How to distinguish PCB "via cover oil" and "via opening window"?
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 impossible to distinguish that it is the 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 processed by the attribute of the via, VIA The design of attributes and PAD attributes is confused, leading to incorrect processing. This is also one of the problems that often complains. For circuit board production plants, when processing CAM data, some processing film engineers will make mistakes because the customer’s design documents are not standardized. Help customers modify documents, correct irregular designs, and process engineering data based on their own experience, which has led to and contributed to the irregular designs of customers. Huaqiang PCB hereby clarifies: What you did last time does not mean that your file is correct! All engineers must pay attention to the design standards and specifications! Huaqiang PCB will again strictly require all film processing engineers to maintain 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 design engineers, improve the design quality and reduce the occurrence of problems!
This article mainly explains the conductive hole, the key hole, and the conductive hole between the protel /pads/ and the geber file: via key hole: several problems that are particularly prone to pad:
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 for via hole cover oil. Please be careful, you should carefully check whether your plug-in hole (pad) is also available via via, otherwise yours The plug-in hole will also be coated with green oil, which will make it impossible 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 and use Is it a pad design or a via design!
2. When your file is protel or pads, send the file to the factory. The order requirement is via hole cover oil. Many customers use pads (plug-in holes) to indicate conductive holes, which will cause your conductive holes to open. Maybe what you want is via hole cover oil. The point of dispute is that what I want is conductive hole cover oil. Why did you open the window? Then please check your file design!
Huaqiang PCB will explain this point again as follows. If you are via, press via, if it is pad, press pad! Because no one will know that your is a conductive hole, that is a plug-in hole, and via and pad are the only ones. Logo, please be clear!
Third, how to design via hole cover oil in protel or pads! This is the most standard way. If the design is standard, there will be no mistakes!
There is a tenting option in the via attribute in Protel. If you check it, it must be covered with oil. Then all you transfer out are covered with oil. In pads, when you transfer files to pads, you need to think about the method of covering oil through holes (via). : When outputting the soldermask that is the solder mask, just check the solder mask top-the via below represents all vias and open windows, if you don’t check it, the vias are covered. To sum up: pad press pad, this is the plug-in hole , Via, you have two options. If you provide the original file, let you choose when you place the order. If you provide the gerber file, please check whether the gerber file meets your requirements!
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