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Method preventing printing ink from remaining on pad in hole of one-side windowed plughole panel of PCB

A PCB board and window opening technology, which is applied in the direction of processing steps, photolithography/patterning, electrical components, etc., can solve problems such as ink or ink solvent residue

Inactive Publication Date: 2017-05-10
惠州市大亚湾科翔科技电路板有限公司
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method for preventing the ink on the pad in the plug hole of the PCB with a window on one side, which can solve the problem of ink or ink solvent remaining on the pad of the orifice, thereby improving production. efficiency

Method used

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Embodiment Construction

[0010] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0011] A method for preventing ink on the pad in the hole of a plug hole board with a window on one side of the PCB, which is used to manufacture the PCB board, including: after the PCB board is printed with green oil, it is first exposed to the exposure process, and then the development process is performed. After the development process Increase the empty exposure process; in the exposure process, it is carried out by covering the photosensitive film on the surface of the PCB, and the photosensitive film is composed of the following raw materials by weight: polyvinylpyrrolidone 37.4, diethylene glycol dimethacrylate 2.7, Acrylamide 3.1, Dimethylaminoethyl Acrylate 1.8, Hypericin 1.5, Hematoporphyrin ...

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Abstract

The invention provides a method preventing printing ink from remaining on a pad in a hole of one-side windowed plughole panel of a PCB. The problem that the printing ink or a printing ink solvent remains on the pad in the aperture is solved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of PCB processing, and in particular relates to a method for preventing ink from abutting pads in the hole of a plug-hole plate with windows on one side of the PCB. 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 existing production process, for this kind of PCB board, after the green oil printing exposure and development, it enters the oven to dry the board. When drying, the ink solvent in the PCB board hole will all be opened from one side. One side volatilizes, and some ink or ink solvent will remain on the pad of the hole during the volatilization process, which will cause the parts to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/34
CPCH05K3/3405H05K2203/0505H05K2203/14
Inventor 张富治陈锦华付建云
Owner 惠州市大亚湾科翔科技电路板有限公司
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