KR20160139574A - A entry sheet - Google Patents
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- KR20160139574A KR20160139574A KR1020150074712A KR20150074712A KR20160139574A KR 20160139574 A KR20160139574 A KR 20160139574A KR 1020150074712 A KR1020150074712 A KR 1020150074712A KR 20150074712 A KR20150074712 A KR 20150074712A KR 20160139574 A KR20160139574 A KR 20160139574A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
- B23B35/005—Measures for preventing splittering
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0214—Back-up or entry material, e.g. for mechanical drilling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a printed circuit board for improving the perforability of a perforated drill in a perforating process for perforating a perforated hole in a printed circuit board during a manufacturing process of a printed circuit board and for preventing the resin layer from being curled during perforation, 0001] The present invention relates to an entry sheet for a substrate blank and a method of manufacturing the same,
A metal thin film; Dissolving a water-soluble acrylic polymer prepared by mixing and stirring water, isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, etc., with distilled water, polyethylene glycol, polyethylene oxide, polysiloxane, Mixing the mixture with the water-soluble acrylic polymer to prepare a lubricating resin; And a process of forming the lubricant resin on the metal foil film with a lubricant resin layer and drying the lubricant resin is carried out to manufacture an entry sheet for a printed wiring board blank according to the present invention and a method of manufacturing the same.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an entry sheet for a printed wiring board and a method of manufacturing the same, and more specifically, The present invention relates to an entry sheet for a printed circuit board blank, which prevents the resin layer from being curled during perforation and prevents breakage of the perforated drill, and a method of manufacturing the same.
BACKGROUND ART [0002] A printed circuit board (PCB) is an essential component that mounts electronic components to electrically connect electronic components to each other. The printed circuit board is used in many industrial fields including electrical products. In order to improve reliability and precision of a printed circuit board, The wiring width and the wiring distance of the circuit board are narrowed. Especially, the hole passing through the circuit board gradually becomes small in diameter, and the number of the holes is increased. Especially, the position of the hole is very precise It is required to have a high precision.
An entry sheet is disposed on the printed circuit board for high precision drilling on such a printed circuit board. The entry sheet should dissipate the heat generated by the drilling of the perforated drill, and must be capable of lubrication on the drill surface. In order to absorb the heat during drilling, it is necessary to reduce the frictional heat to ensure uniformity of the inner wall of the hole. It is an important factor that plays a role and function to prevent breakage or breakage damage of boring drill. Accordingly, as the number of the holes drilled on the printed circuit board is gradually increased and the diameter is gradually increased, the puncturing position of the perforated hole can be precisely adjusted without causing breakage or damage, In order to increase the precision of the perforation hole of the printed circuit board in the perforating operation of the perforated drill, it is required to improve the quality and function of the printed circuit board perforated entry sheet disposed on the printed circuit board, Lt; / RTI >
As one of the above conventional methods, Korean Patent No. 10-0889702, entitled " Perforated Sheet for Vibration Absorption ", has been proposed. According to this method, a drilling process Vinyl acetate, ethylene vinyl acetate, ethyl acrylate and ethyl methacrylate in a sheet for drilling processing including a metal layer and an organic resin layer imparting a vibration absorbing function so as to effectively absorb local vibrations due to high- The addition of a low melting point propylene resin that induces a phase separation phenomenon to a polymer or copolymer obtained from at least one monomer selected from acrylic acid and a compatibilizer that induces interfacial stability induces the rotational vibration of the drill to be absorbed at the fine phase separation interface, High-quality propylene-based resin However, in the above method, the metal layer and the organic resin layer must be laminated with a thermosetting adhesive in order to adhere the organic resin layer for vibration absorption to the metal layer, and the organic resin layer is not dissolved in water, And thus a problem of electric clogging (so-called short-circuiting) may occur.
As another example of the conventional method, Korean Patent No. 10-0672775, entitled " Entry sheet for PCB fabrication of a substrate and its manufacturing method " has been proposed. According to this method, A water-soluble polyester resin having a number average molecular weight of 10,000 to 80,000, a polyether ester first water-soluble lubricant having a molecular weight of 3,000 to 40,000 simultaneously having an ether group and an ester group having an acid at the terminal group and an ether group having a molecular weight of 600 to 1,000 However, since the surface of the lubricant resin is low in roughness and hardness, the above method has a problem that the accuracy of the hole is poor when drilling, and the accuracy of the inner wall of the hole is lowered due to the lower compatibility with the lubricant resin Respectively.
In order to solve the above problems, in order to solve the above-mentioned problems, in order to absorb the vibration of the drill during the drilling process of the printed circuit board and to prevent breakage and damage of the drill drill, A thin film and a water soluble acrylic polymer are prepared. A lubricating resin prepared by mixing and stirring the water soluble acrylic polymer with a mixture composed of polyethylene glycol, polyethylene oxide and polysiloxane is prepared and coated on the metal foil to form a lubricating resin layer A printed circuit board which absorbs the vibration of the drilling drill during the drilling process of the printed circuit board and closely adheres to the metal thin film and which does not leave the lubricous resin layer, Provided is a perforated entry sheet and a method of manufacturing the same And a purpose.
The above object of the present invention can be achieved by a thin film transistor comprising: a metal thin film; Dissolving a water-soluble acrylic polymer prepared by mixing and stirring water, isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, etc., with distilled water, polyethylene glycol, polyethylene oxide and polysiloxane to prepare a mixture, Mixing the water-soluble acrylic polymer with a lubricating resin; The lubricant resin is coated on the metal foil to form a lubricous resin layer, and the lubricant resin is dried to perform a drying process.
Preferably, the metal thin film is an aluminum thin film having a thickness of 0.05 to 0.5 mm.
Preferably, the water-soluble acrylic polymer comprises 50 to 66% by weight of isopropyl alcohol which maintains a temperature of 70 캜, 30 to 38% by weight of methyl acrylate, 2 to 10% by weight of acrylic acid, 0.65% by weight were mixed and stirred for 3 hours. Then, 1% by weight of isopropyl alcohol and 0.05% by weight of azobisisobutyronitrile were mixed again in 98.95% by weight of the first mixture, The mixture is stirred at room temperature to form a secondary mixture, and 90 to 95% by weight of the secondary mixture is added with 5 to 10% by weight of a 19% aqueous ammonia solution, and the mixture is stirred in the third order to prepare a water-soluble acrylic polymer.
Preferably, the lubricating resin is prepared by mixing 8 to 10% by weight of polyethylene oxide having a molecular weight of 100,000 to 300,000, 6 to 7% by weight of polyethylene glycol having a molecular weight of 20,000, polyethylene glycol having a molecular weight of 8,000 7 to 10% by weight of polyethylene glycol having a molecular weight of 6,000 and 5 to 9% by weight of polyethylene glycol were added and dissolved to prepare a mixture. Then, 1 weight% of polysiloxane was added to 89 to 96% by weight of the mixture thus prepared, And the mixture is cooled at room temperature to form a mixture. 3 to 10% by weight of the water-soluble acrylic polymer is added to 90 to 97% by weight of the mixture and stirred to prepare a lubricating resin.
Preferably, the lubricant resin layer formed on the metal foil layer has a thickness of 0.01 to 0.3 mm.
The above object of the present invention can also be achieved by a method for producing a water-soluble acrylic polymer, which comprises the steps of: 1) preparing a water-soluble acrylic polymer to be prepared by mixing (i) isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, And (ii) mixing and dissolving distilled water, polyethylene glycol, polyethylene oxide, polysiloxane or the like to prepare a mixture, and mixing and stirring the water-soluble acrylic polymer to the mixture; 2) a lubricating resin layer forming step of forming a lubricating resin layer by coating the lubricating resin on a metal foil; 3) a drying step in which a treatment process of drying the lubricating resin layer is performed; The present invention also provides a method of manufacturing an entry sheet for a printed circuit board.
Preferably, the step (i) of producing the water soluble acrylic polymer in the step (1) of producing the lubricant resin comprises the step of adding 30 to 38% by weight of methyl acrylate to 50 to 66% by weight of isopropyl alcohol maintaining the temperature of 70 캜, 2 to 10% by weight of azobisisobutyronitrile, 0.25 to 0.65% by weight of azobisisobutyronitrile, and mixing and stirring for 3 hours; and a second mixing step of mixing 98.95% by weight of the mixture subjected to the primary mixing step with isopropyl alcohol 1 And 0.05% by weight of azobisisobutyronitrile, mixing and stirring the mixture for 1 hour and cooling at room temperature to form a mixture, and a second mixing step of mixing 90 to 95% by weight of the mixture obtained by the second mixing step And a tertiary mixing step of adding 5 to 10% by weight of a 19% aqueous ammonia solution to the mixture to prepare a water-soluble acrylic polymer,
(Ii) mixing and stirring distilled water, polyethylene glycol, polyethylene oxide, polysiloxane or the like in the lubricant resin production step and mixing the water-soluble acrylic polymer with the mixture comprises: mixing 60 wt% 8 to 10 wt% of polyethylene oxide having a molecular weight of 100,000, 6 to 7 wt% of polyethylene glycol having a molecular weight of 20,000, 7 to 10 wt% of polyethylene glycol having a molecular weight of 8,000 and 5 to 9 wt% of polyethylene glycol having a molecular weight of 6,000 And then adding 1 wt% of polysiloxane to 89 to 96 wt% of the thus-prepared mixture, stirring the mixture for 1 hour to form a mixture and cooling the mixture at room temperature, and adding 90 to 97 wt% And 3 to 10% by weight of a water-soluble acrylic polymer.
According to the present invention, by forming the lubricant resin layer integrally formed without a separate adhesive layer on the metal foil, the vibration of the boring drill during the boring process of the printed circuit board is absorbed while the perforation is excellent and the resin layer is curled And the water soluble lubricious resin layer is closely attached to the metal thin film so that the lubricious resin layer is not left on the printed circuit board when drilled on the printed circuit board.
The present invention relates to a water-soluble acrylic polymer produced by mixing and stirring a metal thin film with isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, etc., and water-soluble acrylic polymer prepared by mixing distilled water, polyethylene glycol, polyethylene oxide, polysiloxane, Mixing and dissolving the mixture to form a mixture, mixing the mixture with the water-soluble acrylic polymer to prepare a lubricating resin; And a lubricating resin layer is formed on the metal foil film and the lubricating resin is dried, followed by drying.
The manufacturing method of the entry sheet for a printed circuit board blank includes a lubricating resin manufacturing step, a lubricating resin layer forming step of coating the lubricating resin on the metal foil film, and a drying step of drying the lubricating resin layer.
First, the step of producing a lubricating resin includes the steps of (i) preparing a water-soluble acrylic polymer to be prepared by mixing and stirring isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, etc., and (ii) Glycol, polyethylene oxide, polysiloxane or the like to prepare a mixture, and mixing and stirring the water-soluble acrylic polymer with the mixture.
The step (i) of producing the water-soluble acrylic polymer comprises adding 50 to 66% by weight of isopropyl alcohol maintaining a temperature of 70 캜 to 30 to 38% by weight of methyl acrylate, 2 to 10% by weight of acrylic acid, 0.25 to 0.65% by weight of nitrile, and mixing and stirring for 3 hours; and a second mixing step in which 98.95% by weight of the mixture in which the primary mixing step is performed is further mixed with 1% by weight of isopropyl alcohol, 0.05% by weight of azobisisobutyronitrile % By weight of a mixture containing 90% by weight of an aqueous ammonia solution and 5% by weight of an aqueous ammonia solution of 19% by weight, And a third mixing step of preparing a water-soluble acrylic polymer by stirring the mixture, wherein the total weight composition ratio is 30 to 38% by weight of methyl acrylate, 2 to 10% by weight of acrylic acid, Soluble acrylic polymer is prepared by adding and stirring 5 to 10% by weight of a 19% aqueous ammonia solution to 90 to 95% by weight of a mixed agitated product composed of 0.3 to 0.7% by weight of azobisisobutyronitrile.
The step (ii) of mixing distilled water, polyethylene glycol, polyethylene oxide, polysiloxane, and the like and mixing and stirring the water-soluble acrylic polymer with 60 wt% of distilled water maintaining a temperature of 60 캜, polyethylene oxide 8 6 to 7% by weight of a polyethylene glycol having a molecular weight of 20,000, 7 to 10% by weight of a polyethylene glycol having a molecular weight of 8,000, and 5 to 9% by weight of a polyethylene glycol having a molecular weight of 6,000, and then dissolving Adding 1% by weight of polysiloxane to 89% by weight to 96% by weight of the resulting mixture, stirring the mixture for 1 hour to form a mixture, cooling at room temperature, and adding the water-soluble acrylic polymer 3 to 10 By weight and stirring the mixture.
When steps (i) and (ii) are performed, the production of the lubricating resin according to the present invention is completed.
If the water-soluble acrylic polymer is less than 3% by weight, adhesion with the metal thin film of the aluminum material is deteriorated. If the water-soluble acrylic polymer is more than 10% by weight, Thereby causing interference.
If the molecular weight of the polyethylene glycol is less than 4,000, the surface of the metal thin film is cracked and the surface of the metal thin film is not clean due to the surface cracking of the metal thin film after the lubricant resin layer is coated on the metal thin film, do.
When the molecular weight of the polyethylene oxide exceeds 300,000, the resin layer curl of the bit occurs during the punching process, which causes the puncture accuracy to be lowered and causes bit breakage.
The polysiloxane imparts surface leveling and slipperiness to the metal thin film during the formation of the lubricant resin layer. When the weight% of the polysiloxane is more than 2% by weight, the surface of the metal thin film is tacky after the lubricant resin layer is formed, And the merchantability of the entry sheet is lowered.
Next, as a second step, a lubricating resin layer forming step in which the lubricating resin is coated on the metal foil to form a lubricating resin layer is performed. In order to form the lubricant resin layer, a known coater such as a comma coater or a rod coater is used. The thickness of the lubricating resin layer is preferably 0.01 to 0.3 mm.
As a final step, the step of drying the lubricating resin layer formed on the metal foil film is performed. In this step, a drying step is performed using a drying oven of a hot air circulating method at a temperature of 130 ° C.
The metal thin film to be disposed as a base layer for fabricating the entry sheet for a printed circuit board according to the present invention is preferably an aluminum thin film made of aluminum and has a thickness of 0.05 to 0.5 mm.
Hereinafter, the present invention will be described in detail with reference to examples and comparative examples, which should not be construed as limiting the scope of the present invention in any way to the understanding of the technical gist of the present invention.
(Example 1)
10 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 10 wt% of a polyethylene oxide having a molecular weight of 100,000, 10 wt% of a polysiloxane 1% by weight of a lubricating resin. The lubricating resin was formed on an aluminum foil using a coater. The coated aluminum thin film was placed in a drying oven of a hot air circulation type at a temperature of 130 캜 to perform a drying step to produce a printed circuit board blanking entry sheet having a thickness of the lubricant resin layer of 0.05 mm (50 탆).
(Example 2)
10 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 10 wt% of polyethylene oxide having a molecular weight of 100,000, 10 wt% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 3)
10 weight% of polyethylene glycol having a molecular weight of 8,000, 9 weight% of polyethylene glycol having a molecular weight of 20,000, 8 weight% of polyethylene oxide having a molecular weight of 200,000, 5 weight% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 4)
10 weight% polyethylene glycol having a molecular weight of 6,000, 6 weight% polyethylene glycol having a molecular weight of 20,000, 8 weight% polyethylene oxide having a molecular weight of 300,000, 5 weight% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 5)
10 weight% of polyethylene glycol having a molecular weight of 8,000, 7 weight% of polyethylene glycol having a molecular weight of 20,000, 8 weight% of polyethylene oxide having a molecular weight of 100,000, 5 weight% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 6)
10 weight% of polyethylene glycol having a molecular weight of 8,000, 7 weight% of polyethylene glycol having a molecular weight of 20,000, 8 weight% of a polyethylene oxide having a molecular weight of 100,000, and 5 weight% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 7)
10 weight% of polyethylene glycol having a molecular weight of 8,000, 7 weight% of polyethylene glycol having a molecular weight of 20,000, 8 weight% of polyethylene oxide having a molecular weight of 200,000, 5 weight% of a water-soluble acrylic polymer, 5 weight% of a polyethylene glycol having a molecular weight of 6,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 8)
10% by weight of polyethylene glycol having a molecular weight of 6,000, 6% by weight of polyethylene glycol having a molecular weight of 20,000, 8% by weight of polyethylene oxide having a molecular weight of 300,000, 5% by weight of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 9)
7 wt% of distilled water, 7 wt% of water soluble acrylic polymer, 9 wt% of polyethylene glycol having a molecular weight of 4,000, 8 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 8 wt% of polyethylene oxide having a molecular weight of 100,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 10)
7 wt% of distilled water, 7 wt% of water soluble acrylic polymer, 7 wt% of polyethylene glycol having a molecular weight of 6,000, 8 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 10 wt% of polyethylene oxide having a molecular weight of 100,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 11)
7 wt% of distilled water, 7 wt% of water soluble acrylic polymer, 7 wt% of polyethylene glycol having a molecular weight of 6,000, 10 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 8 wt% of polyethylene oxide having a molecular weight of 200,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 12)
10 weight% of polyethylene glycol having a molecular weight of 4,000, 8 weight% of polyethylene glycol having a molecular weight of 6,000, 6 weight% of polyethylene glycol having a molecular weight of 20,000, 8 weight% of polyethylene oxide having a molecular weight of 300,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 13)
8 weight percent of polyethylene glycol having a molecular weight of 8,000, 7 weight percent of polyethylene glycol having a molecular weight of 8,000, 6 weight percent of polyethylene glycol having a molecular weight of 20,000, 8 weight percent of polyethylene oxide having a molecular weight of 100,000, 10 weight percent of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 14)
5 wt% of polyethylene glycol having a molecular weight of 8,000, 8 wt% of polyethylene glycol having a molecular weight of 8,000, 6 wt% of polyethylene glycol having a molecular weight of 20,000, 10 wt% of polyethylene oxide having a molecular weight of 100,000, 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 15)
5 wt% of polyethylene glycol having a molecular weight of 8,000, 9 wt% of polyethylene glycol having a molecular weight of 8,000, 7 wt% of polyethylene glycol having a molecular weight of 20,000, 8 wt% of polyethylene oxide having a molecular weight of 200,000, a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Example 16)
6 wt% of polyethylene glycol having a molecular weight of 6,000, 6 wt% of polyethylene glycol having a molecular weight of 20,000, 8 wt% of a polyethylene oxide having a molecular weight of 300,000, 10 wt% of a water-soluble acrylic polymer, 10 wt% of a polysiloxane 1% by weight of a lubricating resin. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
In Examples 1 to 16, distilled water was fixed to 60% by weight, polysiloxane was fixed to 1% by weight, polyethylene glycol was varied in weight percentage within the range of 4,000 to 20,000 and polyethylene oxide And the weight% is varied within a range of molecular weight of 100,000 to 300,000 and mixed to prepare a lubricating resin.
The composition of the lubricant resin described in Examples 1 to 16 and composition ratios thereof are summarized in Table 1 below.
<Table 1>
In order to compare polyethylene glycol and polyethylene oxide which are out of the molecular weight range of polyethylene glycol and polyethylene oxide in the above embodiments with the composition of the lubricant resin, Comparative Examples 1 to 10 Respectively.
(Comparative Example 1)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 24% by weight of polyethylene glycol having a molecular weight of 1,000, 5% by weight of polyethylene oxide having a molecular weight of 500,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 2)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 24% by weight of polyethylene glycol having a molecular weight of 2,000, 5% by weight of polyethylene oxide having a molecular weight of 500,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 3)
A lubricating resin comprising 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 24% by weight of polyethylene glycol having a molecular weight of 1,000, 5% by weight of polyethylene oxide having a molecular weight of 1,000,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 4)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 24% by weight of polyethylene glycol having a molecular weight of 2,000, 5% by weight of polyethylene oxide having a molecular weight of 1,000,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 5)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 26% by weight of polyethylene glycol having a molecular weight of 1,000, 3% by weight of polyethylene oxide having a molecular weight of 2,000,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 6)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 26% by weight of polyethylene glycol having a molecular weight of 2,000, 3% by weight of polyethylene oxide having a molecular weight of 2,000,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 7)
A lubricating resin comprising 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 23% by weight of polyethylene glycol having a molecular weight of 1,000, 5% by weight of polyethylene oxide having a molecular weight of 500,000 and 2% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 8)
A lubricating resin consisting of 60% by weight of distilled water, 10% by weight of water-soluble acrylic polymer, 23% by weight of polyethylene glycol having a molecular weight of 2,000, 5% by weight of polyethylene oxide having a molecular weight of 500,000 and 2% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 9)
A lubricating resin consisting of 60% by weight of distilled water, 14% by weight of water-soluble acrylic polymer, 20% by weight of polyethylene glycol having a molecular weight of 2,000, 5% by weight of polyethylene oxide having a molecular weight of 500,000 and 1% by weight of polysiloxane was prepared. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
(Comparative Example 10)
A lubricating resin consisting of 60% by weight of distilled water, 1% by weight of water-soluble acrylic polymer, 25% by weight of polyethylene glycol having a molecular weight of 1,000, 10% by weight of polyethylene glycol having a molecular weight of 2,000, 3% by weight of polyethylene oxide having a molecular weight of 2,000,000 and 1% Respectively. Using the above lubricating resin, an entry sheet for a printed circuit board blank was manufactured in the same manner as in Example 1.
In Comparative Examples 1 to 10, the distilled water was fixed at 60% by weight, the molecular weight of the polyethylene glycol was less than 4,000, the weight ratio thereof was varied, and the molecular weight of the polyethylene oxide was varied to more than 300,000. And mixing them to prepare a lubricating resin.
The composition of the lubricating resin described in Comparative Examples 1 to 10 and the composition ratio thereof are summarized in Table 2 below.
<Table 2>
The lubricating resin prepared in Examples 1 to 16 and Comparative Examples 1 to 10 having different molecular weights or composition ratios was coated on an aluminum foil to be dried, The entry sheet was placed on a printed circuit board and perforated using a perforated drill. Table 3 below compares the physical properties of the entry sheet for a printed circuit board having a lubricous resin layer coated with different molecular weights or composition ratios while performing these operations.
The evaluation was made by visual observation in this comparison, and the evaluation states were classified by the following criteria: surface coating state, adhesion property, resin layer curl, piercing property, washability, etc. ⊚: very good, ◯: good, ㅿ: fair, and ×: poor.
The puncture accuracy of this comparison was measured by measuring the process capability index (cpk value) using an automated optical inspector after drilling the holes formed at the bottom of the printed circuit board stack.
<Table 3>
As can be seen from Table 3, the molecular weight or the composition ratio of Examples 1 to 16 is such that polyethylene glycol has a molecular weight in the range of 4,000 to 20,000, polyethylene oxide has a molecular weight in the range of 100,000 to 300,000, A polyethylene glycol having a molecular weight of 8,000 and a polyethylene glycol having a molecular weight of 6,000 at a composition ratio of 5 to 10% by weight and polyethylene oxide having a molecular weight of 100,000 to 300,000 at 8 to 20% by weight, 10% by weight, and the polysiloxane is constituted at a composition ratio of 1% by weight. The composition is mixed with 60% by weight of distilled water and 3 to 10% by weight of a water-soluble acrylic polymer, It is most preferable to form the lubricous resin layer of the sheet. It can be seen from the fact that evaluation of the physical properties of the lubricant resin layer having the molecular weight and composition ratio of Comparative Examples 1 to 10 was evaluated to be generally poor except for adhesion.
In each of Examples 1 to 16, a value of 1.251 or less was obtained as the puncture accuracy (cpk) value, but the values of Comparative Examples 1 to 10 were 2.000 or more, and the molecular weights of Examples 1 to 16 Or a composition ratio of the lubricant resin is most preferable for forming the lubricant resin layer of the printed circuit board blank entry sheet.
INDUSTRIAL APPLICABILITY An entry sheet for a printed circuit board blank according to the present invention and a method of manufacturing the same can be said to be industrially applicable because it is possible to repeatedly manufacture the same product in the manufacturing industry of a printed circuit board by the same manufacturing method .
Claims (7)
Wherein the printed circuit board perforated entry sheet comprises:
A metal thin film;
Soluble acrylic polymer prepared by mixing and stirring isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile, and the like on the metal foil film with distilled water, polyethylene glycol, polyethylene oxide, polysiloxane, A lubricating resin layer formed by coating a lubricating resin prepared by mixing and mixing the mixture with the water-soluble acrylic polymer on the metal foil; Wherein said first and second sheet members are bonded to each other.
The water-soluble acrylic polymer is obtained by polymerizing 30 to 38% by weight of methyl acrylate, 2 to 10% by weight of acrylic acid and 0.25 to 0.65% by weight of azobisisobutyronitrile in 50 to 66% by weight of isopropyl alcohol maintaining a temperature of 70 캜 Then, 1 wt% of isopropyl alcohol and 0.05 wt% of azobisisobutyronitrile were mixed again in 98.95 wt% of the first mixture, and then the mixture was stirred and mixed at a second temperature and cooled at room temperature to obtain a second mixture And an aqueous acrylic polymer is mixed with 90 to 95% by weight of the secondary mixture and 5 to 10% by weight of an aqueous ammonia solution of 19% by weight and stirred in a third order to form a water-soluble acrylic polymer.
The lubricating resin was prepared by adding 8 to 10 wt% of polyethylene oxide having a molecular weight of 100,000 to 300,000, 6 to 7 wt% of polyethylene glycol having a molecular weight of 20,000, and 7 to 10 wt% of polyethylene glycol having a molecular weight of 8,000 to 60 wt% And 5 to 9% by weight of polyethylene glycol having a molecular weight of 6,000 were added and dissolved to prepare a mixture. Then, 1 weight% of polysiloxane was added to 89 to 96% by weight of the mixture thus prepared, and the mixture was stirred and cooled at room temperature, By weight of the water-soluble acrylic polymer, and 3 to 10% by weight of the water-soluble acrylic polymer is added and stirred into 90 to 97% by weight of the mixture which has been cooled.
The metal thin film is an aluminum thin film having a thickness of 0.05 to 0.5 mm,
Wherein the thickness of the lubricant resin layer formed on the metal foil film is 0.01 to 0.3 mm.
A method of manufacturing an entry sheet for a printed circuit board (1)
(1) a step of producing a water-soluble acrylic polymer by mixing and stirring (i) isopropyl alcohol, methyl acrylate, acrylic acid, azobisisobutyronitrile and the like; (ii) Preparing a mixture by mixing and dissolving glycol, polyethylene oxide, polysiloxane, and the like, and mixing and stirring the water-soluble acrylic polymer to the mixture;
2) a lubricating resin layer forming step of forming a lubricating resin layer by coating the lubricating resin on a metal foil;
3) a drying step in which a treatment process of drying the lubricating resin layer is performed; Wherein the step of forming the sheet comprises the steps of:
The step (i) of producing the water-soluble acrylic polymer in the step (1)
30 to 38% by weight of methyl acrylate, 2 to 10% by weight of acrylic acid and 0.25 to 0.65% by weight of azobisisobutyronitrile are mixed with 50 to 66% by weight of isopropyl alcohol maintaining a temperature of 70 DEG C, Step,
A second mixing step of mixing and stirring 1 wt% of isopropyl alcohol and 0.05 wt% of azobisisobutyronitrile in 98.95 wt% of the mixture in which the primary mixing step has been performed, and cooling the mixture at room temperature to form a mixture;
And a tertiary mixing step in which 90 to 95% by weight of the mixture in which the secondary mixing step is performed is added and stirred with 5 to 10% by weight of a 19% aqueous ammonia solution to prepare a water-soluble acrylic polymer. (EN) METHOD FOR MANUFACTURING ENTRY SHEET.
(Ii) mixing and dissolving distilled water, polyethylene glycol, polyethylene oxide, polysiloxane or the like in the lubricant resin production step and mixing and stirring the water-soluble acrylic polymer into the mixture,
8 to 10% by weight of a polyethylene oxide having a molecular weight of 100,000, 6 to 7% by weight of a polyethylene glycol having a molecular weight of 20,000, 7 to 10% by weight of a polyethylene glycol having a molecular weight of 8,000, polyethylene glycol 5 having a molecular weight of 6,000 By weight to 9% by weight,
Adding 1% by weight of polysiloxane to 89 to 96% by weight of the mixture thus prepared, and cooling the mixture at room temperature;
And mixing and stirring 3 to 10 wt% of the water-soluble acrylic polymer in 90 to 97 wt% of the cooled mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150074712A KR20160139574A (en) | 2015-05-28 | 2015-05-28 | A entry sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150074712A KR20160139574A (en) | 2015-05-28 | 2015-05-28 | A entry sheet |
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| KR20160139574A true KR20160139574A (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150074712A KR20160139574A (en) | 2015-05-28 | 2015-05-28 | A entry sheet |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100672775B1 (en) | 2005-12-05 | 2007-01-22 | 김상건 | Coating material for entry sheet, method of manufacturing a coating material for entry sheet and entry sheet |
| KR100889702B1 (en) | 2008-06-06 | 2009-03-20 | 주식회사 아이에스테크 | Vibration adsorption sheet for drilling |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100672775B1 (en) | 2005-12-05 | 2007-01-22 | 김상건 | Coating material for entry sheet, method of manufacturing a coating material for entry sheet and entry sheet |
| KR100889702B1 (en) | 2008-06-06 | 2009-03-20 | 주식회사 아이에스테크 | Vibration adsorption sheet for drilling |
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