阅读说明：本技术 一种线路板生产用雕刻复合膜及其生产工艺 (Carved composite film for circuit board production and production process thereof ) 是由 孟凡伟 沈明 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种线路板生产用雕刻复合膜及其生产工艺,属于雕刻复合膜技术领域,包括基层、雕刻层和抗静电层,所述基层和抗静电层之间设置有雕刻层；所述雕刻层包括如下质量份数的原料：光刻胶96～98份、UV胶2～4份；所述抗静电层包括如下质量份数的原料：PET颗粒75～85份、抗静电母粒10～20份、石墨烯2～10份。提高对电荷的排布控制力,进而大幅度提高抗静电性能；且能够提高结构层之间的连接强度,避免污染,提高线路清晰度。(The invention discloses a carved composite membrane for circuit board production and a production process thereof, belonging to the technical field of carved composite membranes and comprising a base layer, a carving layer and an antistatic layer, wherein the carving layer is arranged between the base layer and the antistatic layer; the carving layer comprises the following raw materials in parts by mass: 96-98 parts of photoresist and 2-4 parts of UV (ultraviolet) glue; the antistatic layer comprises the following raw materials in parts by weight: 75-85 parts of PET particles, 10-20 parts of antistatic master batch and 2-10 parts of graphene. The control force of charge arrangement is improved, and the antistatic performance is greatly improved; and the connection strength between the structural layers can be improved, pollution is avoided, and the line definition is improved.)

1. The carving composite film for producing the circuit board is characterized by comprising a base layer (1), a carving layer (2) and an antistatic layer (3), wherein the carving layer (2) is arranged between the base layer (1) and the antistatic layer (3);

the base layer (1) comprises the following raw materials in parts by mass: 85-98 parts of PET particles and 2-15 parts of insulating oil;

the carving layer (2) comprises the following raw materials in parts by weight: 96-98 parts of photoresist and 2-4 parts of UV (ultraviolet) glue;

the antistatic layer (3) comprises the following raw materials in parts by weight: 75-85 parts of PET particles, 10-20 parts of antistatic master batch and 2-10 parts of graphene.

2. The engraved composite film for producing circuit boards as claimed in claim 1, wherein said base layer (1) comprises the following raw materials in parts by mass: 92 parts of PET particles and 8 parts of insulating oil.

3. The engraved composite film for manufacturing printed circuit boards as claimed in claim 1, wherein said insulating oil is a synthetic insulating oil formed by mixing any one or more of silicone oil, dodecylbenzene, polyisobutylene, isopropylbiphenyl, and diarylethane.

4. The engraved composite film for producing circuit boards as claimed in claim 1, wherein the engraved layer (2) comprises the following raw materials in parts by mass: 98 parts of photoresist and 2 parts of UV (ultraviolet) glue.

5. The engraved composite film for manufacturing printed circuit boards as claimed in claim 1, wherein said UV glue is distributed on both sides of said photoresist.

6. The engraving composite film for producing the circuit board according to claim 1, wherein the antistatic master batch is a mixture of ethoxylated lauramide, ethoxylated stearylamine and insulating oil.

7. The engraving composite film for producing the circuit board as claimed in claim 1, wherein the antistatic layer (3) comprises the following raw materials in parts by mass: 85 parts of PET particles, 10 parts of antistatic master batch and 5 parts of graphene.

8. The engraving composite film for producing the circuit board as claimed in claim 1, wherein the antistatic layer (3) comprises the following raw materials in parts by mass: 80 parts of PET particles, 15 parts of antistatic master batch and 5 parts of graphene.

9. The engraving composite film for producing the circuit board as claimed in claim 1, wherein the antistatic layer (3) comprises the following raw materials in parts by mass: 75 parts of PET particles, 20 parts of antistatic master batch and 5 parts of graphene.

10. A process for producing an engraved composite film for the production of circuit boards according to any of claims 1 to 7, comprising the steps of:

s101: cleaning the carrier, taking a plate-shaped carrier, cleaning and drying the plate-shaped carrier, and removing carrier pollutants and water vapor by adopting a mode of combining wet cleaning, deionized water washing and dehydration baking;

s102: coating a base layer (1) thinly, melting PET particles, adding insulating oil, mixing to obtain a base solution, and spraying the base solution on a carrier;

s103: spin-coating the engraving layer (2), and sequentially spin-coating UV glue and photoresist on the surface of the base layer (1);

s104: curing and drying, namely curing the UV adhesive through ultraviolet irradiation, then covering a mask plate on the surface of the engraving layer (2), and scanning, stepping, projecting and exposing;

s105: developing by adopting a mode of combining continuous spraying and automatic rotation, namely spraying a developing solution on the surface of the photoresist by adopting one or more nozzles, rotating the carrier at a low speed of 100-500 rpm, standing, then hard-baking at 100-130 ℃ for 1-2 minutes, and spin-coating UV (ultraviolet) glue on the surface of the photoresist after developing;

s106: spin coating antistatic layer (3), get PET granule and melt back and mix with graphite alkene and be the shielding liquid, get PET granule and antistatic master batch and melt the mixture and be antistatic liquid, in carving antistatic liquid, shielding liquid and antistatic liquid of layer (2) surface spin coating in proper order.

Technical Field

The invention relates to the technical field of carved composite membranes, in particular to a carved composite membrane for producing a circuit board and a production process thereof.

Background

The circuit board has the characteristics of high wiring density, light weight, thin thickness and good bending property, so that the circuit is miniaturized and visualized, and plays an important role in batch production of fixed circuits and optimization of electric appliance layout. Because the wiring density is high, the circuits need to be carved, and short circuit caused by mutual contact after the circuits are densely arranged is prevented; therefore, the engraving composite film needs to be matched in the production process of the circuit board, but the existing engraving film in the current market has poor internal bonding degree, so that the bonding between the inner film layers is not tight, the shear strength is low, and loose layers are easy to appear.

Disclosure of Invention

The invention aims to provide a carved composite film for circuit board production and a production process thereof, which improve the control force of charge arrangement and further greatly improve the antistatic performance; and the connection strength between the structural layers can be improved, pollution is avoided, and the line definition is improved so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a carving composite film for producing a circuit board comprises a base layer, a carving layer and an antistatic layer, wherein the carving layer is arranged between the base layer and the antistatic layer;

the base layer comprises the following raw materials in parts by mass: 85-98 parts of PET particles and 2-15 parts of insulating oil;

the carving layer comprises the following raw materials in parts by mass: 96-98 parts of photoresist and 2-4 parts of UV (ultraviolet) glue;

the antistatic layer comprises the following raw materials in parts by weight: 75-85 parts of PET particles, 10-20 parts of antistatic master batch and 2-10 parts of graphene.

Further, the base layer comprises the following raw materials in parts by weight: 92 parts of PET particles and 8 parts of insulating oil.

Further, the insulating oil is synthetic insulating oil which is formed by mixing any one or more of silicone oil, dodecyl benzene, polyisobutylene, isopropyl biphenyl and diarylethane.

Further, the carving layer comprises the following raw materials in parts by weight: 98 parts of photoresist and 2 parts of UV (ultraviolet) glue.

Furthermore, the UV glue is distributed on the front side and the back side of the photoresist.

Further, the antistatic master batch is a mixture of ethoxylated lauramide, ethoxylated stearylamine and insulating oil.

Further, the antistatic layer comprises the following raw materials in parts by weight: 85 parts of PET particles, 10 parts of antistatic master batch and 5 parts of graphene.

Further, the antistatic layer comprises the following raw materials in parts by weight: 80 parts of PET particles, 15 parts of antistatic master batch and 5 parts of graphene.

Further, the antistatic layer comprises the following raw materials in parts by weight: 75 parts of PET particles, 20 parts of antistatic master batch and 5 parts of graphene.

According to another aspect of the present invention, there is provided a process for producing an engraved composite film for circuit board production, comprising the steps of:

s101: cleaning the carrier, taking a plate-shaped carrier, cleaning and drying the plate-shaped carrier, and removing carrier pollutants and water vapor by adopting a mode of combining wet cleaning, deionized water washing and dehydration baking;

s102: coating a base layer thinly, melting PET particles, adding insulating oil, mixing to obtain base liquid, and spraying the base liquid on a carrier;

s103: spin-coating the engraving layer, and sequentially spin-coating UV glue and photoresist on the surface of the base layer;

s104: curing and drying, namely curing the UV adhesive through ultraviolet irradiation, then covering a mask plate on the surface of the engraving layer, and scanning, stepping, projecting and exposing;

s105: and developing by adopting a mode of combining continuous spraying and automatic rotation, namely spraying a developing solution on the surface of the photoresist by adopting one or more nozzles, rotating the carrier at a low speed of 100-500 rpm, standing, then hard-baking at 100-130 ℃ for 1-2 minutes, and spin-coating UV (ultraviolet) glue on the surface of the photoresist after developing.

S106: spin-coating an antistatic layer, mixing PET particles with graphene after melting to form a shielding liquid, melting and mixing the PET particles and antistatic master batches to form an antistatic liquid, and spin-coating the antistatic liquid, the shielding liquid and the antistatic liquid on the surface of the engraving layer in sequence.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the carving composite film for producing the circuit board and the production process thereof, the PET layer containing the antistatic master batch is coated on the surface of the photoresist, the graphene is doped in the middle of the structure layer, the shielding, insulating and antistatic components are comprehensively used, the control force of charge arrangement is improved, and the antistatic performance is greatly improved.

2. According to the carving composite film for producing the circuit board and the production process thereof, the UV glue is coated on the front side surface and the back side surface of the photoresist, so that the connection strength between the structural layers can be improved, the photoresist can be quickly cured, the photoresist is prevented from being deviated after exposure, the protection is formed on the surface of the photoresist, the pollution is avoided, and the circuit definition is improved.

Drawings

FIG. 1 is an overall structural view of an engraved composite film for circuit board production according to the present invention;

FIG. 2 is a flow chart of the production process of the carved composite membrane for producing the circuit board.

In the figure: 1. a base layer; 2. engraving the layer; 3. and an antistatic layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, the carved composite film for circuit board production comprises a base layer 1, a carved layer 2 and an antistatic layer 3, wherein the carved layer 2 is arranged between the base layer 1 and the antistatic layer 3; the base layer 1 comprises the following raw materials in parts by mass: 92 parts of PET particles and 8 parts of insulating oil, wherein the insulating oil is synthetic insulating oil which is formed by mixing silicone oil, dodecyl benzene and diarylethane in equal amount; the engraving layer 2 comprises the following raw materials in parts by mass: 98 parts of photoresist and 2 parts of UV (ultraviolet) glue, wherein the UV glue is distributed on the front side and the back side of the photoresist; the antistatic layer 3 comprises the following raw materials in parts by weight: 85 parts of PET particles, 10 parts of antistatic master batch and 5 parts of graphene, wherein the antistatic master batch is a mixture of ethoxylated lauramide, ethoxylated stearylamine and insulating oil.

Referring to fig. 2, in order to better show the production process flow of the engraved composite film for producing the circuit board, the embodiment now provides a production process of the engraved composite film for producing the circuit board, which includes the following steps:

s101: cleaning the carrier, taking a plate-shaped carrier, cleaning and drying the plate-shaped carrier, and removing carrier pollutants and water vapor by adopting a mode of combining wet cleaning, deionized water washing and dehydration baking;

wherein, the temperature of the carrier plate body reaches 150-250 ℃ during dehydration and drying, the drying lasts for 1-2 minutes, and nitrogen protection is sprayed; the step can remove particles, organic matters, process residues and mobile ions on the surface of the carrier; the surface of the carrier is changed from hydrophilicity to hydrophobicity, so that the adhesion of the surface to the base layer 1 is enhanced;

s102: coating a base layer 1 thinly, melting PET particles, adding insulating oil, mixing to obtain a base solution, and spraying the base solution on a carrier;

the surface of the carrier is made to have hydrophobicity, the adhesion between the surface of the substrate and the photoresist is enhanced, the PET has an antistatic property, and an insulating antistatic protective layer can be formed by matching the PET with insulating oil, so that the requirement on the property of the carrier is reduced, and the possibility of breakdown short circuit between dense circuits of the circuit board is reduced;

s103: spin-coating the engraving layer 2, and sequentially spin-coating UV glue and photoresist on the surface of the base layer 1;

the spin coating is to drip, accelerate and spin the photoresist when the carrier is static, wherein the photoresist rotates at a low speed of 500rpm, the solvent of the photoresist after the dripping accounts for about 65-85%, the solvent of the photoresist after the spin coating accounts for about 10-20%, the UV photoresist rotates at a high speed of 3000rpm, and the thickness of the UV photoresist after the dripping is 1/6-1/10 of the thickness of the photoresist; the UV glue enhances the adhesiveness of both sides of the photoresist.

S104: curing and drying, namely curing the UV adhesive through ultraviolet irradiation, then covering a mask plate on the surface of the engraving layer 2, and scanning step-by-step projection exposure;

s105: and developing by adopting a mode of combining continuous spraying and automatic rotation, namely spraying a developing solution on the surface of the photoresist by adopting one or more nozzles, rotating the carrier at a low speed of 100-500 rpm, standing, then hard-baking at 100-130 ℃ for 1-2 minutes, and spin-coating UV (ultraviolet) glue on the surface of the photoresist after developing.

S106: spin coating antistatic layer 3, get PET granule and melt back and mix with graphite alkene and be the shielding liquid, get PET granule and antistatic master batch and melt the mixture and be antistatic liquid, spin coating antistatic liquid, shielding liquid and antistatic liquid in carving layer 2 surface in proper order.

Example two

The difference between this embodiment and the first embodiment is only that the parts of the components of the antistatic layer 3 in this embodiment are different, and the antistatic layer 3 in this embodiment includes the following raw materials in parts by mass: 80 parts of PET particles, 15 parts of antistatic master batch and 5 parts of graphene.

EXAMPLE III

The difference between this embodiment and the first embodiment is only that the parts of the components of the antistatic layer 3 in this embodiment are different, and the antistatic layer 3 in this embodiment includes the following raw materials in parts by mass: 75 parts of PET particles, 20 parts of antistatic master batch and 5 parts of graphene.

Comparative example 1

The difference between the comparative example and the first example is only that the parts of the components of the antistatic layer 3 in the comparative example are different, and the antistatic layer 3 in the comparative example comprises the following raw materials in parts by mass: 80 parts of PET particles and 20 parts of antistatic master batch.

Comparative example No. two

The difference between the comparative example and the first example is only that the parts of the components of the engraving layer 2 in the comparative example are different, and the engraving layer 2 in the comparative example comprises the following raw materials in parts by mass: and 100 parts of photoresist.

The mass parts of the components in the carved composite membranes in the above examples and comparative examples are counted, and the obtained data are shown in the following table 1:

table 1 statistical data of parts by mass of components in engraved composite films

The method comprises the steps of producing engraved composite films by using raw materials in the first to third examples and the first to second comparative examples, selecting 100 engraved composite films with completely identical areas and thicknesses in each example, and detecting various properties of the engraved composite films by the following methods: 1 antistatic value measurement, parallel probe impedance measurement method: during testing, a test object is flatly placed on the plane of the insulating plate, the megohmmeter is flatly placed on the surface of the object to be measured, the switch is adjusted to a required voltage position (10 volts is used for measuring <106 omega/100 volts is used for measuring a range of ≧ 106 omega), the measuring button is continuously pressed with the pressure of about 5 pounds, and at the moment, the LCD screen can display the measured surface impedance, the temperature and the relative humidity value, and the whole measuring process is about 15 seconds; 2, testing the shear stress strength by adopting a Dage 4000 shear stress strength tester, and 3, detecting the definition and the accuracy of a line by utilizing a scanner. The statistical test result data are shown in the following table 2:

TABLE 2 engraving composite film Properties

According to the test data in the first to third examples and the first to second comparative examples, as the number of the antistatic master batches increases, the number of the PET particles decreases and the antistatic value is 1 x 10¹⁰To 1 x 10¹¹Compared with the first comparative example and the first example, the antistatic value is obviously improved after the graphene is added, and the second comparative example and the second exampleCompared with the prior art, the carving composite film added with the UV glue has the advantages that the shear stress strength is obviously improved, and the separation of a composite film layer is effectively resisted.

In summary, the following steps: according to the carving composite film for producing the circuit board and the production process thereof, the PET layer containing the antistatic master batch is coated on the surface of the photoresist, the graphene is doped in the middle of the structure layer, the shielding, insulating and antistatic components are comprehensively used, the control force of charge arrangement is improved, and the antistatic performance is greatly improved; the UV glue is coated on the front side surface and the back side surface of the photoresist, so that the connection strength between the structural layers can be improved, the photoresist can be quickly cured, the photoresist is prevented from being deviated after being exposed, the protection is formed on the surface of the photoresist, the pollution is avoided, and the circuit definition is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.