Solder resist hole plugging method of printed circuit board
A technology for printed circuit boards and plug holes, which is applied in the fields of printed circuit, printed circuit, and printed circuit manufacturing. It can solve problems such as oil leakage from solder resist plug holes, affecting product quality, and increased difficulty in solder resist plug holes.
Active Publication Date: 2021-10-22
SHENZHEN KINWONG ELECTRONICS
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Problems solved by technology
[0003]With the continuous updating and upgrading of electronic products, the integration of printed circuit boards is also higher, with fine and dense lines in the board, small spacing between holes and pads, and product thickness-to-diameter ratio Large, such a design makes it more difficult to solder resist plug holes, often appear defects of oil leakage from solder resist plug holes, affecting product quality
Method used
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, that is, embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] It should be noted that when a component is referred to as being “fixed on” or “disposed on” another component, it may be directly or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. "Plurality" means two or more, unless otherwise clearly and specifically defined. ...
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The invention is applicable to the technical field of printed circuit boards, and provides a solder resist hole plugging method of a printed circuit board, which is used for plugging solder resist ink into a to-be-plugged hole on the printed circuit board, and the printed circuit board comprises a first board and a second board which are oppositely arranged. The solder resist hole plugging method of the printed circuit board comprises the following steps of: plugging solder resist ink into a to-be-plugged hole of the printed circuit board for the first time, wherein the depth of the ink entering is 50-70% of the depth of the to-be-plugged hole; pre-curing and exposing the solder resist ink in the to-be-plugged hole for the first time, so that the solder resist ink located in the middle of the to-be-plugged hole along the depth direction of the to-be-plugged hole is photo-cured; filling the solder resist ink into the to-be-plugged hole again; and carrying out pre-curing and second exposure on the solder resist ink plugged into the to-be-plugged hole. The solder resist hole plugging method of the printed circuit board overcomes the defect of oil leakage of the solder resist hole plugging, and improves the product quality.
Description
technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a solder resist plugging method for printed circuit boards. Background technique [0002] In the production process of printed circuit boards, it is usually necessary to uniformly print a layer of photosensitive ink on the board surface to protect the board surface from external environment erosion and achieve the purpose of solder resistance and insulation. Photosensitive inks usually have green, blue, White, red, yellow, black, the most common of which is green. In addition to printing oil on the board surface, plug holes are also required in the production process of printed circuit boards, that is, to fill the through holes in the board with solder resist ink. [0003] With the continuous updating and upgrading of electronic products, the integration of printed circuit boards is also higher, the lines in the board are fine, the spacing between holes and pads i...
Claims
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IPC IPC(8): H05K3/00H05K3/42
CPCH05K3/0094H05K3/423H05K3/425H05K2201/0959
Inventor 康国庆王园园张霞
Owner SHENZHEN KINWONG ELECTRONICS