importance
Solder mask is the “clothing†of the printed board. The most intuitive quality for users to see the printed board is the solder mask. Therefore, the solder mask has always been critical. In addition, the silk screen solder mask and the characters are long. In the post-process of the manufacturing process, the imminently completed printed board, which is not low in value, has made mistakes in the subsequent process. The loss is too great and it is not worth it. In addition, the solder mask and character are one of the most scrapped processes. Therefore, it is very important to straighten out the process of screen printing and welding, and to straighten out the process of governance, document control and equipment maintenance. This is because: the density of double-sided and printed boards is increasing, and the high density of small hole SMT is an irreversible trend in the development of printed boards. The narrow solder ring with 0.12~0.20mm line width is the majority, and the thermosetting property of silk screen printing Green oil has been powerless, the appearance is not clean, the oil on the pad, skip printing, due to the silky staff of the maturity and emotional impact, so most of the current double-sided and multilayer board factory have eliminated the thermosetting epoxy green oil And switch to liquid photosensitive solder mask ink
Solder Mask: A protective layer that is applied to a printed circuit board that does not require soldering. Finally, outline the curtain coating. Since the 1990s, the use of traditional silk-screen thermosetting epoxy green oils has become less and less common in printed board factories. Purpose: To prevent bridging during soldering, provide a long-term electrical environment and chemical protection, and to form a beautiful "clothing" for printed boards, including thermosetting epoxy green oil (including UV uv green oil) and liquid photosensitive resister ink. II. Big system.
Component Characters: Provide yellow, white, or black markings to provide information for component mounting and future repairs to printed boards. Introduction
The screen printing process has the following three applications in double-sided and multi-layer printed boards. Usually green, also black, yellow, white, blue solder mask.
range
Describes the entire process of screen printing process, including: safe production, use of equipment, required materials, process flow and control parameters, manufacturing process (principle, working conditions, screen preparation, screen making, ink mixing, squeegee use, screen printing positioning Ways, board inspection, brush board, screen printing, pre-baking, exposure, development, curing), document and process review, inspection and testing projects. The content of this chapter is based on liquid photo-resistance solder masks and characters, and is applied to double-sided and multi-layer printed circuit boards.
Solder mask is the “clothing†of the printed board. The most intuitive quality for users to see the printed board is the solder mask. Therefore, the solder mask has always been critical. In addition, the silk screen solder mask and the characters are long. In the post-process of the manufacturing process, the imminently completed printed board, which is not low in value, has made mistakes in the subsequent process. The loss is too great and it is not worth it. In addition, the solder mask and character are one of the most scrapped processes. Therefore, it is very important to straighten out the process of screen printing and welding, and to straighten out the process of governance, document control and equipment maintenance. This is because: the density of double-sided and printed boards is increasing, and the high density of small hole SMT is an irreversible trend in the development of printed boards. The narrow solder ring with 0.12~0.20mm line width is the majority, and the thermosetting property of silk screen printing Green oil has been powerless, the appearance is not clean, the oil on the pad, skip printing, due to the silky staff of the maturity and emotional impact, so most of the current double-sided and multilayer board factory have eliminated the thermosetting epoxy green oil And switch to liquid photosensitive solder mask ink
Solder Mask: A protective layer that is applied to a printed circuit board that does not require soldering. Finally, outline the curtain coating. Since the 1990s, the use of traditional silk-screen thermosetting epoxy green oils has become less and less common in printed board factories. Purpose: To prevent bridging during soldering, provide a long-term electrical environment and chemical protection, and to form a beautiful "clothing" for printed boards, including thermosetting epoxy green oil (including UV uv green oil) and liquid photosensitive resister ink. II. Big system.
Component Characters: Provide yellow, white, or black markings to provide information for component mounting and future repairs to printed boards. Introduction
The screen printing process has the following three applications in double-sided and multi-layer printed boards. Usually green, also black, yellow, white, blue solder mask.
range
Describes the entire process of screen printing process, including: safe production, use of equipment, required materials, process flow and control parameters, manufacturing process (principle, working conditions, screen preparation, screen making, ink mixing, squeegee use, screen printing positioning Ways, board inspection, brush board, screen printing, pre-baking, exposure, development, curing), document and process review, inspection and testing projects. The content of this chapter is based on liquid photo-resistance solder masks and characters, and is applied to double-sided and multi-layer printed circuit boards.
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