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Solder-resisting photosensitive resin composition, printed wiring board and preparation technology of printed wiring board

A technology for printed circuit boards and photosensitive resins, which is applied in the photoengraving process of pattern surface, printed circuit, printed circuit manufacturing, etc. There are problems such as air bubbles and poor solder mask performance, achieving good exposure performance and thickness uniformity, shortening exposure time, and good mechanical properties.

Pending Publication Date: 2015-12-09
河北盈丰电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a solder resist photosensitive resin composition for preparing solder resist photosensitive dry films, so as to solve the problems of poor thermodynamic properties and poor mechanical properties of existing solder resist photosensitive dry films
[0006] The second object of the present invention is to provide a printed circuit board and its manufacturing process with a solder resist photosensitive dry film as a solder resist layer, so as to solve the problem that the dry film solder resist layer prepared by the existing printed circuit board manufacturing process is easy to leave. Problems with bubbles and poor solder mask performance

Method used

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  • Solder-resisting photosensitive resin composition, printed wiring board and preparation technology of printed wiring board
  • Solder-resisting photosensitive resin composition, printed wiring board and preparation technology of printed wiring board
  • Solder-resisting photosensitive resin composition, printed wiring board and preparation technology of printed wiring board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Making solder resist photosensitive film

[0035] Such as figure 1 As shown, the prepared solder resist photosensitive dry film is composed of a three-layer structure of PE film 1, solder resist photosensitive dry film 2 and PET film 3. The specific production process is as follows:

[0036] a. Weighing

[0037] Binder (polystyrene resin 10g, polystyrene butadiene resin 2g), epoxy resin (polyurethane modified epoxy resin 32g), monomer (pentaerythritol triacrylate 13g), photoinitiator (xylenone 13g), Additives (5g of benzotriazole, 5g of triethylene glycol diacetate, 9g of polypropylene, 7g of ethylene (equivalent to about 5.6L)), dyes (4g of malachite green).

[0038] b. Premix polystyrene, polystyrene butadiene resin, pentaerythritol triacrylate, xylenone, benzotriazole, triethylene glycol diacetate, and polypropylene, and then add them to polyurethane modified epoxy resin , to obtain the mixed material, then dissolve the ethylene into the mixed material while vi...

experiment example

[0056] The performance of the dry film solder mask of the circuit board prepared in Example 1 and Comparative Example 1 is detected and compared, and the results are shown in Table 2 below:

[0057]

[0058] From the data comparison of the test items in Table 2, it can be seen that the solder resist layer formed by the dry film of the present invention using ultraviolet light curing is superior to thermal curing in terms of film thickness uniformity, resolution, and hardness.

Embodiment 2

[0060] Compared with Example 1, the coating thickness in step c is 15 μm, and other conditions remain unchanged.

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Abstract

The invention discloses a solder-resisting photosensitive resin composition, a printed wiring board using a solder-resisting photosensitive dry film, prepared from the solder-resisting photosensitive resin composition, as a solder mask, and a preparation technology of the printed wiring board. The solder-resisting photosensitive resin composition comprises the following components: 11-13 wt% of a binder, 29-32 wt% of epoxy resin, 11-14 wt% of monomer, 12-14 wt% of a photoinitiator, 25-29 wt% of an additive and 3.5-4.5 wt% of dye. The solder-resisting photosensitive dry film prepared from the solder-resisting photosensitive resin composition disclosed by the invention has the following advantages: (1) the mechanical property is excellent: the dry film is thinner and higher in strength and has excellent heat shock resistance; (2) the curing speed is high: the photosensitive dry film requires short time of exposure, can particularly ensure the manufacturing accuracy of the printed wiring board, and is applicable to manufacture of high-density wired circuit boards; (3) the photosensitive dry film is attached to the printed wiring board through the function of pressure and temperature and adopts a specific manufacturing technology, and no bubble exists between the solder mask and the circuit board.

Description

technical field [0001] The invention relates to the production of printed circuit boards, in particular to a solder resist photosensitive resin composition, a printed circuit board with a dry film made of the composition as a solder resist layer and a manufacturing process thereof. Background technique [0002] There are usually three ways to make printed circuit board solder resist patterns. The screen plate directly prints the solder resist pattern, coats a photosensitive wet film to cure it to produce a solder resist pattern, or attaches a photosensitive dry film to develop and then cures to produce a solder resist pattern. Among them, the method of attaching a photosensitive dry film to develop a solder resist pattern is more suitable for circuit boards with high-density wiring, and can be accurately aligned with the wiring lines on the circuit board. Moreover, the dry film is not easy to contaminate the pad and affect the reliability of soldering. [0003] Although the...

Claims

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Application Information

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IPC IPC(8): G03F7/004G03F7/027H05K1/02H05K3/00
Inventor 张伯平
Owner 河北盈丰电子科技有限公司
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