KR20130051961A - 3-dimensional interconnect module and apparatus for manufacturing same - Google Patents

Abstract

PURPOSE: A three-dimensional molded interconnection module and a manufacturing device thereof are provided to effectively extract gas included in molten resin for injection molding and to mold an injection molded product of high quality in a three-dimensional shape. CONSTITUTION: A device for manufacturing a three-dimensional molded interconnection module comprises a supply unit(20), a heating unit(30), an exhausting unit(50), an injection molding unit(40), and a pattern unit. The injection molding unit molds molten resin in which gas is exhausted and manufactures a three-dimensional injection molded product. The pattern unit forms a circuit pattern in the three-dimensional injection molded product. The exhausting unit guides the molten resin to flow in a specific section and exhausts the gas from the molten resin by surrounding a plurality of exhausting members where the outer side in a specific section is formed in a ring shape. [Reference numerals] (20) Supply unit; (30) Heating unit; (40) Injection unit; (50) Exhaust unit; (60) Electrode forming unit

Description

Three-dimensional molded interconnect module and its manufacturing apparatus {3-DIMENSIONAL INTERCONNECT MODULE AND APPARATUS FOR MANUFACTURING SAME}

TECHNICAL FIELD The present invention relates to an apparatus for manufacturing an electronic component, and more particularly, to a three-dimensional molded interconnect module formed by injection molding and an apparatus for manufacturing the same.

In recent years, manufacturers of portable electronic devices are focusing on miniaturization, slimming, and lightweighting products in order to meet consumer needs. In addition, products with designs with various shapes are being produced, and convergence of electronic devices is accelerating.

Convergence refers to making electronic devices that can accommodate all the functions of several electronic devices. According to the convergence of the electronic device, the appliance is made of a complicated structure with various components, so that it is made of a thermoplastic resin that is easy to mold. On the other hand, the printed circuit board provided in the apparatus is generally made of the above-described copper clad laminate, it is difficult to form a three-dimensional free curved surface according to the inner surface of the apparatus.

This results in an increase in the usable space between the apparatus and the printed circuit board, and requires a variety of additional devices such as switches, wires, connectors, etc. to transmit the user's input signal to the circuit through the apparatus. Therefore, the result is that the manufacturing cost is increased without satisfying the consumer who demands miniaturization, slimming, and lightening of the product. In addition, a problem arises that the constraint of the apparatus is limited and thus the shape of the apparatus is limited to have a low degree of freedom.

Recently, a method of directly forming an electrode circuit inside a three-dimensional shaped appliance case has also been introduced, but this method also has high-quality molded products due to the gas contained in the molten resin when melting the raw materials in molding the three-dimensional molded article by injection molding. Not only can not be obtained, but this causes a lot of difficulties in forming the electrode circuit inside the three-dimensional shaped body case.

The present invention has been proposed to solve the conventional problems as described above, an object of the present invention is to effectively extract the gas contained in the molten resin forming the injection molding of the three-dimensional shape injection molding of a high quality three-dimensional shape It is to provide a method for producing a and an injection molded article of the three-dimensional shape produced by the method.

In addition, the present invention has another object to make it easy to form the electrode circuit in the three-dimensional injection molding by manufacturing the injection molded product of the three-dimensional shape in this way.

In order to achieve the above object, the three-dimensional molding interconnect module manufacturing method according to the present invention comprises the steps of: supplying injection molding raw material, heating the supplied raw material to form a molten resin, exhaust gas from the molten resin And forming a three-dimensional injection molding by injection molding the molten resin in which the gas is exhausted, and forming an electrode circuit on the three-dimensional injection molding.

In addition, according to the present invention, the raw material is a resin material, characterized in that any one of polyethylene, polypropylene, polyester, polystyrene, liquid crystal polymer.

In addition, according to the present invention, the raw material is characterized in that it further comprises an inorganic fiber filler.

In addition, according to the present invention, the raw material is characterized in that the mixture of a thermoplastic resin and a compound.

In addition, according to the present invention, the compound is characterized by consisting of a compound of a metal and a non-metal.

According to the present invention, the step of forming the electrode circuit, forming an injection mask on a portion of the three-dimensional injection molding, the step of activating by exposing the three-dimensional injection molding to acid, the three-dimensional injection molding Electroless plating, electroplating the three-dimensional injection molding, and removing the injection mask from the three-dimensional injection molding.

According to the present invention, the step of forming the electrode circuit, the step of activating the three-dimensional injection molding by exposing the acid, electroless plating on the three-dimensional injection molding, a part of the three-dimensional injection molding Forming an injection mask, electroplating the three-dimensional injection molding, and removing the three-dimensional injection mask from the injection molding.

In addition, according to the present invention, the three-dimensional injection molding guides the molten resin to flow for a predetermined section, while the exhaust gas is exhausted from the molten resin by surrounding the plurality of exhaust members formed in a ring shape outside the predetermined section. It features.

In addition, according to the present invention, the exhaust member has a first projection protruding in the longitudinal direction on one side outer peripheral surface, a second projection having a micro groove for exhaust protruding in the longitudinal direction and formed in the radial direction on one side inner peripheral surface, the first And a gas chamber formed between the protrusion and the second protrusion.

In addition, according to the present invention, the first projection is characterized in that formed in the longitudinal direction higher than the second projection.

In addition, according to the invention, the exhaust member is characterized in that divided into a plurality of pieces.

In addition, according to the present invention, the first projection of the exhaust member is characterized in that the plurality of exhaust holes for further discharging the gas is further provided.

In addition, according to the present invention, the first projection of the exhaust member is characterized in that it consists of a plurality of projections divided at intervals so as to discharge the gas.

In addition, according to the present invention, in order to guide the molten resin to flow for a predetermined period, characterized in that it comprises a guide member having a guide groove for guiding the movement of the molten resin along the longitudinal direction on the outer surface.

In addition, according to the present invention, the fine groove of the exhaust member is characterized in that it is formed by any one of etching, electrical discharge processing, laser processing.

In order to achieve the above object, a three-dimensional molding interconnect module manufacturing apparatus according to the present invention includes a supply unit for supplying injection molding raw material, a heating unit for heating the supplied raw material to form a molten resin, and a gas from the molten resin. And an exhaust part for exhausting, an injection part for manufacturing a three-dimensional injection molding by injection molding the molten resin in which the gas is exhausted, and a pattern part for forming a circuit pattern on the three-dimensional injection molding.

In addition, according to the present invention, the exhaust portion guides the molten resin to flow for a predetermined period, and the gas is exhausted from the molten resin by enclosing a plurality of exhaust members formed in a ring shape outside the predetermined section. .

According to the three-dimensional molding interconnect module of the present invention and its manufacturing apparatus, there is an advantage that the gas contained in the molten resin for injection molding can be effectively extracted to form a high quality three-dimensional molded article.

Further, according to the three-dimensional molded interconnect module of the present invention and its manufacturing apparatus, there is an advantage that the electrode circuit can be easily formed inside the molded article of the three-dimensional shape by manufacturing the molded article of the three-dimensional shape by the above method. .

1 is a block diagram of a three-dimensional molded interconnect module manufacturing apparatus according to the present invention.
Figure 2 is a perspective view of the injection unit used in the present invention.
Figure 3 is an exploded perspective view of the injection unit used in the present invention.
Figure 4 is a longitudinal sectional view of the injection unit used in the present invention.
5 is a perspective view for explaining the configuration of the guide member of the exhaust portion used in the present invention.
Figure 6 is a perspective view for explaining the exhaust member of the exhaust unit used in the present invention.
7 is a front view of the exhaust member of the exhaust unit used in the present invention.
8 is a series of reference diagrams for explaining a method of forming a microgroove in an exhaust member of an exhaust portion used in the present invention by etching;
9 is a flow chart for explaining the formation of fine grooves in the exhaust member of the exhaust part used in the present invention by etching.
10 and 11 are flowcharts for explaining a method of forming a fine groove by laser processing on the exhaust member of the exhaust unit used in the present invention.
12 is a use state diagram for explaining a configuration in which gas can be forcibly separated from a molten resin using a vacuum pump.
Figure 13 is a reference perspective view for explaining a modified configuration of the guide member of the exhaust portion used in the present invention.
14 is a sectional view according to II of FIG. 13;
15 to 17 are reference front views for explaining the exhaust member of the deformed form.
18 is a plan view showing an application example of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an apparatus assembly 10 for manufacturing a three-dimensional molded interconnect module according to the present invention, which includes an injection molding apparatus 100 and an electrode forming portion 60, and the injection molding apparatus. 100 includes a supply unit 20, a heating unit 30, an injection unit 40, and an exhaust unit 50.

The supply unit 20 is a device for supplying the raw material into the heating cylinder, it may be composed of a hopper for supplying the raw material, a transfer screw for transferring the raw material supplied from the hopper and a motor for supplying power. Here, the raw material sensor may be further configured to measure and control the supply of the raw material so that the raw material is quantitatively supplied to the transfer screw.

The raw material supplied to the supply unit 20 may be any thermoplastic resin such as polyethylene, polypropylene, polyester, polystyrene, liquid crystal polymer, and the like as a heat-resistant resin material. The thermoplastic resins have good moldability and have excellent engineering properties, and thus are widely used to manufacture instruments.

In addition, a filler such as an inorganic fiber may be further included in the thermoplastic resin raw material to improve the mechanical strength of the three-dimensional injection molding.

Alternatively, the raw material may be formed by a mixture of a thermoplastic resin and a compound.

Plating of the thermoplastic resin is impossible in principle, but in the case of ABS, plating is possible due to the specificity of the butadiene component included in the material. However, in order to enable plating that is impossible for most thermoplastic resins except ABS, a catalyst must be mixed in the thermoplastic resin.

The surface of the product formed of the thermoplastic resin has a fine unevenness, so there is a possibility that the plating catalyst is attached and plated, but the plating is impossible due to the deterioration of the adhesive property when the plating is actually performed.

Thus, the mixture is mixed with the thermoplastic resin to ensure the conductivity of the three-dimensional injection molding. The compound mixes metals such as gold, silver, platinum, palladium and nonmetals such as tin.

Palladium is mainly used as the metal, and tin is mainly used as the nonmetal. Although the mixing ratio of the metal and the nonmetal is slightly different depending on the properties of the materials to be mixed, the mixing ratio is preferably 25% (mass ratio).

In the selection of the mixture, the following several conditions should be considered. First, the mixture itself must be a nonconductor, there should be no chemical reaction between the mixtures in processes other than plating, and there must be affinity between the thermoplastic resin and the compound. In addition, the mixture should have good high temperature properties, be chemically stable, and non-toxic.

The raw material provided as described above is transferred to the heating unit 30 through the supply unit 20 and is melted into the molten resin by the heating unit in the heating unit 30.

The heating unit 30 is connected to the body of the supply unit 20 through a raw material supply pipe. Therefore, the raw material supplied from the supply part 20 is supplied to a heating cylinder through a raw material supply pipe.

A raw material inlet connected to the raw material supply pipe is formed on an outer circumferential surface of the heating cylinder, and a screw is installed inside the heating cylinder. In addition, the heating cylinder has a built-in heating means for melting the raw material.

Therefore, the raw material supplied to the heating cylinder is melted into the molten resin by the heating means, and the molten resin is supplied to the injection part 40 as the screw rotates. The heating means may be provided with a coil having high electrical resistance.

Hereinafter, the injection unit 40 and the exhaust unit 50 for exhausting the gas from the melted resin will be described in detail with reference to FIGS. 2 to 17.

First, the molten resin melted by the heating unit 30 is injected through the injection unit 40. The injection unit 40 is composed of a main body 110, and the head 120. In addition, the injection unit 40 includes an exhaust unit 50 for exhausting the gas contained in the molten resin, and the exhaust unit 50 includes a guide member 130 and an exhaust member 140. It is done by

By the cooperative operation of the guide member 130 and the exhaust member 140 of the exhaust unit 50, the gas is effectively extracted from the molten resin flowing into the passage 111 inside the main body 110 of the injection unit 40. Can be discharged to the outside.

Hereinafter, the guide member 130 and the exhaust member 140 which exhaust the gas from the molten resin will be described in more detail.

2 is a perspective view of the injection unit 40 according to the present invention, FIG. 3 is an exploded perspective view of the injection unit 40 according to the present invention, and FIG. 4 is a longitudinal sectional view of the injection unit 40 according to the present invention.

First, the main body 110 has a cylindrical shape penetrated therein. The main body 110 is one end is connected to the injection molding machine cylinder to receive the molten resin, the other end is coupled to the head 120. The molten resin passage 111 is formed inside the main body 110. Therefore, the molten resin supplied through one end of the main body 110 is supplied to the head 120 through the passage 111.

In addition, the exhaust member 140 of the exhaust unit 50 for discharging the gas component contained in the molten resin is inserted into the interior space of the main body 110.

In addition, a plurality of gas exhaust ports 112 are formed in the main body 110. The gas exhaust port 112 communicates from the inner circumferential surface to the outer circumferential surface of the main body 110 to serve to finally discharge the gas component contained in the molten resin to the outside of the main body 110.

One end of the head 120 is coupled to the main body 110 and the injection hole 121 is formed at the other end of the head 120 to spray the molten resin toward the mold. Here, the coupling of the main body 110 and the head 120 may be a screw coupling or simply an interference fit method. However, as shown in the drawing, it is preferable that a screw thread is formed on one inner circumferential surface of the main body 110 and an outer circumferential surface of the head 120 so as to be screwed together. In addition, the head 120 is configured to gradually reduce the inner diameter from the end of the main body 110 side to the injection port 121 in order to eject the molten resin having the required diameter.

5 is a view illustrating the configuration of the guide member 130 according to the present invention.

As shown, the guide member 130 according to the present invention is formed with cones (135a, 135b) at both ends, the outer surface of the guide member 130, the first guide groove 131 and the first in the longitudinal direction Two guide grooves 132 are formed. In addition, a support part 133 for supporting the exhaust member 140 is integrally formed at one side of the guide member 130. The support part 133 is formed with a plurality of connecting holes 134.

In addition, the first guide groove 131 formed in the longitudinal direction on the outer circumferential surface of the guide member 130 is bored in the direction of the head 120, the second guide groove 132 is blocked in the head 120 direction have.

In addition, the connection hole 134 serves to connect the molten resin passage 111 and the second guide groove 132.

According to such a configuration, the molten resin supplied to the molten resin passage 111 can be moved in the direction of the head 120 through the second guide groove 132. Thereafter, the molten resin is limited to the movement by the blocked second guide groove 132, and is passed to the first guide groove 131 formed around the molten resin. In this process, the molten resin is thinly and evenly spread and the gas component contained in the molten resin is effectively extracted.

Thereafter, the molten resin moves to the head 120 along the first guide groove 131 and is injected into the mold through the injection hole 121.

6 is a perspective view for explaining the exhaust member 140 according to the present invention, Figure 7 is a front view of the exhaust member 140 according to the present invention.

As shown, the exhaust member 140 according to the present invention is fitted to the guide member 130, and serves to discharge the extracted gas to the outside of the main body (110). To this end, the exhaust member 140 includes a first protrusion 143, a second protrusion 144, and a gas chamber 145.

Here, the first protrusion 143 protrudes in the longitudinal direction on one side outer circumferential surface of the exhaust member 140, the second protrusion 144 protrudes in the longitudinal direction on one side inner circumferential surface of the exhaust member 140. do. In addition, the gas chamber 145 is formed between the first protrusion 143 and the second protrusion 144.

The exhaust member 140 is provided in plural and connected in series to be aligned, and the second protrusion 144 is formed with a fine groove 142. As a result, the gas component included in the molten resin is collected into the gas chamber 145 through the microgroove 142 by the pressure.

Here, the exhaust member 140 may be composed of a plurality of radially divided pieces. There is a fine gap between each piece, through which the gas is released. According to the drawing, the exhaust member 140 is illustrated as being divided into eight pieces, but the number of divided parts is adjustable. In addition, a plurality of exhaust holes 147 are formed in the first protrusion 143 of the exhaust member 140 to discharge gas.

In addition, the second protrusion 144 may be formed shorter in the longitudinal direction than the first protrusion 143. As a result, when the exhaust member 140 is in contact with each other, a passage through which gas flows due to the short width of the first protrusion 143 is provided, thereby extracting the gas component extracted from the molten resin moving along the guide member 130. The gas chamber 145 may be more smoothly introduced.

In addition, the depth of the fine groove 142 is formed to a depth that the molten resin does not flow out even while the gas component is separated from the molten resin smoothly, it is appropriate if the depth of 0.001 ~ 0.02mm.

Forming the microgroove 142 in the exhaust member 140 requires very precise processing, and producing a large amount of the exhaust member 140 in which the microgroove 142 is formed by a conventional metal processing method is required. It costs a lot of money and time. Therefore, it is proposed to form the microgroove 142 of the exhaust member 140 according to the present invention by etching as a method for lowering the production cost and shortening the production time. This will be described with reference to FIGS. 8 and 9.

First, as shown in FIG. 8A, the exhaust member 140 is prepared.

Thereafter, as illustrated in FIG. 8B, a resist layer 161 is formed on the exhaust member 140. At this time, the material constituting the resist layer 161 may be a variety of commonly used resists, such as photoresist or thermosetting resist, may be formed by a film type or spray coating.

Thereafter, as shown in FIG. 8C, the micro pattern 162 is formed in the resist layer 161. The micro pattern formation method may be applied to various methods such as optical lithography, imprint lithography, soft etching, injection molding.

Subsequently, as shown in FIG. 8D, the surface of the exhaust member 140 is etched by etching to remove the resist layer 161 present on the surface of the exhaust member 140. In this case, the etching may be applied in various ways such as dry etching or wet etching. That is, the microcavity 142 may be formed by exposing the exhaust member 140 to a solution to corrode or exposing it to a plasma.

9 is a flowchart illustrating a method of forming a fine groove by etching in the exhaust member 140 according to the present invention.

As shown, forming a resist layer on the exhaust member 140 (S110), forming a micro pattern on the resist layer (S120), and etching a portion of the surface of the exhaust member 140 (S130). And the fine groove 142 through the step of removing the resist layer (S140).

At this time, it is possible to add a titanium coating step (S150), to prevent corrosion by the titanium coating, it is possible to prevent the fine groove 142 is expanded.

As such, when the fine grooves 142 are formed in the exhaust member 140 by etching, the molten resin and the gas may be separated and discharged smoothly.

In addition, the fine groove 142 of the exhaust member 140 may be formed through laser processing.

As described above, the depth of the fine groove 142 is preferably in the range of 0.001 ~ 0.02mm, in order to have such precision can be applied to laser processing suitable for precision processing.

10 and 11 are flowcharts illustrating a method of forming a microgroove in the exhaust member according to the present invention by laser processing.

As shown, the step of polishing the exhaust member 140 surface (S210), the step of removing foreign matters on the surface of the exhaust member 140 (S220), the fine groove 142 by laser processing on the surface of the exhaust member 140 ), The fine groove 142 may be formed through a step S231, a polishing step S233, and a step S235 of coating titanium on the surface of the exhaust member 140.

Here, the step of removing the foreign matter on the surface of the exhaust member 140 (S220) may be carried out in the middle of each step to increase the precision of the fine groove 142 of the exhaust member 140, the polishing (polishing) step (S233) It may also be inserted in the middle of the manufacturing process.

If the step of coating titanium on the surface of the exhaust member 140 (S235), it is possible to prevent the corrosion that may occur on the surface of the exhaust member 140, it is possible to prevent the phenomenon that the fine groove 142 grows. have.

As shown in FIG. 11, the titanium coating steps S237 and S241 may be performed before and after the laser processing step S239, which may increase surface precision and prevent corrosion after processing. As shown in FIG. 10, the step S220 of removing the foreign matter on the surface of the exhaust member 140 may be performed in the middle of each step to increase the precision of the fine groove 142 formed in the exhaust member 140. It may be. The polishing step S233 may also be inserted in the middle of the manufacturing process.

As such, when the micro grooves 142 are formed by laser processing, the micro grooves 142 may be smoother than the surface through the surface processing step, thereby smoothing the gas discharge.

In some cases, for example, the production of small metal parts such as gears for small machines, casting requires a lot of machining, and the use of powder metallurgy can be more economical because of the large amount of metal scrap that is lost. It is also impractical to melt them when making alloys with very high melting points, such as metals such as tungsten, or materials that do not melt together, such as copper and graphite. Powder metallurgy is also used to make porous objects through which liquids or gases can permeate.

In the powder metallurgy method, an exhaust member 140 in which the microgrooves 142 are formed may be manufactured using a sintering method. When the exhaust member 140 is formed by the sintering method, the exhaust member 140 may be precisely formed. In addition, when the fine groove 142 is formed, the gas component included in the molten resin may pass through. Therefore, more effective gas emission can be expected.

12 is a state diagram used to explain a configuration in which gas can be forcibly separated from a molten resin by using a vacuum pump.

As shown, the exhaust unit 50 of the present invention may be provided to install a vacuum pump 150 on the outer peripheral surface of the main body 110 to forcibly separate the gas from the molten resin.

According to such a configuration, the gas is quickly and efficiently extracted from the gas chamber 145, the fragmentation gap of the divided exhaust member 140, the first guide groove 131, the second guide groove 132, and the like. You can do it.

Referring to the accompanying drawings, the operation and operation of the exhaust unit according to the present invention configured as described above are as follows.

The molten resin supplied to the molten resin passage 111 of the main body 110 is supplied to the second guide groove 132 through the connection hole 134 and moves along the second guide groove 132. However, since the end of the second guide groove 132 is blocked, the molten resin is moved along the first guide groove 131 after being passed to the first guide groove 131 while being restricted from movement. In this process, the molten resin is thinly and evenly spread, and the gas component contained in the molten resin is effectively extracted.

Thereafter, the extracted gas component is collected in the gas chamber 145 through a gap formed between the exhaust members 140. In addition, the gas chamber 145 is also collected through a gap between the pieces constituting the exhaust member 140. Then, the collected gas is moved to the inner circumferential surface of the main body 110 through the gap between the pieces constituting the exhaust member 140, and the main gas through the gas exhaust port 112 formed in the main body 110 Final discharge to the outside of the body (110).

Subsequently, a modified configuration of the guide member 130 and the exhaust member 140 according to the present invention will be described.

Figure 13 is a reference perspective view for explaining a modified configuration of the guide member according to the present invention, Figure 14 is a cross-sectional view according to I-I of FIG.

As shown, the deformed guide member 130-2 is not changed in the configuration in which the plurality of guide grooves 131-2 are formed as before deformation, but the guide grooves 131-2 are densely denser than before deformation. It is formed and is characterized in that both of the head 120 and the opposite direction is drilled.

According to such a configuration, compared with the guide member 130 before deformation, the configuration is simpler, which has the advantage of reducing the production cost.

15 to 17 are reference front views for describing the exhaust member of the deformed form.

In the case of Figure 15, the configuration is divided into several pieces compared to the exhaust member 140 before deformation, but characterized in that the exhaust hole 147 formed in the first projection 143 is removed. As such, even when the exhaust hole 147 is excluded, a minute flow path is formed between the gaps of the pieces so that gas can be discharged.

In the case of Figure 16, compared with the exhaust member 140 before deformation is formed of a single body that is not divided into several pieces, characterized in that the first projection 143 is provided with a plurality of exhaust holes 147. According to such a configuration, even if the gas is not discharged between the gaps of the pieces, the gas is smoothly discharged by the plurality of exhaust holes 147 provided in the first protrusion 143.

In the case of FIG. 17, a plurality of pieces divided into spaced portions so that the first protrusions 143 may discharge gas, instead of being formed as a single body that is not divided into pieces in comparison with the exhaust member 140 before deformation. It is characterized by consisting of the projections. According to such a configuration, as in the exhaust hole 147, the gas is smoothly discharged between the gaps of the respective projections.

As such, the molten resin from which the gas is removed by the exhaust part is injected into the three-dimensional mold from the injection part to form a three-dimensional molded product.

Hereinafter, a method of forming an electrode circuit on the three-dimensional molded article thus formed will be described in detail.

On the other hand, after the molding of the three-dimensional injection molded article to improve the adhesion between the three-dimensional injection molding and the injection mask to be described below may be subjected to surface conditioning, such as etching, plasma treatment and chemical treatment.

When the three-dimensional injection molding is formed, an injection mask is formed on the surface through double injection. The injection mask is formed for partial plating of the injection molding. Due to the formation of the injection mask, the part where the injection mask is formed is not plated. As the material of the injection mask, rubber or water soluble resin (WSR: Water Soluble Resin), which is easily removed in a post process, is used. Forming the injection mask on the injection molding is called overmolding.

Thereafter, an activation step is performed to make the metal chemically reactable for electroless plating of the 3D injection molding. When the 3D injection molded product is immersed in an acidic aqueous solution or the like and exposed to an acid, the base metal is removed from the compound. Therefore, the site where the non-metal was was vacant to form a void, the metal is agglomerated with each other and becomes a kind of catalyst. The nonmetal is removed only at the surface of the portion where the injection mask is not formed.

Then, electroless plating is performed on the three-dimensional injection molded product. Electroless plating refers to a method in which metal ions in an aqueous metal salt solution are autocatalytically reduced by the force of a reducing agent without depositing electric energy from the outside, thereby depositing metal on the surface of the workpiece. In general, nickel or copper is used for electroless plating.

After electroless plating, plating of gold, silver, platinum, and chromium may be additionally performed to control circuit characteristics and thickness. When electroless plating is performed, an electroless plating film is formed on the voids and the surface of the three-dimensional injection molding. Of course, the electroless plated film will not be formed in the portion where the injection mask is formed.

After the electroless plating process, the electroplated film is formed by electroplating the 3D injection molded product. In general, since the electroless plating film is formed thinner than the electroplating film, electroplating is performed to compensate for this.

After the electroplating process, the injection mask formed on the three-dimensional injection molding is removed. When the injection mask is formed of rubber, it is removed by applying heat to the injection mask. When the injection mask is formed of a water-soluble resin, the injection molding is immersed in an acidic aqueous solution to remove the injection mask. Through these steps, the circuit pattern is completed.

Another embodiment of forming the electrode circuit of the present invention is to perform the electroless plating step before forming the injection mask. The reason for this is as follows.

One side of the three-dimensional injection molding is provided with a plating ring for immersing the three-dimensional injection molding in a plating solution for a plating bath. At this time, if the step of forming the injection mask is carried out before the electroless plating step, when removing the injection mask and finally remove the plating ring, the trace is left in the portion where the plating ring was provided. Then, if the electroless plating step is carried out first, it is possible to solve the plating defect which was partially caused by the charge density difference. Therefore, the step of forming the injection mask may be performed before the electroless plating.

The three-dimensional injection molded product is formed into a mixture by mixing a thermoplastic resin and a compound. The compound consists of a combination of a metal and a nonmetal. When the three-dimensional injection molding is formed, an activation step is performed to create a state in which the metal can be chemically reacted. At this time, the voids are formed while the nonmetal is removed. Here, electroless plating is performed on the surface of the three-dimensional injection molded product. Then, an electroless plating film is formed on the surfaces of the voids and the injection molded product. Next, an injection mask is formed on the surface of the electroless plating film. An electroplating film is formed on the surface of the electroless plating film through electroplating.

On the other hand, the injection mask is removed, and finally, after the etching step, the electroless plating film formed on the injection mask is removed by acid.

Thus, a three-dimensional molded interconnect module can be manufactured through such a method. Hereinafter, various application examples to which such a three-dimensional molded interconnect module is applied will be described.

Referring first to Figure 18, a three-dimensional molded interconnect substrate can be fabricated by mounting an IC package on a three-dimensional molded interconnect module manufactured in accordance with the present invention.

The substrate has a three-dimensional shape manufactured in accordance with a preferred embodiment of the present invention, the IC package 310, the resistor 330, and the passive chip in the three-dimensional molded interconnect module 300 having an electrical circuit formed on the surface thereof. 320).

In addition, by embedding a resistor such as a thin polymer type or a metal film in the space between the 3D molded interconnect module and the IC package on the IC package, it is possible to improve the mounting density, design freedom, and increase the efficiency of the process. .

In another application example, an optoelectronic device may be mounted on the three-dimensional molded interconnect module manufactured in accordance with the preferred embodiment of the present invention, thereby forming an optoelectronic device component.

And another application includes an optical fiber connected to the three-dimensional molded interconnect module manufactured according to a preferred embodiment of the present invention, and a plug for transmitting / receiving an optical signal via the optical fiber to the three-dimensional molded interconnect module. It can also be combined into the photoelectric conversion connector for an optical fiber.

And another application example is a three-dimensional molded interconnect module mounted on the three-dimensional molded interconnect module manufactured according to a preferred embodiment of the present invention and a sensor chip for converting an acceleration into an electrical signal. Mounted in a connection module and provided with an IC chip for processing an electrical signal of the sensor chip may be configured as an acceleration sensor.

And another application includes a metal body, an LED chip, and a pair of lead terminals electrically connected to the electrodes of the LED chip in the three-dimensional molded interconnect module manufactured according to the preferred embodiment of the present invention. A plurality of LED chip units and a dielectric interposed between the main body and the LED chip unit to electrically connect the two and thermally couple the two may be configured as a lighting apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

10: device assembly 20: supply part
30: heating part 40: injection part
50: exhaust portion 60: electrode forming portion
100: injection molding apparatus 110: main body
111: passage 112: exhaust port
120: head 121: nozzle
130: guide member 131: first guide groove
132: second guide groove 133: support portion
134: connector 135a, 135b: cone
140: exhaust member 142: fine groove
143: first projection 144: second projection
145: gas chamber 300: three-dimensional molded interconnect module

Claims (9)

Supply unit for supplying the injection molding raw material;
A heating unit heating the supplied raw material to form a molten resin;
An exhaust unit for exhausting gas from the molten resin;
An injection unit for injection molding the molten resin in which the gas is exhausted to produce a three-dimensional injection molding; And
It includes a pattern portion for forming a circuit pattern on the three-dimensional injection molding,
The exhaust part guides the molten resin to flow for a predetermined period, and surrounds a plurality of exhaust members formed in a ring shape outside the predetermined portion to exhaust gas from the molten resin. Manufacturing device. The method of claim 1,
The exhaust member may include a first protrusion protruding in a longitudinal direction on one side outer circumferential surface, a second protrusion having a micro groove for exhaust protruding in a longitudinal direction and radially formed on one inner peripheral surface, and between the first protrusion and the second protrusion. 3D molded interconnect module manufacturing apparatus comprising a gas chamber formed. The method of claim 2,
And wherein the first protrusion is formed higher in the longitudinal direction than the second protrusion. The method of claim 2,
Wherein said exhaust member is divided into a plurality of pieces. The method of claim 2,
And a plurality of exhaust holes capable of discharging gas in the first protrusion of the exhaust member. The method of claim 2,
The first projection of the exhaust member is a three-dimensional molded interconnect module manufacturing apparatus, characterized in that consisting of a plurality of projections separated by a space to discharge the gas. The method of claim 2,
And a guide member having a guide groove for guiding the movement of the molten resin along a longitudinal direction on an outer side thereof, to guide the molten resin to flow for a predetermined interval. The method of claim 2,
And the microgroove of the exhaust member is formed by any one of etching, discharging, and laser processing. A three-dimensional molded interconnect module manufactured with the manufacturing apparatus of any one of claims 1 to 8.

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