Patent Publication Number: US-10332849-B2

Title: Semiconductor package device and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of U.S. patent application Ser. No. 15/425,723, filed Feb. 6, 2017, the contents of which are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a semiconductor package device and a method of manufacturing the same, and more particularly, to a semiconductor package device including an antenna embedded therein and a method of manufacturing the same. 
     2. Description of the Related Art 
     Near Field Communication (NFC) is a short-distance, high-frequency wireless communication technology and includes contact-free radio frequency identification (RFID) and interconnection technologies. 
     The NFC technology can be applied to products such as a credit card, an identification (ID) card, a smart phone or a wireless charger. It would be desirable to improve communication quality and to reduce a total package size of an NFC device. 
     SUMMARY 
     In accordance with some embodiments of the present disclosure, a semiconductor package device includes: (1) a substrate having a first surface; (2) a permeable element including a first portion disposed on the first surface of the substrate, a second portion protruding from the first portion, and a third portion disposed on the second portion and contacting the second portion of the permeable element; (3) a first electrical element disposed on the substrate and surrounded by the second portion of the permeable element; and (4) a coil disposed on the substrate and surrounding the second portion of the permeable element. 
     In accordance with some embodiments of the present disclosure, a semiconductor package device includes: (1) a substrate having a first surface; (2) a permeable element including a first portion disposed on the first surface of the substrate, a second portion protruding from the first portion, and a third portion disposed on the second portion and contacting the second portion of the permeable element; and (3) a coil disposed between the first portion and the third portion of the permeable element. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a cross-sectional view of a semiconductor package device in accordance with some embodiments of the present disclosure. 
         FIG. 2  illustrates a cross-sectional view of a semiconductor package device in accordance with some embodiments of the present disclosure. 
         FIG. 3  illustrates a cross-sectional view of a semiconductor package device in accordance with some embodiments of the present disclosure. 
         FIG. 4  illustrates a cross-sectional view of a semiconductor package device in accordance with some embodiments of the present disclosure. 
         FIG. 5  illustrates a cross-sectional view of a semiconductor package device in accordance with some embodiments of the present disclosure. 
         FIG. 6A ,  FIG. 6B ,  FIG. 6C ,  FIG. 6D  and  FIG. 6E  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
         FIG. 7A ,  FIG. 7B ,  FIG. 7C  and  FIG. 7D  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
         FIG. 8A ,  FIG. 8B ,  FIG. 8C  and  FIG. 8D  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
     
    
    
     Common reference numerals are used throughout the drawings and the detailed description to indicate the same or similar components. The present disclosure will be more apparent from the following detailed description taken in conjunction with the accompanying drawings. 
     DETAILED DESCRIPTION 
     In some embodiments of this disclosure, for example, in some embodiments in which radio frequency identification (RFID) is used for Near Field Communications (NFC), an antenna structure is used for passive RFID, semi-passive RFID, or active RFID, each of which may benefit from improvements in communication quality and increased communication distance. Of these forms of RFID, in addition to challenges related to transmission through the antenna structure, passive RFID faces an additional challenge in that power to operate logic in a passive RFID device is received by way of an induced current from an associated antenna structure, and the received power should be sufficient to power the logic in the RFID device. Thus, in passive RFID devices, the antenna structure may be used both to receive a power transfer (e.g., the induced current) and to transmit information. Current may be induced in the antenna structure by passing the antenna through a magnetic field, such as a magnetic field generated by an RFID reader. The magnetic field is strongest closest to the source, and diminishes as a distance from the source increases. An improvement in the reception capability of the antenna structure may allow for an RFID device to receive sufficient power to operate the logic of the RFID device at an increased distance from a magnetic field source. Additionally, an improvement in the reception capability of the antenna may also improve the transmission capability of the antenna. Because of the additional challenges faced by passive RFID, some embodiments of the present disclosure are described as an antenna structure useful for improving a passive RFID device. However, one of ordinary skill in the art will understand that such an antenna structure will also be useful for improving other NFC devices, and indeed, non-NFC devices. 
       FIG. 1  illustrates a cross-sectional view of a semiconductor package device  1  in accordance with some embodiments of the present disclosure. The semiconductor package device  1  includes a substrate  10 , a package body  11 , a magnetically permeable element  12 , a coil  13 , electronic components  14   a ,  14   b  and an electrical connection  16 . 
     The substrate  10  may include, for example, a printed circuit board, such as a paper-based copper foil laminate, a composite copper foil laminate, or a polymer-impregnated glass-fiber-based copper foil laminate. The substrate  10  may include an interconnection structure, such as a redistribution layer (RDL) or a grounding element. In some embodiments, the grounding element is a via exposed from a lateral surface of the substrate  10 . In some embodiments, the grounding element is a metal layer exposed from the lateral surface of the substrate  10 . In some embodiments, the grounding element is a metal trace exposed from the lateral surface of the substrate  10 . In some embodiments, the substrate  10  includes a surface  101  and a surface  102  opposite to the surface  101 . The surface  101  of the substrate  10  is referred to as a bottom surface or a first surface and the surface  102  of the substrate  10  is referred to as a top surface or a second surface. 
     The electronic components  14   a ,  14   b  are disposed on the top surface  102  of the substrate  10 . The electronic component  14   a  may include a passive electronic component, such as a capacitor, a resistor or an inductor. The electronic component  14   b  may include an active electronic component, such as an integrated circuit (IC) chip or a die. Each electronic component  14   a ,  14   b  may be electrically connected to one or more of another electronic component (e.g., the other electronic component  14   a ,  14   b ) and to the substrate  10  (e.g., to the RDL), and electrical connection may be attained by way of flip-chip or wire-bond techniques. 
     The package body  11  is disposed on the bottom surface  101  of the substrate  10  and encapsulates the coil  13  and a portion of the magnetically permeable element  12 . In some embodiments, the package body  11  includes an epoxy resin including fillers dispersed therein. 
     The electrical connection  16  includes a first portion  16   a  and a second portion  16   b . The first portion  16   a  of the electrical connection  16  penetrates the package body  11  and is electrically connected to a conductive pad  10   p  on the bottom surface  101  of the substrate  10 . The second portion  16   b  of the electrical connection  16  is exposed from the package body  11  to be electrically connected to external devices. 
     The magnetically permeable element  12  includes three segments  12   a ,  12   b  and  12   c . The segment  12   a  is disposed on the bottom surface  101  of the substrate  10  and encapsulated by the package body  11 . The segment  12   c  is disposed on a surface  111  of the package body  11 . The segment  12   b  penetrates the package body  11  and connects the segment  12   a  with the segment  12   c . In some embodiments, a thickness of the segment  12   b  is the same as or larger than that of the segment  12   a . In some embodiments, the magnetically permeable element  12  may include a magnetic layer and a conductive layer which is electrically connected to a grounding pad on the bottom surface  101  of the substrate  10 . 
     The magnetically permeable element  12  is, or includes, a material with a high permeability and low magnetic saturation. The magnetically permeable element  12  can be, or can include, for example, Ferrite, such as, but not limited to, ferric oxide (Fe 2 O 3 ), zinc ferrite (ZnFe 2 O 4 ), manganese-zinc ferrite (Mn a Zn (1-a) Fe 2 O 4 ) or nickel-zinc ferrite (Ni a Zn (1-a) Fe 2 O 4 ), Ferroalloy, such as, but not limited to, ferrosilicon (FeSi), ferro silicon manganese (FeSiMg), iron phosphide (FeP) or iron-nickel (FeNi), magnetic adhesive or other magnetically permeable metal or metal alloy (e.g., another nickel-containing or iron-containing material), or a combination thereof. One measure of magnetic permeability of a material is in terms of its relative permeability with respect to a permeability of free space. Examples of suitable magnetically permeable materials for the magnetically permeable element  12  include those having a relative permeability greater than about 1, such as at least about 2, at least about 5, at least about 10, at least about 50, at least about 100, at least about 500, at least about 1000, at least about 5000, at least about 10 4 , at least about 10 5 , or at least about 10 6 . Magnetic permeability of a material can be measured at room temperature and at a particular field strength, such as about 0.5 Tesla or about 0.002 Tesla. In some embodiments, the permeability of the magnetically permeable element  12  is in a range from about 500 henry per meter (H/m) to about 3000 H/m. 
     The coil  13  is disposed within the package body  11  and encapsulated by the package body  11 . The coil  13  surrounds the segment  12   b  of the magnetically permeable element  12 . In some embodiments, an inner diameter D 3  of the coil  13  is greater than a width D 1  of the segment  12   c  of the magnetically permeable element  12  and less than a width D 2  of the segment  12   a  of the magnetically permeable element  12 . For example, a projection of the segment  12   c  of the magnetically permeable element  12  on the bottom surface  101  of the substrate  10  (e.g., a vertical projection extending from the segment  12   c  to the bottom surface  101  of the substrate  10 ) and a projection of the coil  13  on the bottom surface  101  of the substrate  10  (e.g., a vertical projection extending from the coil  13  to the bottom surface  101  of the substrate  10 ) do not overlap. In addition, a projection of the segment  12   a  of the magnetically permeable element  12  on the bottom surface  101  of the substrate  10  (e.g., a vertical projection extending from the segment  12   a  to the bottom surface  101  of the substrate  10 ) overlaps a projection of the coil  13  on the bottom surface  101  of the substrate  10  (e.g., a vertical projection extending from the coil  13  to the bottom surface  101  of the substrate  10 ). 
     The coil  13  is, or includes, a conductive material such as a metal or metal alloy. Examples include gold (Au), silver (Ag), aluminum (Al), copper (Cu), or an alloy thereof. The coil  13  can be magnetically coupled to a magnetic field to induce a current within the coil  13 . In some embodiments, the induced current is provided to the electronic components  14   a ,  14   b  through a conductive line  13   c  and the interconnection structure (e.g., the RDL) within the substrate  10 , so as to power the electronic components  14   a ,  14   b  or other electronic components external to the semiconductor package device  1 . Thus, the coil  13  performs as a wireless receiver (e.g., a charging coil). 
     In comparable wireless charging devices, the coil is an individual element separated from other electronic components, which would increase the total size and manufacturing costs of the wireless charging devices. By integrating a wireless charging coil into the semiconductor package device  1  as shown in  FIG. 1 , the total size and manufacturing costs can be reduced. In addition, since the width D 2  of the segment  12   a  of the magnetically permeable element  12  is greater than the inner diameter D 3  of the coil  13 , the segment  12   a  can reduce the likelihood of (e.g., prevent) the electronic components  14   a ,  14   b  on the top surface  102  of the substrate  10  from being interfered with by undesired magnetic fields passing through the coil  13 . Furthermore, the segment  12   c  of the magnetically permeable element  12  is used to aggregate the magnetic field to increase the efficiency for generating induced current. The magnetically permeable element  12  is also beneficial for heat dissipation of the semiconductor package device  1 . 
       FIG. 2  illustrates a cross-sectional view of a semiconductor package device  2  in accordance with some embodiments of the present disclosure. The semiconductor package device  2  is similar to the semiconductor package device  1  in  FIG. 1 , except that the semiconductor package device  2  further includes a second package body  25  disposed on a top surface  202  of a substrate  20 . The semiconductor package device  1  includes the substrate  20  (e.g., similar to the substrate  10 ), a first package body  21  (e.g., similar to the package body  11 ), a magnetically permeable element  22  (e.g., similar to the magnetically permeable element  12 ), a coil  23  (e.g., similar to the coil  13 ), electronic components  24   a  and  24   b  (e.g., similar to electronic components  14   a ,  14   b , respectively), and the second package body  25 . 
     The second package body  25  is disposed on the top surface  202  of the substrate  20  to cover the electronic components  24   a ,  24   b . In some embodiments, the second package body  25  includes an epoxy resin including fillers dispersed therein. 
     The electrical connection  26  includes a first portion  26   a  and a second portion  26   b . The first portion  26   a  of the electrical connection  26  penetrates the second package body  25  and is electrically connected to a conductive pad  20   p  on the top surface  202  of the substrate  20 . The second portion  26   b  of the electrical connection  26  is exposed from the second package body  25  to be electrically connected to external devices. 
       FIG. 3  illustrates a cross-sectional view of a semiconductor package device  3  in accordance with some embodiments of the present disclosure. The semiconductor package device  3  includes a substrate  30 , a package body  31 , a magnetically permeable element  32 , a coil  33 , electronic components  34   a ,  34   b ,  34   c ,  34   d  and an electrical connection  36 . 
     The substrate  30  may include, for example, a printed circuit board, such as a paper-based copper foil laminate, a composite copper foil laminate, or a polymer-impregnated glass-fiber-based copper foil laminate. The substrate  30  may include an interconnection structure, such as an RDL or a grounding element. In some embodiments, the grounding element is a via exposed from a lateral surface of the substrate  30 . In some embodiments, the grounding element is a metal layer exposed from the lateral surface of the substrate  30 . In some embodiments, the grounding element is a metal trace exposed from the lateral surface of the substrate  30 . In some embodiments, the substrate includes a surface  301  and a surface  302  opposite to the surface  301 . The surface  301  of the substrate  30  is referred to as a bottom surface or a first surface and the surface  302  of the substrate  30  is referred to as a top surface or a second surface. 
     The electronic components  34   a ,  34   b  are disposed on the top surface  302  of the substrate  30 . The electronic components  34   c ,  34   d  are disposed on the bottom surface  301  of the substrate  30 . In some embodiments, each electronic component  34   a ,  34   b ,  34   c ,  34   d  may include a passive electronic component, such as a capacitor, a resistor or an inductor. In other embodiments, each electronic component  34   a ,  34   b ,  34   c ,  34   d  may include an active electronic component, such as an IC chip or a die. Each electronic component  34   a ,  34   b ,  34   c ,  34   d  may be electrically connected to one or more of another electronic component (e.g., one or more of the electronic components  34   a ,  34   b ,  34   c ,  34   d ) and to the substrate  30  (e.g., to the RDL), and electrical connection may be attained by way of flip-chip or wire-bond techniques. 
     The package body  31  is disposed on the bottom surface  301  of the substrate  30  and encapsulates the electronic components  34   c ,  34   d , the coil  33  and a portion of the magnetically permeable element  32 . In some embodiments, the package body  31  includes an epoxy resin including fillers dispersed therein. 
     The electrical connection  36  includes a first portion  36   a  and a second portion  36   b . The first portion  36   a  of the electrical connection  36  penetrates the package body  31  and is electrically connected to a conductive pad  30   p  on the bottom surface  301  of the substrate  30 . The second portion  36   b  of the electrical connection  36  is exposed from the package body  31  to be electrically connected to external devices. 
     The magnetically permeable element  32  includes five segments  32   a ,  32   b ,  32   c ,  32   d  and  32   e . The segments  32   a  and  32   d  are disposed on the bottom surface  301  of the substrate  30  and encapsulated by the package body  31 . The segment  32   c  is disposed on a surface  311  of the package body  31 . The segment  32   b  penetrates the package body  31  and connects the segment  32   a  with the segment  32   c . The segment  32   e  penetrates the package body  31  and connects the segment  32   d  with the segment  32   c . In some embodiments, a thickness of the segments  32   b ,  32   e  is the same as or larger than those of the segments  32   a ,  32   d . In some embodiments, the magnetically permeable element  32  may include a magnetic layer and a conductive layer which is electrically connected to a grounding pad on the bottom surface  301  of the substrate  30 . The segments  32   b ,  32   c  and  32   e  cover the electronic components  34   c ,  34   d  to reduce the likelihood of (e.g., prevent) the electronic components  34   c ,  34   d  from being interfered with by undesired magnetic fields. 
     The magnetically permeable element  32  is, or includes, a material with a high permeability and low magnetic saturation. The magnetically permeable element  32  can be, or can include, for example, Ferrite (e.g., Fe 2 O 3 , ZnFe 2 O 4 , Mn a Zn (1-a) Fe 2 O 4  or Ni a Zn (1-a) Fe 2 O 4 ), Ferroalloy (e.g., FeSi, FeSiMg, FeP or FeNi), magnetic adhesive or other magnetically permeable metal or metal alloy (e.g., another nickel-containing or iron-containing material), or a combination thereof. One measure of magnetic permeability of a material is in terms of its relative permeability with respect to a permeability of free space. Examples of suitable magnetically permeable materials for the magnetically permeable element  32  include those having a relative permeability greater than about 1, such as at least about 2, at least about 5, at least about 10, at least about 50, at least about 100, at least about 500, at least about 1000, at least about 5000, at least about 10 4 , at least about 10 5 , or at least about 10 6 . Magnetic permeability of a material can be measured at room temperature and at a particular field strength, such as about 0.5 Tesla or about 0.002 Tesla. In some embodiments, the permeability of the magnetically permeable element  32  is in a range from about 500 H/m to about 3000 H/m. 
     The coil  33  is disposed within the package body  31  and encapsulated by the package body  31 . The coil  33  surrounds the segments  32   b ,  32   e  of the magnetically permeable element  32 . In some embodiments, an inner diameter D 4  of the coil  33  is greater than a width D 5  of the segment  32   c  of the magnetically permeable element  32 . For example, a projection of the segment  32   c  of the magnetically permeable element  32  on the bottom surface  301  of the substrate  30  (e.g., a vertical projection extending from the segment  32   c  to the bottom surface  301  of the substrate  30 ) and a projection of the coil  33  on the bottom surface  301  of the substrate  30  (e.g., a vertical projection extending from the coil  33  to the bottom surface  301  of the substrate  30 ) do not overlap. In addition, a projection of the segments  32   a ,  32   d  of the magnetically permeable element  32  on the bottom surface  301  of the substrate  30  (e.g., a vertical projection extending from the segments  32   a ,  32   d  to the bottom surface  301  of the substrate  30 ) overlaps a projection of the coil  33  on the bottom surface  301  of the substrate  30  (e.g., a vertical projection extending from the coil  33  to the bottom surface  301  of the substrate  30 ). 
     The coil  33  is, or includes, a conductive material such as a metal or metal alloy. Examples include Au, Ag, Al, Cu, or an alloy thereof. The coil  33  can be magnetically coupled to a magnetic field to induce a current within the coil  33 . In some embodiments, the induced current is provided to the electronic components  34   a ,  34   b ,  34   c ,  34   d  through a conductive line  33   c  and the interconnection structure (e.g., the RDL) within the substrate  30 , so as to power the electronic components  34   a ,  34   b ,  34   c ,  34   d  or other electronic components external to the semiconductor package device  3 . Thus, the coil  33  performs as a wireless receiver (e.g., a charging coil). 
     In comparison with the semiconductor package device  1  in  FIG. 1 , the semiconductor package device  3  could accommodate more electronic components, which would reduce the total size of the semiconductor package device  3 . 
       FIG. 4  illustrates a cross-sectional view of a semiconductor package device  4  in accordance with some embodiments of the present disclosure. The semiconductor package device  4  is similar to the semiconductor package device  3  in  FIG. 3 , except that the semiconductor package device  4  further includes a second package body  45  disposed on a top surface  402  of a substrate  40 . The semiconductor package device  4  includes the substrate  40  (e.g., similar to the substrate  30 ), a first package body  41  (e.g., similar to the package body  31 ), a magnetically permeable element  42  (e.g., similar to the magnetically permeable element  32 ), a coil  43  (e.g., similar to the coil  33 ), electronic components  44   a ,  44   b ,  44   c ,  44   d  (e.g., similar to electronic components  34   a ,  34   b ,  34   c ,  34   d , respectively), and the second package body  45 . 
     The second package body  45  is disposed on the top surface  402  of the substrate  40  to cover the electronic components  44   a ,  44   b . In some embodiments, the second package body  45  includes an epoxy resin including fillers dispersed therein. 
     The electrical connection  46  includes a first portion  46   a  and a second portion  46   b . The first portion  46   a  of the electrical connection  46  penetrates the second package body  45  and is electrically connected to a conductive pad  40   p  on the top surface  402  of the substrate  40 . The second portion  46   b  of the electrical connection  46  is exposed from the second package body  45  to be electrically connected to external devices. 
       FIG. 5  illustrates a cross-sectional view of a semiconductor package device  5  in accordance with some embodiments of the present disclosure. The semiconductor package device  5  is similar to the semiconductor package device  3  in  FIG. 3 , except that the semiconductor package device  5  further includes a connector  56  and an opening  52   g  formed on a magnetically permeable element  52 . The semiconductor package device  5  includes a substrate  50  (e.g., similar to the substrate  30 ), a first package body  51  (e.g., similar to the package body  31 ), a second package body  55  (e.g., similar to the second package body  45 ), the magnetically permeable element  52 , a coil  53  (e.g., similar to the coil  33 ), and electronic components  54   a ,  54   b ,  54   c ,  54   d  (e.g., similar to electronic components  34   a ,  34   b ,  34   c ,  34   d , respectively). 
     The connector  56  is disposed on the top surface  502  of the substrate  50  and is exposed from the second package body  55 . The connector  56  may include a plurality of pins to provide electrical connections between the electronic components  54   a ,  54   b ,  54   c ,  54   d  and external circuits. 
     A segment  52   c   1  and a segment  52   c   2  of the magnetically permeable element  52  are disposed on a surface  511  of the first package body  51 . The segment  52   c   1  is connected with a segment  52   a  of the magnetically permeable element  52  through a segment  52   b  of the magnetically permeable element  52 . The segment  52   c   2  is connected with a segment  52   d  of the magnetically permeable element  52  through a segment  52   e  of the magnetically permeable element  52 . The segment  52   c   1  and the segment  52   c   2  are physically separated from each other by the opening  52   g . The opening  52   g  is used to facilitate the formation of the first package body  51  because the molding compound can be easily injected into the space defined by the segments  52   b ,  52   c   1 ,  52   c   2 ,  52   e  to encapsulate the electronic components  54   c ,  54   d  through the opening  52   g.    
       FIGS. 6A, 6B, 6C, 6D and 6E  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
     Referring to  FIG. 6A , a substrate  60  is provided. The substrate  60  may include, for example, a printed circuit board, such as a paper-based copper foil laminate, a composite copper foil laminate, or a polymer-impregnated glass-fiber-based copper foil laminate. A magnetically permeable layer  62   a  is formed on the substrate  60 . The magnetically permeable layer  62   a  may be formed by attaching a Ferrite sheet, sputtering or platting Ferroalloy, coating or filling magnetic adhesive or by other suitable processes. In some embodiments, an adhesive layer can be formed on the substrate  60  prior to the formation of the magnetically permeable layer  62   a.    
     Referring to  FIG. 6B , a coil  63  is formed on the magnetically permeable layer  62   a . In other words, the coil  63  overlaps the magnetically permeable layer  62   a.    
     Referring to  FIG. 6C , a package body  61  is formed on the substrate  60  to cover the coil  63  and the magnetically permeable layer  62   a . In some embodiments, the package body  61  includes an epoxy resin including fillers dispersed therein. An opening  61   h  is then formed to penetrate the package body  61  to expose the magnetically permeable layer  62   a . In some embodiments, the opening  61   h  can be formed by drilling, laser drilling or etching. 
     Referring to  FIG. 6D , a magnetically permeable layer  62   b  is formed to fill the opening  61   h . In some embodiments, the magnetically permeable layer  62   b  and the magnetically permeable layer  62   a  are formed of the same material. Alternatively, they can include different materials. In some embodiments, a thickness of the magnetically permeable layer  62   b  is the same as or larger than that of the magnetically permeable layer  62   a.    
     Referring to  FIG. 6E , a magnetically permeable layer  62   c  is formed on the package body  61  to contact the magnetically permeable layer  62   b . The magnetically permeable layer  62   c  and the coil  63  do not overlap. In some embodiments, the magnetically permeable layer  62   c  and the magnetically permeable layer  62   b  are formed of the same material. Alternatively, they can include different materials. After forming the magnetically permeable layer  62   c , electronic components may be formed on an opposite surface of the substrate  60  to form the semiconductor package device  1  as shown in  FIG. 1 . In some embodiments, an adhesive layer can be formed on the package body  61  prior to the formation of the magnetically permeable layer  62   c.    
     In some embodiments, forming the magnetically permeable layer  62   c  may further include the following operations: (i) forming a protective layer (e.g., a mask or stencil) on the package body  61  and above the coil  63 ; (ii) forming the magnetically permeable layer  62   c  on a portion of the package body  61  that is not covered by the protective layer; and (iii) removing the protective layer. In some embodiments, the operation of forming the magnetically permeable layer  62   c  is the same as that of forming the magnetically permeable layer  62   a . Alternatively, they can be formed by different operations. 
       FIGS. 7A, 7B, 7C and 7D  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
     Referring to  FIG. 7A , a substrate  70  is provided. The substrate  70  may include, for example, a printed circuit board, such as a paper-based copper foil laminate, a composite copper foil laminate, or a polymer-impregnated glass-fiber-based copper foil laminate. A magnetically permeable layer  72   a  is formed on the substrate  70 . The magnetically permeable layer  72   a  may be formed by attaching a Ferrite sheet, sputtering or platting Ferroalloy, coating or filling magnetic adhesive or by other suitable processes. 
     Referring to  FIG. 7B , a package body  71  is formed on the substrate  70  to cover the magnetically permeable layer  72   a . An opening  71   h   1  is formed to penetrate the package body  71  to expose the magnetically permeable layer  72   a . A plurality of openings  71   h   2  are formed to penetrate the package body  71  without exposing the magnetically permeable layer  72   a . At least one opening  71   h   3  is formed to penetrate the package body  71  to expose a conductive pad  70   p  on the substrate  70 . In some embodiments, the openings  71   h   1 ,  71   h   2  and  71   h   3  can be formed by drilling, laser drilling or etching. 
     Referring to  FIG. 7C , a magnetically permeable layer  72   b  is formed to fill the opening  71   h   1 . In some embodiments, the magnetically permeable layer  72   b  and the magnetically permeable layer  72   a  are formed of the same material. Alternatively, they can include different materials. In some embodiments, a thickness of the magnetically permeable layer  72   b  is the same as or larger than that of the magnetically permeable layer  72   a.    
     A conductive material is formed within the openings  71   h   2  and  71   h   3  to form a coil  73  and the conductive line  73   c  connecting the coil  73  with the conductive pad  70   p  of the substrate  70 . The coil  73  overlaps the magnetically permeable layer  72   a.    
     Referring to  FIG. 7D , a magnetically permeable layer  72   c  is formed on the package body  71  to contact the magnetically permeable layer  72   b . The magnetically permeable layer  72   c  and the coil  73  do not overlap. In some embodiments, the magnetically permeable layer  72   c  and the magnetically permeable layer  72   b  are formed of the same material. Alternatively, they can include different materials. After forming the magnetically permeable layer  72   c , electronic components may be formed on an opposite surface of the substrate  70  to form the semiconductor package device  1  as shown in  FIG. 1 . In some embodiments, forming the magnetically permeable layer  72   c  may further include the following operations: (i) forming a protective layer (e.g., a mask or stencil) on the package body  71  to cover the coil  73 ; (ii) forming the magnetically permeable layer  72   c  on a portion of the package body  71  that is not covered by the protective layer; and (iii) removing the protective layer. In some embodiments, the operation of forming the magnetically permeable layer  72   c  is the same as that of forming the magnetically permeable layer  72   a . Alternatively, they can be formed by different operations. After forming the magnetically permeable layer  72   c , electronic components may be formed on an opposite surface of the substrate  70  to form the semiconductor package device  1  as shown in  FIG. 1 . 
       FIGS. 8A, 8B, 8C and 8D  illustrate a semiconductor manufacturing method in accordance with some embodiments of the present disclosure. 
     Referring to  FIG. 8A , a substrate  80  is provided. The substrate  80  may include, for example, a printed circuit board, such as a paper-based copper foil laminate, a composite copper foil laminate, or a polymer-impregnated glass-fiber-based copper foil laminate. A magnetically permeable layer  82   a  is formed on a portion of the substrate  80 . The magnetically permeable layer  82   a  may be formed by attaching a Ferrite sheet, sputtering or platting Ferroalloy, coating or filling magnetic adhesive or by other suitable processes. 
     A coil  83  is formed on the magnetically permeable layer  82   a . The coil  83  is electrically connected with a conductive pad  80   p  on the substrate  80  through a conductive line  83   c.    
     Electronic components  84   a ,  84   b  are formed on a surface of the substrate  80  that is not covered by the magnetically permeable layer  82   a . The electronic component  84   a  may include a passive electronic component, such as a capacitor, a resistor or an inductor. The electronic component  84   b  may include an active electronic component, such as an IC chip or a die. The electronic components  84   a ,  84   b  may be connected to the substrate  80  by flip-chip or wire-bond techniques. 
     Referring to  FIG. 8B , a package body  81  is formed on the substrate  80  to cover the magnetically permeable layer  82   a . Openings  81   h   1  and  81   h   2  are formed to penetrate the package body  81  to expose the magnetically permeable layer  82   a . In some embodiments, the openings  81   h   1  and  81   h   2  can be formed by drilling, laser drilling or etching. 
     Referring to  FIG. 8C , a magnetically permeable layer  82   b   1  is formed to fill the opening  81   h   1  and a magnetically permeable layer  82   b   2  is formed to fill the opening  81   h   2 . In some embodiments, the magnetically permeable layers  82   b   1 ,  82   b   2  and the magnetically permeable layer  82   a  are formed of the same material. Alternatively, they can include different materials. In some embodiments, a thickness of the magnetically permeable layers  82   b   1 ,  82   b   2  is the same as or larger than that of the magnetically permeable layer  82   a.    
     Referring to  FIG. 8D , a magnetically permeable layer  82   c  is formed on the package body  81  to contact the magnetically permeable layers  82   b   1  and  82   b   2 . The magnetically permeable layer  82   c  and the coil  83  do not overlap. In some embodiments, the magnetically permeable layer  82   c  and the magnetically permeable layers  82   b   1 ,  82   b   2  are formed of the same material. Alternatively, they can include different materials. After forming the magnetically permeable layer  82   c , electronic components may be formed on an opposite surface of the substrate  80  to form the semiconductor package device  3  as shown in  FIG. 3 . In some embodiments, forming the magnetically permeable layer  82   c  may further include the following operations: (i) forming a protective layer (e.g., a mask or stencil) on the package body  81  and above the coil  83 ; (ii) forming the magnetically permeable layer  82   c  on a portion of the package body  81  that is not covered by the protective layer; and (iii) removing the protective layer. In some embodiments, the operation of forming the magnetically permeable layer  82   c  is the same as that of forming the magnetically permeable layer  82   a . Alternatively, they can be formed by different operations. 
     As used herein, the terms “substantially,” “substantial,” “approximately,” and “about” are used to denote and account for small variations. For example, when used in conjunction with a numerical value, the terms can refer to a range of variation of less than or equal to ±10% of that numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. As another example, a thickness of a film or a layer being “substantially uniform” can refer to a standard deviation of less than or equal to ±10% of an average thickness of the film or the layer, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. The term “substantially coplanar” can refer to two surfaces within micrometers (μm) of lying along a same plane, such as within 40 μm, within 30 μm, within 20 μm, within 10 μm, or within 1 μm of lying along the same plane. Two surfaces or components can be deemed to be “substantially perpendicular” if an angle therebetween is, for example, 90°±10°, such as ±5°, ±4°, ±3°, ±2°, ±1°, ±0.5°, ±0.1°, or ±0.05°. When used in conjunction with an event or circumstance, the terms “substantially,” “substantial,” “approximately,” and “about” can refer to instances in which the event or circumstance occurs precisely, as well as instances in which the event or circumstance occurs to a close approximation. 
     In the description of some embodiments, a component provided “on” another component can encompass cases where the former component is directly on (e.g., in physical contact with) the latter component, as well as cases where one or more intervening components are located between the former component and the latter component. 
     Additionally, amounts, ratios, and other numerical values are sometimes presented herein in a range format. It can be understood that such range formats are used for convenience and brevity, and should be understood flexibly to include not only numerical values explicitly specified as limits of a range, but also all individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly specified. 
     While the present disclosure has been described and illustrated with reference to specific embodiments thereof, these descriptions and illustrations do not limit the present disclosure. It can be clearly understood by those skilled in the art that various changes may be made, and equivalent elements may be substituted within the embodiments without departing from the true spirit and scope of the present disclosure as defined by the appended claims. The illustrations may not necessarily be drawn to scale. There may be distinctions between the artistic renditions in the present disclosure and the actual apparatus, due to variables in manufacturing processes and such. There may be other embodiments of the present disclosure which are not specifically illustrated. The specification and drawings are to be regarded as illustrative rather than restrictive. Modifications may be made to adapt a particular situation, material, composition of matter, method, or process to the objective, spirit and scope of the present disclosure. All such modifications are intended to be within the scope of the claims appended hereto. While the methods disclosed herein have been described with reference to particular operations performed in a particular order, it can be understood that these operations may be combined, sub-divided, or re-ordered to form an equivalent method without departing from the teachings of the present disclosure. Therefore, unless specifically indicated herein, the order and grouping of the operations are not limitations of the present disclosure.