Abstract:
A method of making semiconductor devices comprising the steps of: preparing non-defective individual film packages having good quality, wherein leads are formed and a semiconductor chip is mounted on each of the film packages; attaching each of the non-defective individual packages to each of mounting portions of a plate; and cutting the plate into separate pieces, each of the separated pieces corresponding to each of the mounting portions on which each of the non-defective individual film packages is mounted.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates to a semiconductor device, a method of fabricating the same, and an electronic apparatus.  
           [0003]    2. Description of Related Art  
           [0004]    In the microminiaturization of semiconductor devices, a bare chip mounting arrangement is regarded as an ideal form of assembly. However, since quality assurance and the handling of a bare chip are difficult in practice, the chip is assembled in a package during semiconductor device fabrication. As one of the package forms meeting the need for high pin counts, a ball grid array (BGA) type package has been developed recently. On a substrate of the BGA type package, external terminal bumps are arranged in an area array to permit surface mounting.  
           [0005]    As one kind of BGA type package, a tape ball grid array (T-BGA) package in which a flexible substrate (film carrier tape) is used as a base in fabrication with a tape automated bonding (TAB) technique has been used. Using the advantageous features of the film carrier tape, a T-BGA packaging technique can provide fine-pitch, high-pin-count semiconductor devices.  
           [0006]    Since the film carrier tape is liable to warp due to lack of rigidity, however, attaching a reinforcing sheet (stiffener) is required. In the process of semiconductor device fabrication, a stiffener is attached to an individual piece of film carrier tape punched out after each semiconductor chip is mounted on the film carrier tape. More particularly, the film carrier tape is punched out into separate pieces, the pieces are inspected, and then the stiffener is attached only to the non-defective pieces with good quality. In this manner, production yields can be increased since defective pieces of film are rejected prior to attaining the finished product.  
           [0007]    After this process, individual pieces of film must be handled in subsequent steps such as bump formation, resulting in trouble in fabrication.  
           [0008]    It is therefore an object of the present invention to obviate the above-mentioned drawback by providing a method of fabricating T-BGA packages which are suitable for mass-production and easy to handle, a semiconductor device fabricated by this method, and an electronic apparatus containing the semiconductor device thus fabricated.  
         SUMMARY OF THE INVENTION  
         [0009]    (1) According to a first aspect of the present invention, there is provided a method of making semiconductor devices, comprising the steps of:  
           [0010]    preparing non-defective individual film packages having good quality, wherein each of the non-defective individual film packages has a flexible substrate on which a wiring pattern is formed and a semiconductor chip having electrodes that are connected to the wiring pattern;  
           [0011]    attaching each of the non-defective individual film packages to each of mounting regions of a reinforcing member; and  
           [0012]    cutting the reinforcing member into separate pieces, each of the separated pieces corresponding to each of the mounting regions on which each of the non-defective individual film packages is mounted.  
           [0013]    In this method, the reinforcing member represents any part serving to prevent a film carrier tape from warping or bowing (to ensure planarity). As a reinforcing member, a so-called stiffener is often used in the semiconductor device fabrication.  
           [0014]    A plurality of mounting regions are provided on the reinforcing member and an individual film package is attached to each of them. Since a plurality of individual film packages forming a plurality of semiconductor devices are integrated with the reinforcing member, the subsequent steps can be carried out on a mass-production line.  
           [0015]    Further, where each individual film package is accurately attached to each mounting region of the reinforcing member, a relative positional relation between the reinforcing member and the individual film packages is fixed, thus improving the positional accuracy.  
           [0016]    Furthermore, the semiconductor chips are mounted on only non-defective individual film packages having good quality. Therefore, in the subsequent steps after the non-defective individual film packages with good quality are selected (more specifically in the subsequent steps after the non-defective individual film packages are attached to the reinforcing member), production yields can be increased substantially.  
           [0017]    (2) The method of making semiconductor devices of the present invention may further comprise, before the non-defective individual film packages are prepared, the steps of:  
           [0018]    mounting the semiconductor chip on each of predetermined areas in a film carrier tape having the wiring pattern formed on each of the predetermined areas,  
           [0019]    punching out the film carrier tape into individual film packages, and  
           [0020]    selecting the non-defective individual film packages having good quality from the individual film packages through inspection.  
           [0021]    Since the TAB process is applied to this method, an existing TAB process production line may be used and the advantageous features of the TAB process can be utilized.  
           [0022]    The method of making semiconductor devices may further comprise a step of molding a region including a connecting portion between the semiconductor chip and the film carrier tape with a resin.  
           [0023]    (3) In the method of making semiconductor devices of the present invention, after each of the non-defective individual film packages is attached to each of the mounting regions of the reinforcing member, the subsequent steps may be carried out on a production line for plastic ball grid array (P-BGA) type packages.  
           [0024]    On the P-BGA package production line, such processes as marking, ball (bump) formation, cleaning, separation into product pieces and appearance inspection can be carried out.  
           [0025]    The P-BGA package is fabricated on the base of a printed circuit board. A plurality of semiconductor chips are mounted on the printed circuit board, and then the printed circuit board is punched out into separate product pieces, each of which corresponds to each semiconductor chip.  
           [0026]    The method of the present invention can utilize the P-BGA package production line by using the reinforcing member having a plurality of individual film packages attached thereon in lieu of the printed circuit board. Thus, when an existing production line for P-BGA packages is available, no investment in new facilities is required thereby reducing manufacturing cost.  
           [0027]    (4) The method of making semiconductor devices of the present invention may further comprise the step of forming external electrodes on the wiring pattern, after the step of attaching each of the non-defective individual film packages to each of the mounting regions of the reinforcing member, and before the step of cutting the reinforcing member.  
           [0028]    Before the reinforcing member is cut into pieces, the plurality of non-defective individual film packages are attached thereon. Since external electrodes are formed in this time, the external electrodes can be formed on the plurality of non-defective individual film packages simultaneously or in succession, thus reducing fabrication time.  
           [0029]    (5) In the method of making semiconductor devices of the present invention, a slot may be formed along a cutting line for the reinforcing member so as to enclose each of the mounting regions that is supported only by at least one supporting portion; and the step of cutting the reinforcing member may be carried out by cutting the supporting portion.  
           [0030]    Since only the supporting portion is cut, a reinforcing member made of a rigid material could be easily cut. Further, deformation of the mounting region of the reinforcing member can be prevented to ensure planarity of the individual film packages attached thereon.  
           [0031]    (6) The method of making semiconductor devices of the present invention may further comprise, after the step of attaching each of the non-defective individual film packages to each of the mounting regions of the reinforcing member, and before the step of cutting the reinforcing member, the step of attaching a heat spreading member to a region including the semiconductor chip.  
           [0032]    The heat spreading member is used to efficiently dissipate heat from the semiconductor chip, and it is attached to the semiconductor chip as required depending on the amount of heat to be produced. Before the reinforcing member is cut into separate pieces, a plurality of semiconductor chips are attached thereon. It is therefore possible to attach a plurality of heat spreading members to the semiconductor chips simultaneously.  
           [0033]    (7) In the method of making semiconductor devices of the present invention, an edge portion of the heat spreading member may be disposed inside the cutting line for the reinforcing member; and in the step of cutting the reinforcing member, both sides of the reinforcing member may be clamped by a pair of holding members at the position that is outside the heat spreading member and inside the cutting line for the reinforcing member, enabling the shear force to be applied to the reinforcing member to be cut at the position that is outside the holding members.  
           [0034]    Since the vicinity of the cutting line for the reinforcing member is held by the holding members, the reinforcing member can be prevented from being distorted at the cutting. Therefore, the planarity of the individual film packages can be ensured, resulting in satisfactory mounting of external electrodes.  
           [0035]    (8) In the method of making semiconductor devices of the present invention, when a slot is formed along a cutting line for the reinforcing member so as to enclose each of the mounting regions that is supported only by at least one supporting portion,  
           [0036]    an outline of the heat spreading member may be approximately aligned with an edge of the slot on the side of each of the mounting regions, the heat spreading member being disposed inside a connecting portion in each of the mounting regions connecting with the supporting portion; and  
           [0037]    in the step of cutting the reinforcing member, both sides of the reinforcing member may be clamped by a pair of holding members at the position that is outside the heat spreading member and inside a cutting line for the supporting portion, enabling the shear force to be applied to the supporting portion at the position that is outside the holding members.  
           [0038]    Since the vicinity of the cutting line for the supporting portion of the reinforcing member is held by the holding members, the reinforcing member can be prevented from being distorted at the cutting.  
           [0039]    (9) In the method of making semiconductor devices of the present invention, when a slot is formed along a cutting line for the reinforcing member so as to enclose each of the mounting regions that is supported only by at least one supporting portion,  
           [0040]    the heat spreading member may be superposed on the reinforcing member and have a planar configuration to cover the slot, each of the mounting regions, and the supporting portion of the reinforcing member; and the heat spreading member may be cut together with the reinforcing member.  
           [0041]    A plurality of semiconductor chips are mounted on the reinforcing member. By superposing the heat spreading member having a planar configuration on the reinforcing member, the heat spreading members can be attached to a plurality of semiconductor chips simultaneously. Thus, the time required for aligning and attaching the heat spreading member can be reduced.  
           [0042]    (10) In the method of making semiconductor devices of the present invention, the heat spreading member and the reinforcing member may be provided with convex and concave portions to be engaged mutually. The heat spreading member and the reinforcing member can be thus aligned with ease.  
           [0043]    (11) According to a second aspect of the present invention, there is provided a semiconductor device fabricated by using the abovementioned method.  
           [0044]    (12) According to a third aspect of the present invention, there is provided a circuit board on which is mounted the abovementioned semiconductor device.  
           [0045]    (13) According to a fourth aspect of the present invention, there is provided an electronic apparatus including the abovementioned circuit board. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0046]    [0046]FIGS. 1A to  1 C are explanatory diagrams illustrating the semiconductor device fabrication processes according to the embodiment of the present invention;  
         [0047]    [0047]FIG. 2 is a diagram showing a film carrier tape in the embodiment of the present invention;  
         [0048]    [0048]FIG. 3 is a diagram showing the insulating film punched out from the film carrier tape;  
         [0049]    [0049]FIG. 4 is a diagram showing a reinforcing member in the embodiment of the present invention;  
         [0050]    [0050]FIG. 5 is a diagram showing the reinforcing member on which the insulating film is attached;  
         [0051]    [0051]FIG. 6 is a diagram showing the reinforcing member on which a heat spreading member is attached;  
         [0052]    [0052]FIG. 7 is a diagram showing a step of cutting the reinforcing member;  
         [0053]    [0053]FIG. 8 is a diagram showing the embodiment of a semiconductor device according to the present invention;  
         [0054]    [0054]FIG. 9 is a diagram showing a modification of the embodiment of the present invention;  
         [0055]    [0055]FIG. 10 is a diagram showing the embodiment of a circuit board according to the present invention; and  
         [0056]    [0056]FIG. 11 is a diagram showing an electronic apparatus containing the circuit board on which is mounted the semiconductor device fabricated according to the method of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0057]    The present invention will now be described in detail by way of example with reference to the accompanying drawings.  
         [0058]    [0058]FIGS. 1A to  7  are explanatory diagrams illustrating semiconductor device fabrication processes in the embodiment of the present invention, and FIG. 8 shows a finished semiconductor device according to the embodiment of the present invention.  
         [0059]    As shown in FIG. 8, a BGA package is applied to a semiconductor device  10 . In this Figure, the semiconductor device  10  comprises an insulating film  12 , a plurality of leads  20  formed on the insulating film  12 , a bumps  14  formed on each of the leads  20 , and a semiconductor chip  16 . Surface mounting can be implemented by using the plurality of the bumps  14 . The bump  14  is used as an external electrode.  
         [0060]    The insulating film  12  is obtained by punching out a long film carrier tape  30  shown in FIGS. 1A to  2 , and the insulating film  12  is formed to be larger than the semiconductor chip  16 . A device hole  24  is formed on the insulating film  12 .  
         [0061]    An end  20   a  of the lead  20  protrudes into the device hole  24 , and the end  20   a  is connected to an electrode  18  of the semiconductor chip  16 . More particularly, the semiconductor chip  16  is disposed so that the electrode  18  thereof is positioned inside the device hole  24  and on the side opposite to the lead- 20  forming side of the insulating film  12 , whereby the end  20   a  of the lead  20  is bonded to the electrode  18 .  
         [0062]    The lead  20  connects the electrode  18  of the semiconductor chip  16  to a land  21  (see FIG. 2). The land  21  is provided with the bump  14 . Each bump  14  is made of a material such as solder, for example, and the end thereof has a ball-like shape. Copper or the like may be used in lieu of solder as the material for the bump  14 .  
         [0063]    Solder resist  22  is applied onto the lead- 20  forming side of the insulating film  12 , while circumventing the bumps  14 . The surface of the lead  20  is thus covered with the solder resist  22  for protection.  
         [0064]    A stiffener  28  having a plate-like shape is attached to the insulating film  12  on the side opposite to the bumps  14 . The stiffener  28  is made of copper, stainless steel, copper alloy or the like, and is strong enough to maintain a planar configuration. The stiffener  28  is attached to the insulating film  12  by means of an insulating adhesive  29 . The insulating adhesive  29  is applied in the form of a thermosetting or thermoplastic film. Circumventing the semiconductor chip  16 , the stiffener  28  is attached to the entire surface of the insulating film  12 . Thus, the stiffener  28  prevents the insulating film  12  from being distorted or warped. This ensures uniformity in the height of the bumps  14  to improve planarity thereof, leading to an enhancement of yield in the mounting of semiconductor devices on circuit boards.  
         [0065]    Further, a heat spreader  27  is bonded to the semiconductor chip  16  on the side opposite to the surface-mounted side via a thermally conductive adhesive  25  such as silver paste. Thus, heat from the semiconductor chip  16  can be efficiently dissipated. The heat spreader  27  is formed to be larger in size than the semiconductor chip  16  and can be bonded to the stiffener  28 . Between the stiffener  28  and the heat spreader  27 , the thermally conductive adhesive  25  is provided for hermetic bonding. Depending on the amount of heat produced by the semiconductor chip  16 , an ordinary insulating adhesive or the insulating film mentioned above may be used in lieu of the thermally conductive adhesive  25 .  
         [0066]    The interstices between the semiconductor chip  16  and the insulating film  12  are sealed by potting of epoxy resin  26 . The epoxy resin  26  is also applied to the device hole  24  and the periphery of semiconductor chip  16 .  
         [0067]    The embodiment of the semiconductor device of the present invention has a configuration as described above, and the method of fabricating such semiconductor device is now described below.  
         [0068]    TAB Process  
         [0069]    First, as shown in FIGS. 1A to  1 C, the semiconductor chip  16  is mounted on the film carrier tape  30 , the potting with epoxy resin  26  is performed, and the film carrier tape  30  is punched out into separate pieces of insulating film  12  in the TAB process.  
         [0070]    More particularly, the semiconductor chip  16  is mounted on the film carrier tape  30  as shown in FIG. 1A. An enlarged view of the film carrier tape  30  is shown in FIG. 2.  
         [0071]    The film carrier tape  30  is made of a material such as polyimide resin. On the film carrier tape  30 , device holes  24  are formed, and a plurality of leads  20  and a plurality of lands  21  are arranged outside it.  
         [0072]    More specifically, on the film carrier tape  30 , a plurality of device holes  24  are formed, and a plurality of leads  20  and a plurality of lands  21  are provided outside each device hole  24 . In this figure, some of the leads  20  and lands  21  are indicated while others are omitted.  
         [0073]    The land  21  is connected to a plating lead  32  through a region of the lead  20  extending in a direction away from the device hole  24 . All the leads  20 , including those not shown in this figure, are connected to the plating lead  32 . By using the plating lead  32 , all of the leads  20  and lands  21  are electroplated. The leads  20  and lands  21  may be plated by an electroless plating technique. In this case, it is not necessary to provide the plating lead  32 .  
         [0074]    The film carrier tape  30  mentioned above is wound on a reel  33  as shown in FIG. 1A. The end of the film carrier tape  30  is rolled out, and then rolled up by a take-up reel  35 . By using a bonding jig  31 , the semiconductor chip  16  is bonded to the film carrier tape  30  between the reels  33  and  35 . For this bonding process, either single-point bonding or gang bonding may be employed. With the gang bonding, the ends  20   a  of all the leads  20  can be bonded to the electrodes  18  of each semiconductor chip  16  simultaneously.  
         [0075]    A plurality of semiconductor chips  16  are thus mounted on the film carrier tape  30  successively, and then the reel  35  takes up the film carrier tape  30  having the a plurality of semiconductor chips  16  mounted thereon.  
         [0076]    Then, as shown in FIG. 1B, the reel  35  having the film carrier tape  30  wound thereon is set on another fabrication equipment. The film carrier tape  30  is rolled out and placed between the reels  35  and  37 , and the epoxy resin  26  is potted to the film carrier tape  30 . Note that FIG. 8 shows where the epoxy resin  26  is potted.  
         [0077]    Then, after the film carrier tape  30  is taken up by the reel  37 , the reel  37  is set on still another fabrication equipment as shown in FIG. 1C. The film carrier tape  30  is rolled out and placed between the reels  37  and  39 . The film carrier tape  30  is then punched out into separate pieces of insulating film  12 .  
         [0078]    [0078]FIG. 3 shows a separate piece of insulating film  12 . As shown in this Figure, the individual insulating film  12  thus punched out has the semiconductor chip  16  mounted thereon, the semiconductor chip  16  being sealed with the epoxy resin  26 .  
         [0079]    After the above-mentioned steps, each insulating film  12  is subjected to inspection for selection of non-defective items with good quality only. These inspections include a chip mounting condition check and an electrical characteristic test, for example.  
         [0080]    Since the above steps can be carried out in conventional TAB process, existing fabrication equipment may be adapted. While the chip mounting, resin potting and punching-out steps are implemented using different apparatuses for fabrication in the embodiment described above, these fabrication apparatuses may be combined into one production line. Alternatively, any fabrication equipment capable of carrying out these mounting, potting and punching steps in succession may be employed. It is also possible to use any fabrication equipment capable of successively carrying out the punching-out step and the intermediate process described below.  
         [0081]    Intermediate Process  
         [0082]    The plate  40  shown in FIG. 4 is prepared. In a later step, the plate  40  is punched out into separate pieces, i.e., stiffeners  28  (see in FIG. 8).  
         [0083]    A plurality of device holes  42  and a plurality of slots  44  are formed on the plate  40 . As shown in FIG. 8, the device hole  42  is formed to have a rectangular (square) shape larger than the outline of the semiconductor chip  16  so that the semiconductor chip  16  can be positioned therein without touching the plate.  
         [0084]    Each slot  44  is formed on the outside of the four sides of each device hole  42  and in parallel to one of the four sides thereof. Of the parallel long sides of the slot  44 , one long side near the device hole  42  becomes one outline side of the stiffener  28 . Namely, the slot  44  is formed along a cutting line for punching out the plate  40  into stiffeners  28 .  
         [0085]    The adjacent slots  44  are not in communication with each other. Therefore, amounting portion  46  on which the individual insulating film  12  is to be attached as shown in FIG. 8 is enclosed by the slots  44  but sustained by supporting portions  48 . Each supporting portion  48  is located on an extended diagonal line of the device hole  42 .  
         [0086]    The plate  40  configured as mentioned above has a plurality of mounting portions  46  corresponding to a plurality of semiconductor chips  16 .  
         [0087]    The aforesaid insulating film  12  is then attached to each mounting portion  46  of the plate  40 . Only non-defective insulating films  12  with good quality, each having the semiconductor chip  16  mounted thereon, are allowed to be attached. Therefore, production yields can be increased in the subsequent steps.  
         [0088]    [0088]FIG. 5 shows the plate  40  on which the insulating film  12  is attached. In this Figure, the insulating film  12  is attached on the plate  40  with the semiconductor-chip- 16 -mounting side facing down. The semiconductor chip  16  is positioned inside the device hole  42  of the plate  40 . Therefore, the lands  21  and the leads (not shown) are exposed on the side opposite to the plate  40  (front side in the Figure).  
         [0089]    The insulating film  12  is bonded to the plate  40  via the insulating adhesive  29  indicated in FIG. 8. The insulating adhesive  29  may be prepared in a thermosetting or thermoplastic film form and previously attached to the plate  40 . Thus, the plate  40  can be thermocompression-bonded to the insulating film  12  on the side where the semiconductor chip  16  protrudes.  
         [0090]    As shown in FIG. 5, the insulating film  12  slightly extends from the mounting portion  46  into the slot  44 , so that positioning for formation of bumps  14  and other processes can be made by using the outline of the insulating film  12  as a guide.  
         [0091]    Then, as shown in FIG. 6, the individual heat spreader  27  is attached for each semiconductor chip  16  (not illustrated). More specifically, as shown in FIG. 8, the heat spreader  27  is bonded to cover the semiconductor chip  16  on the side opposite to the electrodes  18  and the mounting portion  46  of the plate  40  (stiffener  28 ). For this bonding, the thermally conductive adhesive  25  is used. The thermally conductive adhesive  25  may be in paste or tape form. When the thermally conductive adhesive  25  in tape form is used, it may be previously attached to the heat spreader  27 . In case that the amount of heat produced by the semiconductor chip  16  is relatively small, an insulating adhesive may be used instead of the thermally conductive adhesive.  
         [0092]    As shown in FIG. 6, the heat spreader  27  is configured not to extend into the slot  44  from the long side. Further, the heat spreader  27  is formed to circumvent a connecting portion  46   a  in the mounting portion  46  of the plate  40  connecting with the supporting portion  48 . Namely, the connecting portion  46   a  is exposed, not covered with the heat spreader  27 .  
         [0093]    In the description given above, the supporting portion  48  is a part that is positioned outside the cutting line at which each stiffener  28  is separated from the plate  40 . The connecting portion  46   a  is a part that is positioned inside the cutting line for separating the stiffener  28  from the plate  40 . Therefore, “cutting the supporting portion  48 ” and “cutting the connecting portion  46   a ” designate the same process, that is, separating each stiffener  28  from the plate  40 .  
         [0094]    Post Process  
         [0095]    After completion of the above-mentioned steps, the plate  40  having the insulating film  12  and heat spreader  27  attached thereon is put on a P-BGA package production line in the post process. By arranging the plate  40  having the insulating film  12  attached thereon to have the same configuration as that of a printed board for conventional P-BGA packages, this production line can be utilized.  
         [0096]    In the post process, any indication such as a product name is marked on the heat spreader  27 , bumps  14  are formed on the lands  21  disposed on the insulating film  12 , and then the cleaning is carried out. These steps are the same as those in conventional methods.  
         [0097]    Then, the plate  40  is cut into separate pieces, i.e., stiffeners  28 . FIG. 7 is a cross-sectional view of the plate  40  taken along the line VII-VII in FIG. 6, showing a process in which each stiffener  28  is punched out from the plate  40 .  
         [0098]    As shown in FIG. 7, the plate  40  is held between a pair of holding jigs  50  and  52 . More specifically, the plate  40 , insulating adhesive  29 , insulating film  12 , lead  20  and solder resist  22  are held between the regaining jigs  50  and  52 .  
         [0099]    With respect to a planar position of the plate  40 , the connecting portion  46   a  in the mounting portion  46  connecting with the supporting portion  48  is held between the holding jigs  50  and  52 , and the supporting portion  48  is at the position that is outside the holding jigs  50  and  52 . In other words, the plate  40  is held between the holding jigs  50  and  52  at a position which is outside the heat spreader  27  and inside the cutting line. In this state, by using a cutting punch  54 , a shear force is applied to the supporting portion  48  to cut it.  
         [0100]    In the present embodiment mentioned above, both sides of the plate  40  are held between the holding jigs  50  and  52  at a position inside the cutting line to be disconnected by the cutting punch  54 . Therefore, the entire stiffener  28  and the connecting portion  46   a  thereof are not deformed at the time of shearing by the cutting punch  54 . Thus, the insulating film  12  is prevented from being distorted or warped, ensuring uniformity in the height of the bumps  14  to improve planarity thereof. This leads to enhancement of yield in the mounting of semiconductor devices on circuit boards.  
         [0101]    Since the above steps can be carried out by using the TAB process and P-BGA package production lines, existing fabrication facilities can be utilized.  
         [0102]    It is to be understood that the present invention is not limited in its application to the above-mentioned embodiments and various changes and modifications may be made therein. For example, the aforesaid heat spreader  27  may have the same configuration as that of the plate  40 . Thus, both the plate  40  and the heat spreader  27  superposed thereon can be cut off at the same time. FIG. 9 shows a modified embodiment in connection with the heat spreader and plate.  
         [0103]    In FIG. 9, a plate  60  has the same configuration as that of the aforesaid plate  40  except that convex portions  62  are formed on one side thereof, and a plurality of mounting portions  64  are provided on the plate  60 . A heat spreader  70  also has the same configuration as that of the aforesaid plate  40  except that concave portions  72  are formed on one side thereof, and a plurality of mounting portions  74  are provided on the heat spreader  70 . The concave part  72  formed as a dent may be a through hole.  
         [0104]    The convex part  62  and the concave part  72  are formed to engage each other, and when these parts are engaged with each other, the plate  60  and the heat spreader  70  are stacked in alignment.  
         [0105]    Since the convex part  62  and concave part  72  are provided, the heat spreader  70  can be aligned with the plate  60  easily and accurately. Further, a plurality of mounting portions  74  formed on the heat spreader  70  can be attached to a plurality of mounting portions  64  formed on the plate  60  simultaneously. Alternatively, the convex portion  62  may be provided on a jig piece that is used for alignment between the plate  60  and the heat spreader  70 . In this case, the plate  60  and the heat spreader  70  do not have any convex portions. Instead, a concave portion (a hole or the like) is provided on each of the plate  60  and the heat spreader  70  at a position corresponding to the convex portion of the jig piece, so that the plate and the heat spreader can be assembled in the same manner as mentioned above.  
         [0106]    Furthermore, the plate  60  previously formed integrally with the heat spreader  70  may be used. More particularly, this arrangement can be made by providing a plate which has been drawn to have a convex shape at a region corresponding to the device hole  42 . In this case, the height (depth) of drawing is up to a position corresponding to the heat spreader in the structure mentioned above. Thus, the part count can be decreased to reduce the manufacturing cost.  
         [0107]    Further, the present invention is applicable to a front-TAB type semiconductor device in which the semiconductor chip  16  is mounted on the same side on which the bumps  14  are formed as well as a back-TAB type semiconductor device in which the semiconductor chip  16  is mounted on the side opposite to the side on which the bumps  14  are formed as shown in FIG. 8. Furthermore, a B-TAB type of insulating film having integrally formed bumps on the wiring side may be used instead of the insulating film  12 . Still further, single-point bonding may be carried out by using a film carrier tape having no bumps.  
         [0108]    [0108]FIG. 10 shows a circuit board  1000  on which a semiconductor device  1100  fabricated according to the present invention is mounted. It is common practice to use a circuit board made of organic resin material such as glass epoxy resin, for example. On the circuit board, wiring patterns made of copper or the like are formed to have desired circuits, and the bumps of the semiconductor device are physically connected with these wiring patterns to provide electrical conductivity.  
         [0109]    [0109]FIG. 11 shows a notebook-type personal computer  1200  as an example of the electronic apparatus equipped with the circuit board  1000 .  
         [0110]    In addition, by applying the present invention described above, it is also possible to fabricate surface-mounting-type electronic components (either active or passive parts) having a plurality of bumps as in semiconductor microcircuit devices, for example, such electronic components as resistors, capacitors, coils, oscillators, filters, temperature sensors, thermistors, varistors, variable resistors, and fuses.