Processing technology of PCB plug hole board

Abstract

The invention relates to a processing technology of a PCB plug hole board. The processing technology is used for manufacturing a PCB. During green-oil printing of the PCB, green oil is formed by mixing special plug hole oil and welding surface-resistant oil according to a mass ratio being 1:1, the special plug hole oil is high in content and does not have developing performance, the saturation ofink in a hole can be ensured by a plug hole, the welding surface-resistant oil is high in developing performance and low in resin content, rework can be ensured when the plug hole is unfavorable, theresin content of the ink of a new plug hole can be ensured when the special plug hole oil and the welding surface-resistant oil are matched to form the plug hole according to a proportion being 1:1, meanwhile, the oil developing performance of the new plug hole is also satisfied, the saturation condition of the plug hole is ensured, rework also can be performed when unfavorable condition occurs, and the scrap of a PCB cannot be caused.

Description

technical field [0001] The invention relates to a process for processing a PCB plug hole plate, which belongs to the field of PCB board manufacturing. Background technique [0002] With the development of mounting technology, it is required to open a window on one side of the PCB board for mounting parts, and oil is required in the hole to ensure that the tin beads will not penetrate from the hole to the other side when mounting the parts, and fall to the components to form Tin short circuit is bad. [0003] In the manufacturing process of PCB boards, there are two commonly used methods of plugging ink: the first is to use special plugging ink for plugging; the second is to use solder mask oil to plug and print. [0004] The advantage of the first type of ink plug hole is that the ink in the hole can be filled. The disadvantage is that when a defect is found, the PCB board cannot be reworked, because the plugging oil in the hole cannot be reworked, and the PCB will be scrap...

AI Technical Summary

Problems solved by technology

[0004] The advantage of the first type of ink plug hole is that the ink in the hole can be filled. The disadvantage is that when a defect is found, the PCB board cannot be reworked, because the plugging oil in the hole cannot be reworked, and the PCB will be scrapped.

[0005] The advantage of the second type of solder mask oil plugged tape printing is that it can be reworked if there is a defect, and the ink in the hole can be reworked clean, but the disadvantage is that there are many holes in the plug hole, the ink shrinks too much after drying, and the ink in the hole is not full enough.