Patent Abstract:
An image sensor package, a method of manufacturing the same, and an image sensor module including the image sensor package are provided. In the image sensor package, an image sensor chip is installed onto a depression of a transmissive substrate. An adhesive bonds the image sensor chip to the transmissive substrate and seals an Active Pixel Sensor (APS) on the image sensor chip, protecting it from fine particle contamination. An IR cutting film is disposed on the transmissive substrate to minimize the height of the image sensor package. The image sensor package is electrically connected to external connection pads in the depression. Consequently, the image sensor package has a minimum height, is not susceptible to particle contamination, and does not require expensive alignment processes during manufacturing.

Full Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATION 
       [0001]    This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2006-0072660, filed on Aug. 1, 2006, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to an image sensor package, a method of manufacturing the same, and an image sensor module including the image sensor package, and more particularly, to an image sensor package which prevents itself from being contaminated by fine particles and can be made slimmer, a method of manufacturing the same, and an image sensor module including the image sensor package 
         [0004]    2. Description of the Related Art 
         [0005]    Optical electric devices such as semiconductor image sensors (for example, CMOS image sensors) are generally packaged so that they can be connected to high level packages such as large circuit assemblies. Image sensor packages serve several functions including facilitating electrical connection to large circuit assemblies, protecting an image sensor chip from the surrounding environment, and making light or another type of radiation pass through a sensing circuit disposed in the image sensor chip. 
         [0006]    As the semiconductor industry grows, manufacturing companies are developing various packaging methods for manufacturing smaller and more reliable semiconductor components. In particular, in a market where miniaturization and slimness are required such as camera phones, Chip On Board (COB), Chip On Film (COF), Chip Size Package (CSP), and similar technologies are widely used. 
         [0007]      FIG. 1  is a cross-sectional diagram of an image sensor module packaged by a conventional Chip On Board (COB) method. The COB formed image sensor module illustrated in  FIG. 1  includes an image sensor chip  10 , a PCB  20  on which the image sensor chip  10  is mounted, a lens unit  30  disposed on the PCB  20  on which the image sensor chip  10  is installed, and a Flexible Printed Circuit (FPC)  40  through which the PCB  20  is connected. The lens unit  30  consists of a lens  32 , an infrared ray blocking film  36 , and a housing  34 , wherein the lens  32  concentrates light into an Active Pixel Sensor (APS)  12  of the image sensor chip  10  and the infrared ray blocking film  36  blocks infrared rays from light that is incident to the image sensor chip  10 . 
         [0008]    In the COB formed image sensor module of  FIG. 1 , the PCB  20  and the rear surface of the image sensor chip  10  are adhered using a die adhesive  22  and then input/output electrodes of the image sensor chip  10  are connected with the electrode of the PCB  20  using a bonding wire  24 . Since this method is similar to a semiconductor manufacturing process, productivity improves. However, as a space for wire bonding is needed, the size of the image sensor module increases, and as the height of the bonding wire  24  and the space for the infrared ray blocking film  36  are increased, the height of the image sensor module also increases. 
         [0009]      FIG. 2  is a cross-sectional diagram of an image sensor module packaged by a conventional Chip On Film (COF) method. In the COF image sensor module illustrated in  FIG. 2 , the image sensor chip  10  is bonded to a flexible PCB or a flexible printed circuit (FPC)  42  using an Anisotropic Conductive Film (ACF)  23 . In this case, bonding wires are not used so as to reduce the width and height of a lens unit  31  and thus a miniaturized and slim image sensor module can be manufactured. However, in order to transmit light to the APS  12  of the image sensor chip  10 , a hole at least as wide as the width of the APS  12  should be bored in the flexible PCB or the FPC  42 . In this case, the image sensor chin  10  may be contaminated by fine particles originating from the cut part of the FPC  42 . In addition, an alignment of the bored flexible PCB or the FPC  42 , the image sensor chip  10 , and the ACF  23  may be difficult. 
         [0010]    As described above, conventional methods of packaging image sensor chips suffer from several drawbacks including large package height, fine particle contamination, and difficult alignment during manufacturing. The present invention addresses these and other disadvantages of the conventional methods. 
       SUMMARY 
       [0011]    The present invention provides a miniaturized and slim image sensor package having reduced susceptibility to contamination by fine particles. The present invention also provides a method of manufacturing the miniaturized and slim image sensor package having reduced susceptibility to contamination by fine particles. The present invention further provides a miniaturized and slim image sensor module using the image sensor package. 
         [0012]    According to an aspect of the present invention, there is provided an image sensor package including: a transmissive substrate, the transmissive substrate comprising a depression disposed at the center of the transmissive substrate and a plurality of recesses connecting with the depression disposed along a circumference of the depression; a plurality of external connection pads in which one end of each of the external connection pads is disposed on the transmissive substrate in the depression and the other end of each of the external connection pads is disposed to extend to the edge of the transmissive substrate along the upper surface of the transmissive substrate projected between the recess; and an image sensor chip on which an Active Pixel Sensor (APS) is disposed to face the depression and a plurality of interconnection pads electrically connecting with the external connection pads are disposed around the APS. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: 
           [0014]      FIG. 1  is a cross-sectional diagram of an image sensor module packaged by a conventional Chip On Board (COB) method; 
           [0015]      FIG. 2  is a cross-sectional diagram of an image sensor module packaged by a conventional Chip On Film (COF) method; 
           [0016]      FIG. 3A through 3C  are plan view and cross-sectional views schematically illustrating an image sensor package according to an embodiment of the present invention; 
           [0017]      FIG. 4  is a cross-sectional diagram of an image sensor module according to an embodiment of the present invention; 
           [0018]      FIG. 5  is a cross-sectional diagram of an image sensor module according to another embodiment of the present invention; 
           [0019]      FIG. 6A through 6G  are cross-sectional diagrams illustrating a method of manufacturing the image sensor package of  FIGS. 3A through 3C  according to an embodiment of the present invention; and 
           [0020]      FIG. 7  is a cross-sectional diagram of an image sensor package manufactured using an ultrasonic bonding method. 
       
    
    
     DETAILED DESCRIPTION 
       [0021]    Hereinafter, the present invention will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, like reference numerals denote like elements, and the sizes and thicknesses of layers and regions are exaggerated for clarity. 
         [0022]      FIG. 3A  is a plan view of an image sensor package  100  according to an embodiment of the present invention and  FIGS. 3B and 3C  are cross-sectional views of the image sensor package  100  of  FIG. 3A  taken along line I-I′ and line II-II′, respectively. In  FIG. 3A , an adhesive is not illustrated in order to show the structure of the image sensor package  100  more clearly.  FIG. 3B  illustrates a transmissive substrate  120  of the image sensor package  100  in which light enters, wherein a bottom surface of the transmissive substrate  120  is illustrated at the top. In  FIG. 3C , the image sensor package  100  of  FIG. 3B  is turned upside down. Also, an image sensor chip  110  disposed in the transmissive substrate  120  is not illustrated in  FIG. 3C . 
         [0023]    In the image sensor package  100  illustrated in  FIGS. 3A through 3C , the image sensor chip  110  is included in a depression  125  of the transmissive substrate  120  using a flip-chip method. In this case, an Active Pixel Sensor (APS)  112  of the image sensor chip  110  is disposed to face the bottom of the depression  125  of the transmissive substrate  120 . An IR cutting film  121  is coated on the opposite surface from the depression  125  of the transmissive substrate  120 . Therefore, light entering through the bottom of the depression  125  of the transmissive substrate  120  may be incident onto the APS  112  of the image sensor chip  110 , while infrared rays are blocked by the IR cutting film  121 . The APS  112  is disposed approximately at the center of the image sensor chip  110 , and an interconnection pad  113  is disposed approximately at the outer circumference of the APS  112 . The interconnection pad  113  of the image sensor chip  110  is connected with a chip connection unit  122   a  of an external connection pad  122  in the transmissive substrate  120 , and the chip connection unit  122   a  of the external connection pad  122  is extended to a circuit board connection unit  122   b  disposed at an upper portion of the side wall of the depression  125 . In  FIG. 3A , an inclination of the side wall of the depression  125  is not illustrated in order to simplify the drawing. However, as illustrated in  FIG. 3B , the side wall of the depression  125  may be inclined so as to easily form the external connection pad  122 . 
         [0024]    In the image sensor package  100 , the depth of the depression  125  in the transmissive substrate  120  is larger than the height of the image sensor chip  110  and thus the image sensor chip  110  may be substantially completely inserted into the depression  125  in the transmissive substrate  120 , thereby reducing the width and height of the image sensor package  100 . In addition, as the image sensor chip  110  is sealed in the depression  125  in the transmissive substrate  120  using an adhesive  116 , contamination of the image sensor package  100  by fine particles during a manufacturing process of a semiconductor imaging device module can be prevented. 
         [0025]    In the current embodiment of the present invention, a recess unit  126  is formed on the side wall of the depression  125  in the transmissive substrate  120  wherein the recess unit  126  is interposed between the circuit board connection units  122   b  as illustrated in  FIGS. 3A through 3C . Accordingly, the side wall of the transmissive substrate  120  has a glass post structure in which the circuit board connection unit  122   b  is disposed on a post defined by the recess unit  126 . Therefore, the circuit board connection units  122   b  may be substantially completely separated by the recess unit  126  and thus a short circuit can be prevented between the adjacent circuit board connection units  122   b . The depth of the recess unit  126  may be the same as or different to the depth of the depression  125 . If the depth of the recess unit  126  is different from the depth of the depression  125 , the depth of the recess unit  126  may be less than the depth of the depression  125 . In addition, the transmissive substrate  120  can be used even if no recess unit  126  is formed on the side wall of the depression  125 . 
         [0026]    The image sensor chip  110  is bonded to the transmissive substrate  120 , for example, using the adhesive  116 . The adhesive  116  seals the space between the APS  112  of the image sensor chip  110  and the transmissive substrate  120  from the outside of the interconnection pad  113 . Accordingly, the APS  112  is not exposed to the outside of the image sensor package  100  and thus a possibility of contamination can be reduced. In order to bond the image sensor chip  110  to the transmissive substrate  120 , the adhesive  116  such as an epoxy film or a dam material may be used. When the adhesive  116  is heated while bonding, outgassing materials may be generated by the adhesive  116 . The outgassing materials may contaminate the APS  112  of the image sensor chip  110  if not vented. A groove for outgassing materials emission  127  is formed on the transmissive substrate  120 , wherein the groove for outgassing materials emission  127  is extended from the bottom of the depression  125  in the lower part of the adhesive  116  to the recess unit  126 , and thus the outgassing materials generated by the adhesive  116  during bonding are moved along the groove for outgassing materials emission  127  and then emitted through the recess unit  126 . 
         [0027]      FIG. 4  is a cross-sectional diagram of an image sensor module  200  according to an embodiment of the present invention. Referring to  FIG. 4 , the image sensor package  100  illustrated in  FIGS. 3A through 3C  is installed on a circuit board  140  through the external connection pad  122  using, for example, a flip-chip method. The external connection pad  122  may include a seed metal layer  123  and a metallic layer  124  stacked on the seed metal layer  123 . The circuit board  140  may be a Flexible Printed Circuit (FPC). In addition, a lens unit  130  in which a lens  132  and a lens housing  134  are included is formed on the circuit board  140  on which the image sensor chip  110  is disposed. Here, the lens  132  is arranged above the APS  112  of the image sensor chip  110  and light collected through the lens  132  passes through the IR cutting film  121  and the transmissive substrate  120  to be incident onto the APS  112  of the image sensor chip  110 . Since the size of the image sensor package  100  is small, the size of the lens unit  130  may be decreased and the size of the image sensor module  200  may also be decreased. 
         [0028]      FIG. 5  is a cross-sectional diagram of an image sensor module  300  according to another embodiment of the present invention. As illustrated in  FIG. 5 , the lens unit  130  can be directly installed on the image sensor package  100  instead of being installed on the circuit board  140 . Here, the lens unit  130  can be installed on a portion of the transmissive substrate  120  from which the IR cutting film  121  has been removed or directly on the IR cutting film  121 . In this case, the area of the circuit board  140  that was previously occupied by the lens unit  130  is no longer used and thus the size of the image sensor module  200  may be further decreased. Here, the side wall of the transmissive substrate  120  in the image sensor package  100  is coated with a black coating  136  so that the amount of light entering from the side of the image sensor package  100  without passing through the lens  132  can be reduced. The black coating  136  may be an opaque material. On the other hand, since a light blocking material is used as the adhesive  116  disposed around the image sensor chip  110 , light entering from the side of the image sensor chip  110  can be further blocked by the adhesive  116 . Accordingly, noise of the image sensor module generated by light entering into the APS  112  from places other than the lens  132  can be prevented. 
         [0029]      FIG. 6A through 6G  are cross-sectional diagrams illustrating a method of manufacturing the image sensor package of  FIGS. 3A through 3C  according to an embodiment of the present invention. 
         [0030]    Referring to  FIG. 6A , a mask layer is deposited on a side of the transmissive substrate  120  which is opposite to the side of the transmissive substrate  120  on which the IR cutting film  121  is disposed, and is patterned to form a mask layer pattern  128 . The transmissive substrate  120  may have a thickness of approximately 200 to 350 μm. The mask layer may be formed of a photoresist. A transmissive substrate  120  on which the IR cutting film  121  is not coated can also be used. In this case, an IR cutting film  121  can be formed at any convenient stage during the manufacture of a package, for example, in a stage after the image sensor chip  110  is installed on the transmissive substrate  120  and before the image sensor chip  110  is singulated from a wafer. 
         [0031]    Referring to  FIG. 6B , using the mask layer pattern  128  as an etch mask, the transmissive substrate  120  is etched to form the depression  125  at the center of the transmissive substrate  120 . The transmissive substrate  120  can be wet-etched using a HF+H 2 PO 3  solution. The depression  125  may have a thickness of approximately 100 to 300 μm in order for the image sensor chip  110  to be completely inserted into the depression  125 . Here, the side wall of the depression  125  should be inclined to form an external connection pad thereon later. Then, the mask layer pattern  128  is removed. 
         [0032]    A plurality of recesses (not illustrated) can be formed while the depression  125  is formed, wherein the recesses are connected to the depression  125 . The recesses are disposed around a circumference of the depression  125 . The recesses isolate circuit board connection units of the external connection pad  122  adjacent to the upper surface of the side wall of the depression  125 . Due to these recesses, the side wall of the depression  125  projects between the recesses forming a series of pillar shaped projections. Here, the depth of the recesses are the same as the depth of the depression  125 . 
         [0033]    Alternatively, the recesses may be formed at any appropriate stage after the depression  125  is formed. 
         [0034]    Referring to  FIG. 6C , in order to form the external connection pad  122 , the seed metal layer  123  is formed on the transmissive substrate  120  on which the depression  125  is formed. The seed metal layer  123  acts as a seed to form the metallic layer  124  thereon. The seed metal layer  123  can be formed using a sputter deposition process including a Ti/Cu layer, a Ti/Ni layer, or a Ti/Au layer. Then, a polymer dielectric pattern  129  is formed on the seed metal layer  123  at a portion of the seed metal layer  123  which exposes a portion in which the external connection pad  122  will be connected. 
         [0035]    Referring to  FIG. 6D , the metallic layer  124  is formed on the part of the seed metal layer  123  in which the external connection pad  122  will be connected. The metallic layer  124 , for example, a Ni or Au layer, can be formed on the part of the seed metal layer  123  on which the polymer dielectric pattern  129  is not formed by electroplating. 
         [0036]    Referring to  FIG. 6E , the polymer dielectric pattern  129  is removed and then the part of the seed metal layer  123  on which the metallic layer  124  is not formed is removed. Accordingly, the external connection pad  122  formed of the seed metal layer  123  and the metallic layer  124  is formed. The seed metal layer  123  on which the metallic layer  124  is not formed can be removed by wet etching. One end of the external connection pad  122  is disposed on the transmissive substrate  120  in the depression  125  and the other end thereof is disposed to extend to the edge of the transmissive substrate  120  along the upper surface of the transmissive substrate  120  projected between the recesses (not illustrated). The part of the external connection pad  122  which is disposed on the transmissive substrate  120  in the depression  125  is connected to the interconnection pad  113  of the image sensor chip  110  as described below. In addition, the part of the external connection pad  122  which is extended to the edge of the transmissive substrate  120  along the upper surface of the transmissive substrate  120  is connected to an external circuit board in a subsequent step. Therefore, an electric signal of the image sensor chip  110  can be transmitted to the external circuit board of the image sensor module through the external connection pad  122 . 
         [0037]    Meanwhile, when the recesses disposed around the depression  125  are not formed at the same time as the depression, recesses can be formed after the external connection pad  122  is formed. In this case, the depth of the recesses can be the same as or different from the depth of the depression  125 . When the depths of the recesses and the depression  125  are different, the depth of the recesses may be smaller than that of the depression  125 . 
         [0038]    Referring to  FIG. 6F , the image sensor chip  110  is arranged in the depression  125  of the transmissive substrate  120  so that the interconnection pad  113  of the image sensor chip  110  connects with the external connection pad  122  of the transmissive substrate  120 . In this case, the adhesive  116 , which is for example a Non Conductive Film (NCF), is punched so that portions are removed, leaving behind the portions through which the external connection pad  122  is connected with the interconnection pad  113  of the image sensor chip  110 . Then, the punched NCF is disposed on the external connection pad  122 . Subsequently, the image sensor chip  110  is arranged on the transmissive substrate  120  to perform thermal compression. Then, the interconnection pad  113  of the image sensor chip  110  is connected with the external connection pad  122  of the transmissive substrate  120  through a metal bump  114  formed on the interconnection pad  113 , and the image sensor chip  110  can be bonded to the transmissive substrate  120  by the adhesive  116 . 
         [0039]    Alternatively, the image sensor chip  110  can be connected to the transmissive substrate  120  using an ultrasonic bonding method as illustrated in  FIG. 7  and then an adhesive  117  such as dam material can be applied and hardened to bond the image sensor chip  110  thereto. Here, the dam material has less mobility so as not to flow into the APS  112  and seals the image sensor chip  110  in the depression  125  of the transmissive substrate  120 . In the case of ultrasonic bonding, the interconnection pad  113  of the image sensor chip  110  can be connected to the external connection pad  122  of the transmissive substrate  120  through the metal bump  114 . 
         [0040]    Referring to  FIG. 6G , the transmissive substrate  120  on which the image sensor chip  110  is bonded is diced so that the image sensor package  100  can be individually separated. Although not illustrated, the side of the transmissive substrate  120  is coated with a black material after the transmissive substrate  120  is diced into the individual image sensor package  100 , so as to reduce light entering from the side of the transmissive substrate  120 . Also, the side of the transmissive substrate  120  may be coated with an opaque material. 
         [0041]    In the image sensor package according to the present invention, the image sensor chip is disposed in the depression of the transmissive substrate so as to reduce size and contamination of the image sensor package. Meanwhile, since the recesses are formed between the circuit board connection units disposed on the side wall of the depression of the transmissive substrate, a short circuit can be prevented between the adjacent circuit board connection units when the image sensor package is connected to the circuit board to form the image sensor module. 
         [0042]    In addition, the groove, which is extended from the bottom of the depression in the lower part of the adhesive to the recesses disposed on the side wall of the depression, allows outgassing materials generated by the adhesive, which is used to bond the image sensor chip to the transmissive substrate, to be emitted and thus outgassing materials can be prevented from remaining in the depression of the transmissive substrate and contaminating the image sensor chip. 
         [0043]    Meanwhile, in the image sensor module, the lens unit is disposed on the transmissive substrate to reduce the size of the image sensor module. In this case, the outer side wall of the transmissive substrate is coated with a black or opaque material to reduce light entering from the side wall of the transmissive substrate into the image sensor chip. 
         [0044]    According to an aspect of the present invention, there is provided an image sensor package including: a transmissive substrate, wherein a depression is formed at the center of the transmissive substrate and a plurality of recesses connecting with the depression are formed along the depression; a plurality of external connection pads in which one end of each of the external connection pads is disposed on the transmissive substrate in the depression and the other end of each of the external connection pads is disposed to extend to the edge of the transmissive substrate along the upper surface of the transmissive substrate projected between the recesses; and an image sensor chip on which an Active Pixel Sensor (APS) is disposed to face the depression and a plurality of interconnection pads electrically connecting with the external connection pads are formed around the APS. 
         [0045]    An IR cutting film may be formed on the opposite surface on which the depression is formed in the transmissive substrate. 
         [0046]    The depth of the depression may be larger than the height of the image sensor chip. 
         [0047]    The external connection pads of the transmissive substrate may include a first part to which the interconnection pads of the image sensor chip are connected, the first part being disposed at the bottom of the depression, and a second part to which a circuit board is connected, the second part being disposed at an upper surface of the transmissive substrate. 
         [0048]    The image sensor package may further include a metal bump interposed between the external connection pad of the transmissive substrate and the interconnection pad of the image sensor chip. 
         [0049]    The image sensor package may further include an adhesive which seals around the image sensor chip and bonds the image sensor chip to the transmissive substrate. 
         [0050]    The image sensor package may further include a plurality of grooves which extend from the bottom of the depression on which the adhesive is formed to the recesses disposed around the depression, in order to emit gas generated during bonding using the adhesive. 
         [0051]    The external connection pad may include a Ni or Au metal layer formed on a seed metal layer, wherein the seed metal layer comprises Ti/Cu, Ti/Ni, or Ti/Au. 
         [0052]    According to another aspect of the present invention, there is provided an image sensor module including: a circuit board; an image sensor package comprising: a transmissive substrate electrically bonded to the circuit board, wherein a depression is formed at the center of a first surface in the transmissive substrate and a plurality of recesses connected with the depression are formed along the depression; a plurality of external connection pads formed on the first surface of the transmissive substrate, wherein one end of each of the external connection pads is disposed in the depression and the other end of each of the external connection pads is disposed to extend to the edge of the transmissive substrate; and an image sensor chip on which an Active Pixel Sensor (APS) is formed to face the depression and a plurality of interconnection pads electrically connecting with the external connection pads are formed around the APS; and a lens unit disposed above a second surface of the transmissive substrate to face the APS. 
         [0053]    The second surface of the transmissive substrate may include an IR cutting film formed thereon. 
         [0054]    The lens unit may be installed on the second surface of the transmissive substrate or on the circuit board. In this case, the outer side wall of the transmissive substrate of the image sensor package may be coated with an opaque material. 
         [0055]    According to another aspect of the present invention, there is provided a method of manufacturing an image sensor package including: forming a depression on a first surface of a transmissive substrate; forming a plurality of external connection pads, wherein one end of each of the external connection pads is disposed on the transmissive substrate in the depression and the other end of each of the external connection pads is disposed to extend to the edge of the transmissive substrate along the upper surface of the transmissive substrate projected between a plurality of recesses; and installing in the depression an image sensor chip, on which an Active Pixel Sensor (APS) is formed and interconnection pads are formed around the APS, so that the APS faces the transmissive substrate and the interconnection pads connect with the external connection pads. 
         [0056]    The depth of the depression may be about 100-300 μm. 
         [0057]    The forming of the depression on the first surface of the transmissive substrate may be performed when the recesses which connect with the depression are formed along the depression, or the method may further include forming a plurality of recesses which connect with the depression along the depression on a first surface of the transmissive substrate after the external connection pads are formed on the transmissive substrate and before the image sensor chip is installed on the transmissive substrate. 
         [0058]    The forming of the depression may include forming a mask pattern on the first surface of the transmissive substrate; etching the transmissive substrate using the mask pattern as an etching mask; and removing the mask pattern after the transmissive substrate is etched. 
         [0059]    The etching of the transmissive substrate may include etching using a solution obtained by mixing a hydrofluoric acid (HF) and a phosphoric acid (H 2 PO 3 ). 
         [0060]    The forming of the external connection pads may include forming a seed metal layer on the first surface of the transmissive substrate on which the depression is formed; forming a mask layer pattern on the seed metal layer; forming a metallic layer on the seed metal layer exposed by the mask layer pattern by electroplating; removing the mask layer pattern after the metallic layer is formed; and removing the on which the metallic layer is not formed, the seed metal layer having removed mask layer pattern. Here, the seed metal layer may comprise Ti/Cu, Ti/Ni, or Ti/Au and the metallic layer may comprise Ni or Au. 
         [0061]    The image sensor chip may be installed onto the transmissive substrate by a flip-chip method. 
         [0062]    The image sensor chip may further include a metal bump on the interconnection pad, and installing the image sensor chip onto the transmissive substrate may include forming an epoxy film at one end of each of the external connection pads in the depression; and arranging the interconnection pad of the image sensor chip on which the metal bump is formed, to be disposed at one end of the external connection pad on which the epoxy film is formed; and performing thermal compression of the transmissive substrate and the image sensor chip, or arranging the interconnection pad of the image sensor chip on which the metal bump is formed, to be disposed at one end of the external connection pad in the depression to perform ultrasonic bonding; and filling dam material between the outer surface of the image sensor chip ultrasonically bonded and the side wall of the depression to harden the dam material. 
         [0063]    The epoxy film or the dam material may be a light blocking material. 
         [0064]    The method may further include forming a plurality of grooves which extend from the bottom of the depression of the transmissive substrate to the recesses, after forming the external connection pads and before installing the image sensor chip onto the transmissive substrate. 
         [0065]    The method may further include forming an IR cutting film on a second surface of the transmissive substrate which is opposite to the first surface of the transmissive substrate, before forming the depression. 
         [0066]    The method may further include forming an IR cutting film on the second surface of the transmissive substrate after installing the image sensor chip onto the transmissive substrate. 
         [0067]    According to another aspect of the present invention, there is provided a method of manufacturing an image sensor module including: bonding the image sensor package manufactured according to the method described above to a circuit board; and placing a lens unit above a second surface of a transmissive substrate. 
         [0068]    While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Technology Classification (CPC): 7