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Self-repairable photosensitive weld-retarding dry film

A solder mask dry film, self-healing technology, applied in photosensitive materials, optics, opto-mechanical equipment, etc. for opto-mechanical equipment, can solve the problems affecting the production yield of circuit boards, circuit short-circuits, etc., to ensure solder-resistance. and insulation, prolonging the service life

Active Publication Date: 2016-12-21
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary solder mask dry film may have defects caused by man-made or its own product quality problems. These defects are very likely to cause solder deposition on the circuit board during the later soldering process, resulting in a short circuit, which directly affects the circuit board. Production yield

Method used

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  • Self-repairable photosensitive weld-retarding dry film
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Embodiment 1-6

[0044] Hereinafter, the preparation method of the sample for evaluation of an Example and a comparative example, the evaluation method of a sample, and an evaluation result are demonstrated.

[0045] The production method is as follows:

[0046] First, the following alkali-soluble polymers are prepared.

[0047] Under a nitrogen atmosphere, add 120 milliliters of methyl ethyl ketone to a 500 milliliter four-necked flask equipped with a heating device, a stirring paddle, a serpentine condenser, a constant pressure dropping funnel and a thermometer, and add all the monomers used in the polymer formula. body, turn on the stirring device, and raise the temperature of the heating device to 80°C. Next, under a nitrogen atmosphere, a solution of 0.3 g of azobisisobutyronitrile in 30 ml of butanone was slowly added dropwise to the reaction flask, and the dropping process lasted for about 1.5 hours. After the dropwise addition was completed, the insulation was continued for 4 hours. ...

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Abstract

The invention discloses a self-repairable photosensitive weld-retarding dry film. According to the invention, dicyclopentadiene and ethylidene norbornene are coated in microcapsule with the diameter of 1-10 [mu]m formed by urea-formaldehyde resin, the microcapsule is mixed with a carboxyl-containing alkali soluble polymer, a vinyl-containing unsaturated monomer or oligomer, a photoinitiator, an auxiliary agent, dicyclopentadiene, ethylidene norbornene, and bis(tricyclohexylphosphine)benzylidine ruthenium dichloride, a support is coated by a mixture and then dried; the upper layer is applied with a polymer cover membrane, and then the self-repairable photosensitive weld-retarding dry film is prepared. After a self-repairable material is introduced into the weld-retarding dry film, the weld-retarding dry film can realize self repairing when the defects of crack and cavity are generated, anti-welding performance and insulating property of a circuit board are guaranteed, and the usage life of the circuit board is greatly prolonged.

Description

technical field [0001] The invention relates to a photosensitive solder resist dry film, in particular to a solder resist dry film with a self-repairing function that can greatly improve the solder resistance and insulation of a circuit board. Background technique [0002] With the rapid development of my country's electronics industry and science and technology, the requirements for the precision, reliability and stability of various electronic instruments, computers and military equipment are increasing. Requirements such as high precision are getting higher and higher, and the traditional screen printing process of solder resist printing materials can no longer meet the requirements of high-precision plate making. So photosensitive solder mask dry film came into being. It is characterized by accurate and reliable plate making, simple and convenient process, and short production cycle. In the case of many varieties, small batches and short delivery time, it shows its supe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/027G03F7/004
CPCG03F7/004G03F7/027
Inventor 黄森彪李志强李伟杰严晓慧韩传龙周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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