Circuit forming method of outer layer of circuit board

A technology for outer layer circuits and circuit boards, which is applied in chemical/electrolytic methods to remove conductive materials, inks, household appliances, etc. It can solve problems such as production costs that cannot be reduced, material waste, and dry films that cannot be broken through. Strong sealing ability, good scratch resistance and high hardness
CN105338752AActive Publication Date: 2016-02-17深圳市乐建感光材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市乐建感光材料科技有限公司
Publication Date
2016-02-17

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Abstract

The invention relates to a circuit forming method of an outer layer of a circuit board. The method comprises: a circuit board with an outer layer circuit needing to be processed is provided; pouring and coating of deep-curing UV ink are carried out on a hole needing protection and / or a predetermined region needing protection at a circuit board surface on the circuit board; exposure is carried out on the condition of 100-300mJ / cm<2>; and development, etching, and membrane removing are carried out on the exposed circuit board to form an outer layer circuit of the circuit board. According to the invention, the deep-curing UV ink is used for manufacturing the circuit board and the inside of the hole and the region with the surface needing protection are coated with the ink; and deep curing can be realized after UV light source irradiation. Therefore, chemical impacts on a weak base developing solution with the pH being approximately equal to 10 and an acid etching solution with the pH being 2 to 3 and thus the anti-etching effect is realized.
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Description

technical field

[0001] The invention relates to a method for forming the outer circuit of a circuit board. Specifically, the invention relates to a method for using deep-cured UV ink instead of a dry film as a temporary protective film layer in the forming process of the outer circuit of a circuit board. Background technique

[0002] Circuit boards are regarded as an indispensable and important part in the rapidly developing electronics industry. The continuous improvement of circuits is to make continuous breakthroughs in the function and volume of electronic products. With the popularization of electronic products such as mobile phones and the ever-increasing functional requirements, the precision and complexity of circuit boards are also increasing day by day. All types of electronic products require circuit boards of varying complexity.

[0003] In the prior art, two processes are usually used to manufacture the outer layer circuit of the circuit board. The first proce...

Claims

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