Printed circuit board, package and method of manufacturing the same

A printed circuit board includes: a core board including, on a first surface thereof, an element mounting part and an element non-mounting part; an insulation layer disposed on the element non-mounting part; a copper-clad laminate plate disposed on the insulation layer; a first penetration via penetrating the insulation layer and the copper-clad laminate plate; and a second penetration via disposed in the core board and connected to the first penetration via.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims the benefit of Korean Patent Application No. 10-2015-0003598, filed on Jan. 9, 2015 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes.

BACKGROUND

The following description relates to a printed circuit board, a package, and a method of manufacturing thereof.

2. Description of Related Art

Electronic products of IT technology such as mobile phones are required to be multi-functional so that these products are slim, light, and small. In order to cope with this technical requirement, technology for embedding electronic components such as IC, semiconductor chips or active elements and passive elements in a circuit board is implemented. Recently, various technologies for embedding electronic components in the circuit board have been developed. Generally, in order to insert electronic components in a circuit board, a cavity is formed in an insulation layer of the circuit board, and electronic components such as various elements and IC and semiconductor chips are inserted in the cavity.

SUMMARY

According to one general aspect, a printed circuit board includes: a core board including, on a first surface thereof, an element mounting part and an element non-mounting part; an insulation layer disposed on the element non-mounting part; a copper-clad laminate plate disposed on the insulation layer; a first penetration via penetrating the insulation layer and the copper-clad laminate plate; and a second penetration via disposed in the core board and connected to the first penetration via.

The printed circuit board may further include a cavity disposed in the element mounting part and configured to receive an element.

The first penetration via may include an inner wall on which a plating layer is formed and an exposed circuit pattern on which a metal post is formed. An inside of the first penetration via may be filled with a plug ink.

The printed circuit board may further include a mounting pad formed to be exposed to an outside of the printed circuit board on the element mounting part.

The printed circuit board may further include a mounting pad formed to be exposed to an outside of the printed circuit board on a second surface of the core board.

The printed circuit board may further include a metal protection layer formed on a surface of the mounting pad that is exposed to the outside of the printed circuit board.

According to another general aspect, a printed circuit board includes: a core board including, on a first surface thereof, an element mounting part and an element non-mounting part; an insulation layer disposed on the element non-mounting part; a copper-clad laminate plate disposed on the insulation layer; a first penetration via penetrating the copper-clad laminate plate; and a second penetration formed in the core board and connected to the first penetration via.

The printed circuit board may further include a via disposed in the insulation layer and connecting the first penetration via to the second penetration via.

The printed circuit board of claim8, further comprising a cavity formed in the element mounting part and configured to receive an element.

The first penetration via may include an inner wall on which a plating layer is formed, and an inside of the first penetration via may be filled with a plug ink.

The printed circuit board may further include a mounting pad formed to be exposed to an outside of the printed circuit board on the element mounting part.

The printed circuit board may further include a mounting pad formed to be exposed to an outside of the printed circuit board on a second surface of the core board.

The printed circuit board may further include a metal protection layer formed on a surface of the mounting pad that is exposed to the outside of the printed circuit board.

The printed circuit board may further include a metal protection layer formed on a surface of the mounting pad that is exposed to the outside of the printed circuit board.

According to another general aspect, a package includes a printed circuit board including: a core board including, on a first surface of the printed circuit board, an element mounting part and an element non-mounting part, an insulation layer disposed on the element non-mounting part, a copper-clad laminate plate disposed on the insulation layer, and a first penetration via penetrating the insulation layer and the copper-clad laminate plate. The package further includes a first element mounted in the element mounting part.

The package may further include a second element mounted on a second surface of the printed circuit board and electrically connected to a mounting pad that is formed on the second surface of the printed circuit board.

According to another general aspect, a package includes a printed circuit board including: a core board including, on a first surface of the printed circuit board, an element mounting part and an element non-mounting part, an insulation layer disposed on the element non-mounting part, a copper-clad laminate plate formed on the insulation layer, and a first penetration via penetrating the copper-clad laminate plate. The package further includes a first element mounted in the element mounting part.

The package may further include a second element mounted on a second surface of the printed circuit board and electrically connected to a mounting pad that is formed on the second surface of the printed circuit board.

According to another general aspect, a method of manufacturing a printed circuit board includes: preparing a core board that includes, on a first surface thereof, an element mounting part and an element non-mounting part; forming an insulation layer defining an inside hole on the element non-mounting part; forming a copper-clad laminate plate further defining the inside hole on the insulation layer; forming a first penetration via in the inside hole; forming a second penetration via in the core board; and connecting the first penetration via to the second penetration via.

A cavity for receiving an element may be formed in the element mounting part.

The first penetration via may include an inner wall on which a plating layer is formed and an exposed circuit pattern on which a metal post is formed. An inside of the first penetration via may be filled with a plug ink.

The method may further include forming a mounting pad to be exposed to an outside of the printed circuit board on the element mounting part.

The method may further include forming a mounting pad to be exposed to an outside of the printed circuit board on a second surface of the core board.

The method may further include forming a metal protection layer on a surface of the mounting pad that is exposed to the outside of the printed circuit board.

The method may further include, after the preparing of the core board: forming the insulation layer defining the inside hole on the element non-mounting part; forming the copper-clad laminate plate further defining the inside hole on the insulation layer; and forming the first via in the inside hole.

The first penetration via may be connected to the second penetration via by a via formed in the insulation layer.

According to another general aspect, a method of manufacturing a package includes: preparing a core board including, on a first surface thereof, an element mounting part and an element non-mounting part; forming an insulation layer defining an inside hole on the element non-mounting part; forming a copper-clad laminate plate further defining the inside hole on the insulation layer; forming a first penetration via in the inside hole; forming a second penetration via in the core board; connecting the first penetration via to the second penetration via; and disposing a first element in the element mounting part such that the first element is electrically connected to a mounting pad formed on the element mounting part.

The package may further include a second element that is mounted on a second surface of the core board and electrically connected to a mounting pad formed on the second surface of the core board.

The method may further include, after the preparing a core board: forming the insulation layer defining the inside hole on the element non-mounting part of the core board; forming the copper-clad laminate plate further defining the inside hole on the insulation layer; forming the first via in the inside hole; and disposing the first element in the element mounting part such that the first element is electrically connected to the mounting pad formed on the element mounting part.

The first penetration via may be connected to the second penetration via by a via that is formed in the insulation layer.

The package may further include a second element that is mounted on a second surface of the core board and electrically connected to a mounting pad formed on the second surface of the core board.

DETAILED DESCRIPTION

Printed Circuit Board

FIG. 1is a cross-sectional view of printed circuit board1000according to an embodiment.

Referring toFIG. 1, the printed circuit board1000includes a core board10that has an element mounting part A and an element non-mounting part B on a first surface of the core board10, an insulation layer30that is formed on the element non-mounting part B, a copper-clad laminate plate50that is formed on the insulation layer30, and a first penetration via71that penetrates the insulation layer30and the copper-clad laminate plate50. The first penetration via71is connected to a second penetration via73that is formed in the core board10.

The core board10includes a first circuit pattern131, a second core insulation layer112, and a second circuit pattern132that are formed successively on both surfaces of a first core insulation layer111. The core board10is illustrated to have four circuit layers inFIG. 1, but is not limited to this particular structure.

A cavity5for receiving an element is formed in the element mounting part A. Also, the element mounting part A further includes a mounting pad178that is formed to be exposed to the outside. The mounting pad178is a circuit pattern on which an external component such as an electronic element is mounted and to which the external component is electrically connected.

The insulation layer30may be formed by a no-flow prepreg. The copper-clad laminate plate50is formed on the insulation layer30. The insulation layer30is interposed between the core board10and the copper-clad laminate plate50, and functions as a bonding sheet and minimizes an occurrence of warpage in final products.

The insulation layer30and the copper-clad laminate plate50are punched respectively when being formed, or are formed with holes that are formed inside by a drilling process. The first penetration via71that penetrates the insulation layer30and the copper-clad laminate plate50is formed in the inside hole.

A plating layer140is formed on an inner wall of the first penetration via71by a plating process. A metal post150is formed in the first penetration via71on the second circuit pattern132that is exposed to the outside, and a plug ink160is filled in the inside of the first penetration via71.

The metal post150is formed to prevent an open failure of the circuit pattern that may be caused by a resin, which runs down during a process of manufacturing the printed circuit board1000, of the prepreg that is formed on the element non-mounting part B.

The inside of the first penetration via71is filled with the plug ink by plugging. The first penetration via71is filled with the plug ink as an insulative material in order to prevent oxidation of the plating layer140.

The first penetration via71is connected to the second penetration via73. That is, the second penetration via73and the first penetration via71that is formed outside of the core board10are formed individually, and then connected to each other by means of a micro via or a circuit pattern75. This may reduce a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board1000and improve a low degree of freedom for designing a penetration via.

The second surface of the core board10further includes a mounting pad178that is exposed to the outside. The mounting pad178that is formed on the second surface is the same as the mounting pad178that is formed on the element mounting part A of the first surface, and is a circuit pattern for the external component (e.g., an electronic component) to be mounted on and be electrically connected to.

The printed circuit board1000further includes a metal protection layer189that is formed on the mounting pads178. The metal protection layer189may be referred to as UBM (Under Bump Metallurgy), and may include at least one metal selected from nickel (Ni), gold (Au), and ally thereof. The metal protection layer189protects all circuit patterns including the mounting pads178that are exposed to the outside from scratching, corrosion, and moisture.

On the first surface of the printed circuit board1000, an inner solder resist layer6is formed on a remaining region of the element mounting part A that is not occupied by the mounting pattern178and the metal protection layer189. Also, a first solder resist layer7and a second solder resist layer are formed on the element non-mounting part B and the second surface of the printed circuit board1000, respectively. The solder resist layers7and8protect the circuit patterns including the mounting pad178and expose the circuit patterns to the outside as well.

FIG. 2is a cross-sectional view of printed circuit board2000according to another embodiment.

Referring toFIG. 2, the printed circuit board2000includes a core board20that has an element mounting part A and an element non-mounting part B on a first surface of the core board20, an insulation layer40that is formed on the non-mounting part B, a copper-clad laminate plate60that is formed on the insulation layer40, and a first penetration via72that penetrates the copper-clad laminate plate60. The first penetration via72is connected to a second penetration via74that is formed in the core board20.

The core board20includes a first circuit pattern231, a second core insulation layer212, and a second circuit pattern232that are formed successively on both surfaces of a first core insulation layer211. The core board20is illustrated to have four circuit layers inFIG. 2, but is not limited to this particular structure.

A cavity5for receiving an element is formed in the element mounting part A. Also, the element mounting part A further includes a mounting pad278that is formed to be exposed to the outside. The mounting pad278is a circuit pattern on which an external component such as an electronic element is mounted and to which the external component is electrically connected.

The insulation layer20may be formed by a no-flow prepreg. The copper-clad laminate plate60is formed on the insulation layer40. The insulation layer40is interposed between the core board20and the copper-clad laminate plate60, and functions as a bonding sheet and minimizes an occurrence of warpage in final products.

The copper-clad laminate plate60is formed with holes that are formed inside by a drilling process. The first penetration via72is formed in the inside hole.

A plating layer140is formed on an inner wall of the first penetration via72by a plating process, and a plug ink160is filled in the inside of the first penetration via72. The first penetration via72is filled with the plug ink160as an insulative material in order to prevent oxidation of the plating layer140.

The first penetration via72is connected to the second penetration via74. That is, the second penetration via74and the first penetration via72are formed individually, and then connected to each other by means of a micro via or a circuit pattern. This may reduce a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board and improve a low degree of freedom for designing a penetration via. Accordingly, a via77is formed in the insulation layer40to connect the first penetration via72to the second penetration via74.

The second surface of the core board20further includes a mounting pad278that is exposed to the outside. The mounting pad278that is formed on the second surface is the same as the mounting pad278that is formed on the element mounting part A of the first surface, and is a circuit pattern for the external component (e.g., an electronic component) to be mounted on and be electrically connected to.

The printed circuit board2000further includes a metal protection layer289that is formed on the mounting pads278. The metal protection layer289may be referred to as UBM, and may include at least one metal selected from nickel (Ni), gold (Au), and ally thereof. The metal protection layer289protects all circuit patterns including the mounting pads278that are exposed to the outside from scratching, corrosion, and moisture.

On the first surface of the printed circuit board2000, an inner solder resist layer6is formed on a remaining region of the element mounting part A that is not occupied by the mounting pattern278and the metal protection layer289. Also, a first solder resist layer7and a second solder resist layer8are formed on the element non-mounting part B and the second surface of the printed circuit board2000, respectively. The solder resist layers7and8protect the circuit patterns including the mounting pad278, and expose the circuit patterns to the outside as well.

In the printed circuit boards1000and2000, the occurrence of warpage may be minimized by the insulation layers30and40that function as the bonding sheet, and by forming the copper-clad laminate plates50and60on the insulation layers20and30by a lamination process.

In addition, by forming the second penetration vias73and74separately from the respective first penetration vias71and72, and connecting the second penetration vias73and74to the respective first penetration vias71and72by means of a micro via or a circuit pattern (e.g., respective vias75and77), a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board may be minimized and a low degree of freedom for designing a penetration via may be improved.

Package

Referring toFIG. 3, the package1100includes the printed circuit board1000and a first element300that is mounted on the element mounting part A of the printed circuit board1000. The first element300is mounted on the element mounting part A, and electrically connected to the mounting pad178by flip chip bonding using a solder ball195.

Referring toFIG. 4, the package1200is similar to the package1100, but further includes a second element400that is electrically connected to the mounting pad178that is formed on the second surface of the printed circuit board1000. The second element400is mounted on the element mounting part A, and electrically connected to the mounting pad178by bonding using a solder ball196.

FIGS. 5 and 6are cross-sectional views of packages2200and2300according to additional example embodiments.

Referring toFIG. 5, the package2200includes the printed circuit board2000and the first element300that is mounted on the element mounting part A of the printed circuit board1000. The first element300is mounted on the element mounting part A, and electrically connected to the mounting pad278by flip chip bonding using the solder ball195.

Referring toFIG. 6, the package2300is similar to the package2200, but further includes the second element400that is electrically connected to the mounting pad278that is formed on the second surface of the printed circuit board2000. The second element400is mounted on the element mounting part A, and electrically connected to the mounting pad278by bonding using a solder ball196.

In the packages1100,1200,2200and2300, the occurrence of warpage may be minimized. By forming the second penetration vias73and74separately from the respective first penetration vias71and72, and connecting the second penetration vias72and74to the respective first penetration vias71and72by means of a micro via or a circuit pattern (e.g., respective vias75and77), a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board may be minimized and a low degree of freedom for designing a penetration via may be improved.

Method of Manufacturing Printed Circuit Board

FIG. 7is a flowchart showing a method of manufacturing the printed circuit board1000illustrated inFIG. 1, according to tan embodiment.

Referring toFIG. 7, the method of manufacturing the printed circuit board1000includes preparing the core board10that includes the element mounting part A and an element non-mounting part B on the first surface of the core board10(operation S101), forming the insulation layer30that defines an inside hole on the element non-mounting part B of the core board10(operation S102), forming the copper-clad laminate plate50that further defines the inside hole on the insulation layer30(operation S103), and forming the first penetration via71in the inside hole (operation S104). The first penetration via71is connected to the second penetration via73that is formed in the core board10.

FIGS. 11 through 28are process diagrams showing the method of manufacturing the printed circuit board1000.

Referring toFIGS. 11 through 15, the first core metal layer121is disposed on both surfaces of the first core insulation layer111, and the first circuit pattern131is formed on both surfaces of the first core insulation layer111by patterning and processing the first core metal layer121.

The second core insulation layer112is formed on the first circuit pattern131and the second core metal layer122is formed on the first core insulation layer112to form the core board10.

The second circuit pattern132that includes the mounting pad178and the second penetration via73are formed by patterning the second core metal layer122that is formed on the first surface of the core board10.

Referring toFIGS. 16 through 18, the metal post150is formed on the second circuit pattern132that is formed on the first surface of the core board10, and the inner solder resist layer6is formed in the empty spaces between the mounting pads178.

A dry film resist layer9is formed to cover the surfaces of the inner solder resist layer6and the mounting pads178. The dry film resist layer9is a protection layer configured for protecting the surfaces of the inner solder resist layer6and the mounting pads178from the outside. For example, the dry film resist layer9prevents the mounting pads178from being contacted with an etching solution during etching process so that the mounting pads178are protected from being damaged.

Through the aforementioned steps, the core board10including the element mounting part A and the element non-mounting part B on its first surface is prepared.

Referring toFIG. 19, the insulation layer30and the copper-clad laminate plate50that define the inside hole are formed successively on the element non-mounting part B of the core board10. For example, the inside hole may be formed in the insulation layer30by a punching process, and may be further formed in the copper-clad laminate plate50by a drilling process, but is not limited to being formed by these processes.

Referring toFIG. 20, as the insulation layer30and the copper-clad laminate plate50that have the inside hole are formed successively, a hole3is formed in the element non-mounting part B, and the cavity5for receiving an element is formed in the element mounting part A.

The metal post150is exposed to the outside through the hole3. The metal post150is formed to prevent an open failure of the circuit pattern that may be caused by a resin of the insulation layer30that is formed on the element non-mounting part B. The insulation layer30may be formed by a no-flow prepreg.

Referring toFIGS. 21 and 22, a sputter layer88is formed on the dry film resist layer9that is formed on the element mounting part A, and the plating layer140is formed on the inner wall of the hole3by plating process. For example, the sputter layer88and the plating layer140may be formed of copper, which is generally used in this field of technology, but are not limited to this metal.

Referring toFIGS. 23 through 25, the inside of the hole3is filled with the plug ink160by plugging process, and then a grinding process is performed.

The first penetration via71is formed by performing cap plating on the surface of the element non-mounting part B.

The second circuit pattern132having the mounting pad178that is formed on the second surface to be exposed to the outside is formed by performing a tenting process on the first and the second outer surfaces of the core board10. The sputter layer88that is formed on the surface of the element mounting part A is removed by tenting process.

Referring toFIGS. 26 and 27, the first solder resist layer7and the second solder resist layer8are formed respectively on the element non-mounting part B and the second surface of the core board10. The solder resist layers7and8protect the circuit patterns including the mounting pad178and expose the circuit patterns to the outside as well.

The dry film resist layer9that is formed on the element mounting part A is removed.

Referring toFIG. 28, the metal protection layer189is formed on the surfaces of circuit patterns that are formed on the first and the second surfaces of the core board10and have mounting pads178that are exposed to the outside, so that manufacturing of the printed circuit board1000is completed.

The metal protection layer189may be referred to as UBM (Under Bump Metallurgy), and include at least one metal selected from nickel (Ni), gold (Au), and ally thereof. The metal protection layer189protects all circuit patterns including the mounting pads178that are exposed to the outside from a scratch, a corrosion, and a moisture.

FIG. 8is a flowchart showing a method of manufacturing the printed circuit board2000illustrated inFIG. 2, according to an embodiment.

Referring toFIG. 8, the method of manufacturing the printed circuit board2000includes preparing the core board20that includes the element mounting part A and the element non-mounting part B on the first surface of the core board20(operation S201), forming the insulation layer40on the element non-mounting part B of the core board20(operation S202), forming the copper-clad laminate plate60that defines an inside hole on the insulation layer40(operation S203), and forming the first penetration via72in the inside hole (operation S204). The first penetration via72is connected to the second penetration via74that is formed in the core board20.

FIGS. 29 through 46are process diagrams showing the method of manufacturing the printed circuit board2000.

Referring toFIGS. 29 through 33, the first core metal layer221is disposed on both surfaces of the first core insulation layer211, and the first circuit pattern231is formed on both surfaces of the first core insulation layer221by patterning and processing the first metal core layer221.

The second core insulation layer212is formed on the first circuit pattern231and the second core metal layer222is formed on the first core insulation layer212to form the core board20.

The second circuit pattern232that includes the mounting pad278and the second penetration via74are formed by patterning the second core metal layer222that is formed on the first surface of the core board20.

Referring toFIGS. 34 and 35, the inner solder resist layer6is formed in the empty spaces between the mounting pads278.

A dry film resist layer9is formed to cover the surfaces of the inner solder resist layer6and the mounting pads278. The dry film resist layer9is a protection layer configured for protecting the surfaces of the inner solder resist layer6and the mounting pads278from the outside. For example, the dry film resist layer9prevents the mounting pads278from being contacted with an etching solution during etching process so that the mounting pads278are protected from being damaged.

Through the aforementioned steps, the core board20that has the element mounting part A and the element non-mounting part B on the first surface of the core board20is prepared.

Referring toFIG. 36, the insulation layer40and the copper-clad laminate plate60that define the inside hole are formed successively on the element non-mounting part B of the core board20. For example, the inside hole may be formed in the copper-clad laminate plate60by a drilling process, but is not limited to this process.

Referring toFIG. 37, as the insulation layer40and the copper-clad laminate plate60defining the inside hole are formed successively, a hole3is formed in the element non-mounting part B, and the cavity5for receiving an element is formed in the element mounting part A. The insulation layer40may be formed by a no-flow prepreg.

Referring toFIGS. 38 through 40, a sputter layer88is formed on the dry film resist layer9that is formed on the element mounting part A, and a via hole is formed in a portion of the insulation layer40that is exposed to the outside.

The plating layer140is formed on the inner wall of the hole3by a plating process, and the via77is formed in the via hole that is formed in the insulation layer40. For example, the sputter layer88, the via77, and the plating layer140may be formed of copper, which is generally used in this field of technology, but are not limited to this metal.

Referring toFIGS. 41 through 43, the inside of the hole3is filled with the plug ink160by plugging process, and then a grinding process is performed.

The first penetration via72is formed by performing cap plating on the surface of the element non-mounting part B.

The second circuit pattern232having the mounting pad278that is formed on the second surface of the core board20to be exposed to the outside is formed by performing a tenting process on the first and the second outer surfaces of the core board20. The sputter layer88that is formed on the surface of the element mounting part A is removed by the tenting process. By this process, the first penetration via72is connected to the second penetration via74that is formed inside of the core board20by the via77that is formed in the insulation layer40.

Referring toFIGS. 44 and 45, the first solder resist layer7and the second solder resist layer8are formed respectively on the element non-mounting part B and the second surface of the core board20. The solder resist layers7and8protect the circuit patterns including the mounting pad278and expose the circuit patterns to the outside as well.

The dry film resist layer9that is formed on the element mounting part A is removed.

Referring toFIG. 46, the metal protection layer289is formed on the surfaces of circuit patterns that are formed on the first and the second surfaces of the core board20and have mounting pads278that are exposed to the outside, so that manufacturing of the printed circuit board2000is completed.

The metal protection layer289may be referred to as UBM (Under Bump Metallurgy), and include at least one metal selected from nickel (Ni), gold (Au), and ally thereof. The metal protection layer289protects all circuit patterns including the mounting pads278that are exposed to the outside from a scratch, a corrosion, and a moisture.

FIGS. 47 through 49are a cross-sectional views of the first penetration via according to variations of the embodiment ofFIG. 1.

Referring toFIG. 47, in the printed circuit board1000, the ratio of region that fills the inside of the first penetration via71with the plug ink160is lowered, and the remaining region is plated. This is for resolving the occurrence of voids when filling with the plug ink160.

Referring toFIGS. 48 and 49, the inside of the first penetration via71is not filled with the plug ink160, a portion of the inside region is filled by plating, and the remaining region is filled with solder paste95. Then, a solder ball96is finally formed through reflow and deflux steps so that it becomes possible to bond directly to the main board without forming additional ball for bonding.

FIGS. 50 through 52are a cross-sectional views of the first penetration via according to variations of the embodiment ofFIG. 2.

The description ofFIGS. 50 through 52with regard to the first via72is similar to the description ofFIGS. 47 through 49with regard to the first via71. Accordingly, further description ofFIGS. 50-52will not be provided.

In the printed circuit boards1000and2000disclosed herein, the occurrence of warpage may be minimized by the insulation layers30and40that function as the bonding sheet, and by forming the copper-clad laminate plates50and60on the respective insulation layers30and40by a lamination process.

In addition, by forming the second penetration vias73and74that are formed inside of the respective core boards10and20and the first penetration vias71and72that are formed outside of the respective core boards10and20individually, and connecting the first and second penetration vias to each other by means of a micro via or a circuit pattern, a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board may be minimized and a low degree of freedom for designing a penetration via may be improved.

Method of Manufacturing the Package

FIG. 9is a flowchart showing an example method of manufacturing the package1100shown inFIG. 3.

Referring toFIGS. 3, 4, and 9, the method of manufacturing the package1100includes preparing a core board10that includes the element mounting part A and the element non-mounting part B on the first surface of the core board10(operation S301), forming the insulation layer30that defines an inside hole on the element non-mounting part B (operation S302), forming the copper-clad laminate plate50that further defines the inside hole on the insulation layer30(operation S303), forming the first penetration via71in the inside hole (operation S304), and disposing the first element300on the element mounting part A such that the first element300is electrically connected to the mounting pad178that is formed on the element mounting part A (operation S305). The first penetration via71is connected to the second penetration via73that is formed in the core board10.

The package1200shown inFIG. 4further includes the second element400that is formed on the second surface of the core board10such that the second element400is electrically connected to the mounting pad178that is formed on the second surface of the core board10.

The additional description of the process of manufacturing the packages1100and1200is the same as about the description of the method of manufacturing the printed circuit board1000, so the same description will not be repeated here.

FIG. 10is a flowchart showing an example method of manufacturing the package2200shown inFIG. 5.

Referring toFIGS. 5, 6, and 10, the method of manufacturing the package2200includes preparing the core board20that includes the element mounting part A and the element non-mounting part B on the first surface of the core board20(operation S401), forming the insulation layer40on the element non-mounting part B (operation S402), forming the copper-clad laminate plate60that defines an inside hole on the insulation layer40(operation S403), forming the first penetration via72in the inside hole (operation S404), and disposing the first element300on the element mounting part A such that the first element300is electrically connected to the mounting pad278that is formed on the element mounting part A (operation S405). The first penetration via72is connected to the second penetration via74that is formed in the core board20by the via77that is formed in the insulation layer40.

The package2300shown inFIG. 6further includes the second element400that formed on the second surface of the core board20such that the second element400is electrically connected to the mounting pad278that is formed on the second surface of the core board10.

The additional description of the process of manufacturing the packages2200and2300is the same as about the description of the method of manufacturing the printed circuit board2000, so the same description will not be repeated here.

In the packages1100,1200,2200and2300disclosed herein, the occurrence of warpage may be minimized. Additionally, by forming the second penetration vias that are formed inside of the core board and the first penetration vias that are formed outside of the core board individually and connecting the first and second penetration vias to each other by means of a micro via or a circuit pattern, a stress that may occur when forming a via that penetrates both the first and the second surfaces of the printed circuit board may be minimized and a low degree of freedom for designing a penetration via may be improved.