point of "via hole cover oil" and "via hole window" (the usage distinction of VIA and PAD), many customers and design engineers often ask what this means when placing an order for the system, and which one should I choose for my file Option? The explanation on this point is as follows:

   I often encounter such problems, the design is seriously non-standard, and I can’t tell which is the pad, which is the usage of via, sometimes the conductive hole is handled with the attribute of pad, and sometimes the keyhole is handled with the attribute of via, VIA The design of attributes and PAD attributes is confusing, resulting in wrong processing, which is also one of the problems that often cause complaints. For circuit board production factories, when processing CAM data, some processing film engineers will make mistakes because of the non-standard design files of customers. Help customers to modify documents, correct irregular designs, and process engineering data based on their own experience, which leads to and encourages customers' irregular designs. It does not mean that your file is correct! All engineers must pay attention to design standards and specifications! Jeddobang will once again strictly require all processing film engineers to keep the status quo of customer files as much as possible! Do as much as possible according to design specifications Deal with the standard, not according to the so-called experience! Reflect the problem, so that it can be a reference for the design engineers, improve the design quality and reduce the occurrence of problems!

  This article mainly explains the conductive holes, key holes, and the connection between protel /pads/ and geber files. Conductive holes: via key holes: several problems that pad is particularly prone to:

1. Mixing use of pad and via leads to problems

 1. When your file is pads or protel, send it to the factory and ask for via hole cover oil. Be careful, you have to carefully check whether your plug-in hole (pad) is also used for via, otherwise your There will also be green oil on the plug-in hole, which will lead to the inability to solder. Controversy: the plug-in hole must be sprayed with tin, how do you cover the oil, how do I use it, please check the file when you say this, use Is it pad design or via design!

 2. When your file is pads or protel, send the file to the factory, and the order requires via hole cover oil. Many customers use pad (plug-in hole) to represent the conductive hole, which will cause your conductive hole to open a window. Maybe what you want is via hole cover oil. At that time, the point of contention may be that what I want is conductive hole cover oil. Why did you open the window? Then please check your file design! If you are via, press Via processing, if it is a pad, it should be treated as a 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 identification, please be clear!

 2. During the conversion process of via, problems may arise due to non-standard design or you are not clear about the conversion gerber setting rules. When you send a gerber file, the factory cannot distinguish which are via holes and which are key holes. , the only thing that can be recognized is to process according to the file. If there is a soldering layer, there will be a window! The point of dispute: I want the via hole cover oil, you open the window for me now, I may cause a short circuit, then please check Take a look at your file, the gerber you produced is a film file, the factory has no way to check whether yours is a conductive hole or a key hole, please check the gerber file, whether there is a soldering layer, if there is, open the window, if not just cover oil

3. How to design via hole cap oil on protel or pads! - This is the most standard practice. If the design is standard, there will be no mistakes!

  There is a tenting option in the via attribute in protel. If you tick it, it must be covered with oil. Then you will transfer all the covered oil. In pads, the pads transfer file is to use the method of via (via) to cover the oil. : When outputting the soldermask, that is, the solder mask layer, just check the upper solder mask top——the via below, which means opening windows for all vias, and if you don’t check it, the vias are covered. , via you have two options, 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!