Abstract:
An integrated circuit shielding film and a manufacturing method thereof. The manufacturing method provides a plate. A stripping glue is coated on the plate. An integrated circuit is disposed on the stripping glue and the stripping glue is deposited on the surface of the integrated circuit. A shielding film is then formed on the integrated circuit by coating operations.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the benefit of Taiwan Patent Application No. 101103165, filed on Jan. 31, 2012, in the Taiwan Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. 
       FIELD OF THE INVENTION 
       [0002]    The present invention relates to an IC shielding film and a manufacturing method thereof, in particular to the IC shielding film and the manufacturing method that coat a stripping glue onto a surface of a plate, so that the IC can be adhered onto the plate and will not fall off during a coating process and a polymer material is sputtered onto the IC by a sputtering method and used as a shielding material for resisting electromagnetic interference. 
       BACKGROUND OF THE INVENTION 
       [0003]    As science and technology advance, electronic products have increasingly smaller size and increasingly powerful functions. Therefore, the complexity and density of integrated circuits (IC) in the electronic products are higher, and internal transmission lines and power supply units of the IC, or other electronic components with a higher operating frequency on a printed circuit board produce electromagnetic waves, and cause an electromagnetic interference (EMI) with other components, so that the integrated circuit cannot operate normally. Therefore, the effect of the electromagnetic interference on integrated circuit has become a major issue. 
         [0004]    In general, a metal housing is usually used to protect a portion of a conventional printed circuit board and guard the printed circuit board from being affected by electromagnetic interference or a sputtering method is used to sputter a polymer shielding material such as a sputtered metal, a carbon fiber or a resin film onto a surface of the IC in order to shield the electromagnetic wave and avoid the electromagnetic interference. 
         [0005]    However, the IC generally cannot be attached onto the plate easily during the sputtering process, and the IC may fall off easily to result in a failed sputtering operation. Therefore, it is a main subject for the present invention to overcome the drawbacks of the prior art that the IC falls off easily in a coating process. 
       SUMMARY OF THE INVENTION 
       [0006]    In view of the shortcomings of the prior art, it is a primary objective of the present invention to provide an IC shielding film and a manufacturing method thereof to overcome the problem of the conventional IC that may fall off easily during a coating process. 
         [0007]    To achieve the aforementioned objective, the present invention provides a method of manufacturing an integrated circuit (IC) shielding film, and the IC shielding film manufacturing method comprises steps of: providing a plate; coating a stripping glue on the plate; disposing an IC on the stripping glue, and attaching the stripping glue onto a surface of the IC; and performing a coating operation of the IC to form a shielding film. 
         [0008]    Preferably, the method of manufacturing an IC shielding film of the present invention further comprises a step of curing the stripping glue to increase a bonding force between the IC and the plate. 
         [0009]    Preferably, the plate further comprises a lower plate, an upper plate, a plurality of conductive pillars disposed on a surface of the lower plate, and a plurality of conductive holes penetrated through a surface of the upper plate. 
         [0010]    Preferably, the method of manufacturing an IC shielding film of the present invention further comprises a step of movably latching the plurality of conductive holes with the plurality of conductive pillars to combine the upper plate onto the lower plate. 
         [0011]    Preferably, the stripping glue is coated onto the upper plate. 
         [0012]    Preferably, the surface of the IC is coupled to one of the combined conductive pillars and the conductive holes when the IC is disposed on the stripping glue. 
         [0013]    Preferably, the method of manufacturing an IC shielding film of the present invention further comprises a step of removing the lower plate to separate the conductive pillars from the conductive holes such that the portion of the stripping glue attached to the surface of the IC is stripped off together with the removal of the conductive pillars. 
         [0014]    Preferably, the lower plate has at least one positioning pillar, and the upper plate has at least one positioning hole, such that when the lower plate and the upper plate are combined, the positioning pillar is latched into the positioning hole. 
         [0015]    Preferably, the shielding film is formed by sputtering a polymer material. 
         [0016]    Preferably, the polymer material includes a fiber or a resin. 
         [0017]    Preferably, the stripping glue has a thickness from 0.3 μm to 5 μm. 
         [0018]    Preferably, the coating operation includes a liquid forming or a vapor deposition. 
         [0019]    To achieve the aforementioned objective, the present invention further provides an IC shielding film formed on an IC by the aforementioned method of manufacturing an IC shielding film. 
         [0020]    In summation, the method of manufacturing an IC shielding film of the present invention coats the stripping glue onto a surface of the plate to attach an IC onto the plate, and adjust the thickness of the stripping glue according to the requirement of the manufacturing process to facilitate the coating operation of the IC. In addition, the design of the conductive pillars on the lower plate and the conductive holes on the upper plate allows a portion of the stripping glue attached onto the surface of the IC to be stripped off together with the removal of the plurality of conductive pillars to produce a broken hole. The broken hole allows gases in the stripping glue to be discharged and prevents the stripping glue from producing air bubbles or being expanded, so that the IC will not fall off easily during the coating process, and the coating operation can be completed successfully. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0021]      FIG. 1  is a schematic view of a method of manufacturing an IC shielding film in accordance with a first preferred embodiment of the present invention. 
           [0022]      FIG. 2  is a flow chart of a method of manufacturing an IC shielding film in accordance with the first preferred embodiment of the present invention. 
           [0023]      FIG. 3  is a first schematic view of a method of manufacturing an IC shielding film in accordance with a second preferred embodiment of the present invention. 
           [0024]      FIG. 4  is a second schematic view of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention. 
           [0025]      FIG. 5  is a third schematic view of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention. 
           [0026]      FIG. 6  is a fourth schematic view of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention. 
           [0027]      FIG. 7  is a fifth schematic view of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention. 
           [0028]      FIG. 8  is a flow chart of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0029]    The technical characteristics of the present invention will become apparent with the detailed description of the preferred embodiments accompanied with the illustration of related drawings as follows. It is noteworthy to point out that the drawings not necessarily drawn according to the actual scale or exact precision, since the drawings are provided for the purpose of illustrating the invention and complementing the description of the specification, but not intended for limiting the scope of the invention. 
         [0030]    With reference to  FIG. 1 , in which a schematic view of a method of manufacturing an IC shielding film in accordance with the first preferred embodiment of the present invention, the method of manufacturing an IC shielding film provides a plate  10  first, and the plate  10  is made of aluminum alloy, plastic or any other material that cannot be melted easily by heat. And then, a stripping glue  11  is coated onto the plate  10  by a coating or printing method. Wherein, the stripping glue  11  has a thickness from 0.3 μm to 5 μm, or the thickness can be adjusted according to the requirements of the manufacturing process, and the invention is not limited to the aforementioned thickness only. And then, an IC  12  is placed on the stripping glue  11 , and the stripping glue  11  is attached onto a surface of the IC  12  to couple a surface of the IC  12  onto the plate  10 . 
         [0031]    Further, the stripping glue  11  is cured to increase the boding force between the IC  12  and the plate  10 , so that the IC  12  will not fall off easily during the coating operation due to insufficient bonding force that causes a failed sputtering. After the aforementioned steps take place, the IC  12  together with the plate  10  are placed a chamber of an equipment for performing a shield coating operation of the IC  12  to form a shielding film. Wherein, the shielding film of the IC  12  can be made of a polymer material which is formed by sputtering a shielding material, and the polymer material includes a fiber, such as polyester fiber or a nylon fiber, and the polymer material includes a resin, such as an epoxy resin or a phenolic resin, but the invention is not limited to these resins only. In addition, the coating operation includes a liquid forming or a vapor deposition. 
         [0032]    After the coating operation is completed, the IC  12  is removed, and the stripping glue  11  on the surface of the plate  10  is stripped off, so that the plate  10  can be used repeatedly for the next coating operation. 
         [0033]    With reference to  FIG. 2 , in which a flow chart of a method of manufacturing an IC shielding film in accordance with the first preferred embodiment of the present invention, the method of manufacturing an IC shielding film comprises the following steps: 
         [0034]    S 41 : Providing a plate which can be made of aluminum alloy or plastic. 
         [0035]    S 42 : Coating a stripping glue on the plate by a coating or printing method. 
         [0036]    S 43 : Placing an IC to be sputtered on the stripping glue. 
         [0037]    S 44 : Placing the IC together with the plate into a sputtering chamber to perform a sputtering operation, after the stripping glue is cured. 
         [0038]    With reference to  FIGS. 3 to 7 , in which the first to the fifth schematic views of a method of manufacturing an IC shielding film of the present invention respectively, the method of manufacturing an IC shielding film comprises the steps of: providing a lower plate  100  first, wherein the lower plate  100  includes a plurality of conductive pillars  101  and at least one positioning pillar  102 , and the conductive pillars  101  and the positioning pillar  102  are installed on a surface of the lower plate  100 ; and then providing an upper plate  110 , wherein the upper plate  110  includes a plurality of conductive holes  111  and the at least one positioning hole  112 , and the conductive holes  111  and the positioning hole  112  are holes penetrating through a surface of the upper plate  110 . Wherein, the lower plate  100  and the upper plate  110  can be made of aluminum alloy, plastic or any other material that cannot be melted easily by heat. When the upper plate  110  is combined onto the lower plate  100 , the at least one positioning pillar  102  of the lower plate  100  is aligned precisely with the at least one positioning hole  112  of the upper plate  110  to facilitate combining the upper plate  110  and the lower plate  100  successfully. And then, the at least one positioning pillar  102  is latched into the at least one positioning hole  112 , such that the plurality of conductive holes  111  of the upper plate  110  and the plurality of conductive pillars  101  of the lower plate  100  are latched respectively, and the upper plate  110  and the lower plate  100  can be combined with each other as shown in  FIG. 4 . Wherein, the latch between the at least one positioning pillar  102  and the at least one positioning hole  112  can fix the upper plate  110  onto the lower plate  100  securely to prevent them from sliding with respect to each other, when the lower plate  100  and the upper plate  110  are combined. 
         [0039]    After the upper plate  110  is combined onto the lower plate  100 , a stripping glue  120  is coated or printed onto the upper plate  110 , so that the stripping glue  120  is covered and combined to the conductive pillars  101  and the conductive hole  111 . Wherein, the stripping glue  120  has a thickness from 0.3 μm to 5 μm, and the thickness can be adjusted according to the user requirements, but it is not limited to the aforementioned thickness only. And then, the IC  130  is placed onto the stripping glue  120 , and the stripping glue  120  attached onto a surface of the IC  130  allows the surface of the IC  130  to be combined onto the upper plate  110  and the installation position of the IC  130  corresponds to one of the combined plurality of conductive pillars  101  and plurality of conductive holes  111  as shown in  FIG. 5  and whose cross-sectional view is shown in  FIG. 6 . Further, the stripping glue  120  is cured to increase the bonding force between the IC  130  and the upper plate  110 , so that the IC  130  will not fall off easily during the coating operation due to an insufficient bonding force, thus resulting in a failed sputtering. Wherein, the stripping glue  120  is attached onto the surface of the IC  130 , while covering a copper foil  131  of the IC  130 , so that a shielding area is formed on a side of the IC  130 . 
         [0040]    Finally, the IC  130  is attached securely onto the upper plate  110 , and the lower plate  100  is removed, so that the plurality of conductive pillars  101  and the plurality of conductive holes  111  are separated from one another. Now, a portion of the stripping glue  120  attached onto the surface of the IC  130  will be stripped away together with the removal of the plurality of conductive pillars  101  to produce a broken hole, so that a portion or the whole of the copper foil  131  will be exposed, and gases in the stripping glue  120  are discharged from the broken hole to prevent the stripping glue  120  from producing air bubbles or being expanded, which will cause a fall-off of the IC  130  or affect the coating operation as shown in  FIG. 7 . 
         [0041]    After the aforementioned steps are executed, the IC  130  together with the upper plate  110  can be placed into a chamber of an equipment to perform a shielding coating operation of the IC  130  to form a shielding film. Wherein, the shielding film of the IC  130  can be formed by sputtering a polymer material which is used as a shielding material, and the polymer material includes but not limited to a fiber such as a polyester fiber and a nylon fiber, or a resin such as an epoxy resin and a phenolic resin. The coating operation can be a liquid forming or a vapor deposition. The vapor deposition can be a chemical vapor deposition (CVD) or a physical vapor deposition (PVD). The physical vapor deposition (PVD) includes a thermal evaporation deposition, a plasma sputtering, or ion beam sputtering. Wherein, the principle of the physical vapor deposition is to heat and sublimate the shielding material into a gas, and then the atoms, molecules or ions of the gas are accelerated to pass through a highly vacuumed space to attach the vaporized shielding material onto a surface of the IC  130  to form a thin film on the surface to be coated, and the thin film is used for the purpose of resisting electromagnetic interference. 
         [0042]    After the coating operation is completed, the IC  130  can be removed, and the stripping glue  120  attached onto the surface of the upper plate  110  and the plurality of conductive pillars  111  of the lower plate  100  is stripped off, so that the upper plate  110  and the lower plate  100  can be used repeated for the next coating operation. 
         [0043]    With reference to  FIG. 8 , in which a flow chart of a method of manufacturing an IC shielding film in accordance with the second preferred embodiment of the present invention, the IC shielding film manufacturing method comprises the following steps: 
         [0044]    S 51 : Providing a lower plate for a positioning purpose, wherein the lower plate is made of aluminum alloy or plastic. 
         [0045]    S 52 : Providing an upper plate which is installed on the lower plate, and made of a material including but not limited to aluminum alloy and plastic. 
         [0046]    S 53 : Providing a stripping glue formed on the upper plate by a coating or printing method. 
         [0047]    S 54 : Placing an IC to be sputtered on the stripping glue. 
         [0048]    S 55 : Removing the lower plate after the IC is attached securely onto the upper plate to separate the plurality of conductive pillars from the plurality of conductive holes, such that a broken hole is formed on the stripping glue on a surface of the IC. 
         [0049]    S 56 : Placing the IC without the lower plate into a vacuum shielding film chamber to perform a coating operation of the IC to form a shielding film. 
         [0050]    S 57 : Removing the IC after the coating operation is completed, and strip the stripping glue from the surface of the upper plate to form the IC shielding film. 
         [0051]    In the method of manufacturing an IC shielding film of the present invention, the stripping glue is coated on a surface of the plate to attached the IC onto the plate securely, so that the IC will not fall off easily during the coating process, and the thickness of the stripping glue can be adjusted according to the requirements of the manufacturing process to facilitate performing the coating operation of the IC. 
         [0052]    In summation of the description above, the present invention breaks through the prior, achieves the expected effects, and complies with the patent application requirements, and thus is duly filed for patent application. 
         [0053]    While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.