As for the point of “through hole cover oil” and “through hole window” (the usage of via and pad is distinguished), many customers and design engineers often ask what this means when ordering on the system. Which option should I choose for my document? The following points are explained:
There are often such problems. The design is not standard, so it is not clear that pad is the use of via. Sometimes the conductive holes are treated with pad attributes, sometimes the keyholes are treated with via attributes. The design of via attribute and pad attribute is disordered, which leads to wrong processing. This is also one of the problems that often complain. For circuit board production plants, when processing CAM data, Some processing filings engineers, because of the nonstandard design documents of customers, will be wrong, help customers modify documents, make the irregular design right, and handle engineering data with their own experience, which leads to and encourages the design of customers to be nonstandard. Jetland hereby states that: the last time you did the right, does not mean that your documents are right! All engineers are required to pay attention to design standards and specifications! Once again, Jetby will strictly require all the processing of filings engineers to keep the status of customer documents as far as possible! Try to do as much as possible according to design specifications and standards, can not be handled according to the so-called experience! Reflect the problem, so that can give you design engineers a reference, improve the design quality and reduce the occurrence of problems!
This paper mainly explains the conductive hole, the key hole, and the connection between Protel /pads/ and Geber files: via keyhole: several problems that are particularly easy to appear in pad:
1、 Pad and via mix, causing problems
1. when your document is pads or Protel, it is sent to the factory, and it requires that the oil is covered with holes. Please pay attention to it. You should carefully check whether your pad is also useful via. Otherwise, green oil will be added to your plug-in hole, which will lead to the inability to weld the dispute points: the plug-in hole must be coated with tin. How do you cover the oil? How can I use it, Please check the documents when you say this, and use pad design or via design!
2. when your document is pads or Protel, send the documents to the factory. The order requirement is the oil of the hole cover. Many customers use pad (plug-in hole) to represent the conductive holes, which leads to the opening of the window of your conductive hole. Maybe what you want is the oil of the hole cover. Then, the argument may be that I want the conductive hole cover oil. Why open the window, Then please check your file design!
For this, jetdo States again as follows: if you are via, you will treat via, and pad if it is! Because no one will know that you are conductive hole, that is plug-in hole, and via and pad are the only signs, please make it clear!
2、 Via in the process of conversion, due to the design is not standard or you are not clear about the rules of Gerber setting, there is a problem. When you send Gerber file, the factory can not distinguish those through holes, which are key holes, the only thing that can be identified is to process according to the document, and there will be windows if there is welding layer! Dispute point: I want to cover oil, you have opened the window for me now, I may cause short circuit. Please check your documents. Gerber you are sending is the filings document. The factory can not check whether your conductive hole or key hole is inserted. Please check Gerber file, whether there is welding layer, or open the window if there is no one. If not, cover oil 3 How to design the oil of the hole cover in Protel or pads! ——This is the most standard practice, if the design standard, then there will be no error!
There is a holding option in via attribute in Protel. If checked, it must be covered oil. In pads, the way to cover oil is to think about the method of sealing oil in via: when outputting solidermask, i.e. welding barrier layer, check upper solider mask top – the following via, which means all the holes are opened, If you do not check, summarize the oil of the hole cover: pad is made according to pad, which is the plug-in hole. Via, you have two options. If the original file is provided, you can select it when placing an order. If Gerber file is provided, please check whether Gerber file meets your requirements!