CN219592704U

CN219592704U - Printed circuit board capable of preventing solder resist plug hole printing ink from cracking

Info

Publication number: CN219592704U
Application number: CN202321269630.XU
Authority: CN
Inventors: 刘敬平
Original assignee: Jiangxi Aisheng Precision Circuit Technology Co ltd
Current assignee: Jiangxi Aisheng Precision Circuit Technology Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-08-25
Anticipated expiration: 2033-05-24

Abstract

The utility model discloses a printed circuit board capable of preventing ink in a solder resist plug hole from cracking, and particularly relates to the field of PCB production, which comprises a PCB, wherein a via hole is formed in the PCB, copper is plated on the inner wall of the via hole, an ink layer I obtained by using 43T screen printing is coated on the outer side of the copper, an ink layer II obtained by using 77T screen printing is coated on the outer side of the ink layer I, and a screen with the model of 77T is used in second surface oil printing, so that the purpose of preventing the ink layer I from cracking can be achieved.

Description

Printed circuit board capable of preventing solder resist plug hole printing ink from cracking

Technical Field

The utility model relates to the field of PCB production, in particular to a printed circuit board capable of preventing solder resist plug hole ink from cracking.

Background

To prevent the PCB surface from oxidizing and to insulate, solder resist ink is typically printed on the surface to achieve the effect, and non-plug vias smaller than 0.5MM are typically produced by ink plugging. At present, the common ink hole plugging operation mode in the industry has the phenomenon of ink cracks in holes, and in the production flow and the use process after solder resist, liquid medicine can be hidden in the cracks and cannot be cleaned, but the test and inspection results cannot be affected, and the liquid medicine can attack in the holes and bite hole copper along with the extension of time, so that the hole breakage finally can be caused to cause abnormal functions.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a printed circuit board for preventing solder mask plug hole ink from cracking, which aims to solve the technical problems that: at present, the common ink hole plugging operation mode in the industry has the phenomenon of ink cracks in holes, and in the production flow and the use process after solder resist, liquid medicine can be hidden in the cracks and cannot be cleaned, but the test and inspection results cannot be affected, and the liquid medicine can attack in the holes and bite hole copper along with the extension of time, so that the hole breakage finally causes abnormal functions.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a prevent printing circuit board of solder mask consent printing ink fracture, includes the PCB board, set up the via hole on the PCB board, the plating has copper on the inner wall of via hole, and copper's outside coating has the printing ink layer one that uses 43T screen printing to obtain, the outside coating of printing ink layer one has the printing ink layer two that uses 77T screen printing to obtain.

The utility model has the technical effects and advantages that: through the first printing ink layer and the second printing ink layer, the probability of cracking of printing ink on the inner wall of the through hole can be reduced, and the quality of the PCB is improved.

Drawings

FIG. 1 is a schematic diagram of a printed circuit board for preventing cracking of solder mask plug ink according to the present utility model.

The reference numerals are:

1. a PCB board; 2. a via hole; 3. an ink layer I; 4. and a second ink layer.

Detailed Description

Examples

Referring to fig. 1, a printed circuit board capable of preventing solder mask plug hole ink from cracking comprises a PCB board 1, wherein a via hole 2 is formed in the PCB board 1, copper is plated on the inner wall of the via hole 2, an ink layer one 3 obtained by using 43T screen printing is coated on the outer side of the copper, and an ink layer two 4 obtained by using 77T screen printing is coated on the outer side of the ink layer one 3.

The common flow of ink plug holes is as follows: plating copper, pretreatment, aluminum sheet hole plugging, surface oil printing, pre-baking, exposure, development, inspection and post-baking, wherein after the process is finished, a layer of ink layer 3 is formed on the inner wall of the via hole 2, and the mesh type is 43T. Plating copper, pretreatment, aluminum sheet hole plugging, surface oil printing, pre-baking, exposure, development, inspection, post-baking, surface oil hole filling printing, pre-baking, exposure, development, inspection and post-baking, and printing by using a screen with a mesh model of 77T in the second surface oil printing, the purpose of preventing the ink layer I3 from being cracked and then filling is achieved.

Claims

1. The utility model provides a prevent to hinder printed wiring board of welding jack printing ink fracture, includes PCB board (1), its characterized in that: the PCB (1) is provided with a via hole (2), copper is plated on the inner wall of the via hole (2), the outer side of the copper is coated with a first ink layer (3) obtained by using 43T screen printing, and the outer side of the first ink layer (3) is coated with a second ink layer (4) obtained by using 77T screen printing.