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White solder mask composition for spraying

A technology of solder resist and composition, which is applied in the direction of coating non-metallic protective layer, photosensitive material used in optomechanical equipment, secondary treatment of printed circuit, etc., which can solve the problem of heavy environmental load, yellowing, and white solder resist composition Problems such as unsatisfactory complexes, to achieve the effects of improving production efficiency, inhibiting yellowing, and improving edge coverage

Inactive Publication Date: 2011-08-24
TAMURA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method described in Patent Document 3, the solvent content in the solder resist composition must be 35 to 40% by mass, and there is also a problem that the environmental load is large.
Furthermore, at present, hydrogenated castor oil, fatty acid amides, and polycarboxylates have been used in order to exhibit target viscosity characteristics and thixotropy, such as Anti-Terra-U manufactured by BYK CHEMIE JAPAN Co., Ltd., Anti-Terra-203, Anti-Terra-204, polycarboxamide solution, such as BYK-405 manufactured by BYK Chemical Japan Co., Ltd., modified urea, such as BYK-410 manufactured by BYK Chemical Japan Co., Ltd. , BYK-411, BYK-420, BYK-425 and other materials, but they all have the problem that they are prone to yellowing due to thermal process, and they are not ideal as a complex of white solder resist composition

Method used

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  • White solder mask composition for spraying
  • White solder mask composition for spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15、 comparative example 1～3

[0073] Mix the components shown in the following Table 1 according to the ratio shown in the following Table 1, use a three-roll mill, mix and disperse it at room temperature, and prepare the white paint for spraying used in Examples 1-15 and Comparative Examples 1-3. Solder resist composition. The compounded numbers in Table 1 below represent parts by mass.

[0074]

[0075] In addition, the detail of each component in Table 1 is as follows.

[0076] (A) Carboxyl-containing photosensitive resin

Synthetic example 1

[0077] Synthesis Example 1: Synthesis of Resin A-1

[0078] Add 110 parts by mass of acrylic acid (unsaturated group-containing monocarboxylic acid ), under the condition of heating to reflux, make it react according to the conventional method, in this reaction product, make 160 mass parts tetrahydrophthalic anhydride (multi-acid anhydride) react according to the conventional method, then, under heating to reflux, according to the conventional method 40 parts by mass of glycidyl methacrylate (ethylenically unsaturated monomer) was reacted to obtain a product (resin A-1).

Synthetic example 2

[0079] Synthesis Example 2: Synthesis of Resin A-2

[0080] Add 72 parts by mass of acrylic acid to a substance obtained by dissolving 210 parts by mass of cresol novolac epoxy resin (manufactured by DIC Corporation, N-680) as an epoxy resin in 120 parts by mass of diethylene glycol monoethyl ether acetate. Under the condition of heating reflux, it was made to react according to the conventional method, and among this reaction product, 76 mass parts of tetrahydrophthalic anhydrides (polybasic acid anhydride) were reacted according to the conventional method, and the product (resin A-2) was obtained.

[0081] - CYCLOMER P (ACA) Z-300: Daicel Chemical Co., Ltd. product, a carboxyl group-containing resin obtained using a resin having an acrylic copolymer structure.

[0082] · ZFR-1124: Nippon Kayaku Co., Ltd. carboxyl group-containing resin having a bisphenol F type acrylate epoxy ester structure.

[0083] · FLX-2089: Nippon Kayaku Co., Ltd. carboxyl group-containing resin havin...

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Abstract

The invention provides a white solder mask composition for spraying and a printed circuit board obtained via spraying of the white solder mask composition for spraying, the white solder mask composition for spraying is advantaged by reduction of environmental load, excellent edge covering, and capability of inhibiting edge collapsibility, orange peel wrinkling, and yellowing due to heat process. The white solder mask composition for spraying is characterized by comprising (A) a photoresist comprising carboxyl, (B) silica powder and / or metal oxide powder manufactured via thermal decomposition, (C) a photopolymerization initiator, (D) a diluent, (E) an epoxy compound, (F) a titanium oxide, and (G) a solvent.

Description

technical field [0001] The present invention relates to a white solder resist composition for spraying suitable as a solder resist or various resists that can be used as a permanent mask, and to a printed circuit board obtained by coating the composition. Background technique [0002] A printed circuit board is used to form a pattern of a conductive circuit on a substrate, and electronic components are mounted on the pads of the pattern by soldering, and the circuit portion excluding the pads is covered with a solder resist film as a permanent protective film. This prevents solder from adhering to unnecessary parts when soldering electronic components on a printed circuit board, and prevents circuit conductors from being directly exposed to air and corroding due to oxidation or humidity. [0003] In addition, printed circuit boards are also used as substrates for mounting light-emitting diode elements (LEDs), and the solder resist film formed on the mounting surface is requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/004H05K3/28
Inventor 西山弘恭
Owner TAMURA KK
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