Microwave Tech - Shenzhen PCB multi-layer circuit board urgent proofing factory

In double-layer circuit boards and multi-layer circuit boards, in order to connect the printed wires between the circuit boards of each layer, a common hole, that is, a via hole, is drilled at the junction of the wires that need to be connected in each layer. In the manufacturing process of PCB board manufacturing, the via hole must be plugged. The via plug oil process is one of the via processing methods. Let’s learn with Dingji Electronics what is the via plug oil made by PCB board?

Via plug oil refers to the production of plug holes with ink inside the holes of the through holes, and the quality and compactness of the plug holes are particularly emphasized. What is the inspection standard for the treatment of via plug oil? The first is to be opaque, and it must be covered and blocked by ink. The second is that the orifice should not show yellowing, and it should not be stained with tin.

The via plug oil process is a key supplement to via plug oil. Usually, high-quality PCB multi-layer circuit boards are required to be made into via plug oil, especially for vias like BGA, the requirements are relatively strict Harsh. The via plugging oil first fills the via hole with ink to block the via hole, so that the ink on the solder mask will not flow into the via hole, thus achieving the effect of avoiding yellowing of the via hole. The smaller the via hole of the circuit board, the easier it is to plug, and the via hole of the fortress oil is not easy to be too large.

In addition, for customers with stricter process requirements, if the oil is used for via hole cover oil, the cover oil is usually not full or yellowish, and it can be changed to via hole plug oil in the later period. Engineers should pay attention to the following points when docking the via plugging process with the PCB multilayer circuit board factory:

1. The attributes of the vias when placing an order must be consistent with the attributes of the file, so that the time for mutual confirmation with PCB multilayer circuit board manufacturers can be reduced.

2. If the document requires window opening, the corresponding solder mask must be clearly drawn

3. If the circuit board has a large number of pads that need to be soldered later, it is recommended to cover oil through holes, which can reduce the probability of short circuits
ipcb has a professional circuit board production team and domestic leading automated production equipment. PCB products include 1-32 layer boards, high TG boards, thick copper boards, rigid-flex boards, high-frequency boards, mixed dielectric laminates, blinds Buried hole boards, metal substrates and halogen-free boards.
Fast samples of high-precision circuit boards, 6-7 days for bulk orders for single and double panels, 9-12 days for 4-8 layers, 15-20 days for 10-16 layers, and 20 days for HDI boards. Double-sided proofing can be delivered in as fast as 8 hours.