WO2010001503A1 - 電子部品 - Google Patents
電子部品 Download PDFInfo
- Publication number
- WO2010001503A1 WO2010001503A1 PCT/JP2009/000608 JP2009000608W WO2010001503A1 WO 2010001503 A1 WO2010001503 A1 WO 2010001503A1 JP 2009000608 W JP2009000608 W JP 2009000608W WO 2010001503 A1 WO2010001503 A1 WO 2010001503A1
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- WIPO (PCT)
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- conductive
- electronic component
- ground electrode
- substrate
- cap
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- H—ELECTRICITY
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Definitions
- the present invention relates to an electronic component. Specifically, the present invention relates to an electronic component in which a semiconductor element such as a sensor chip or an electronic circuit is housed in a package.
- Patent Document 1 and 2 are an exploded perspective view and a cross-sectional view of the electronic component 11 disclosed in Patent Document 1.
- FIG. 1 and 2 are an exploded perspective view and a cross-sectional view of the electronic component 11 disclosed in Patent Document 1.
- FIG. 11 the upper part of the semiconductor element 13 mounted on the upper surface of the substrate 12 is covered with a metal cap 14.
- the semiconductor element 13 mounted on the upper surface of the substrate 12 is connected to a pad 16 by a bonding wire 15, and the pad 16 is connected to a lead electrode 18 on the back surface by a via hole 22.
- An annular ground electrode 19 is provided on the outer periphery of the upper surface of the substrate 12 so as to surround the circuit region, and the ground electrode 19 is connected to the ground pattern 20 on the back surface of the substrate 12 by a via hole 17.
- the metal cap 14 is bonded to the ground electrode 19 by the conductive resin adhesive 21, is mechanically fixed to the ground electrode 19, and is electrically connected to the ground electrode 19.
- the ground electrode 19 for connecting the metal cap 14 is provided on the upper surface of the substrate 12, thereby suppressing adverse effects on the circuit function due to the capacitance C between the extraction electrode 18 and the metal cap 14.
- the conductive resin adhesive 21 may flow out inward and the semiconductor element 13 may be short-circuited by the conductive resin adhesive 21. That is, when the metal cap 14 is fixed to the substrate 12, the conductive resin adhesive 21 discharged from the syringe is applied along the ground electrode 19, and between the ground electrode 19 and the lower surface of the outer periphery of the metal cap 14. A metal cap 14 is stacked on the substrate 12 so as to sandwich the conductive resin adhesive 21 therebetween, and the metal cap 14 is further pressed.
- the conductive resin adhesive 21 is pushed out from between the ground electrode 19 and the metal cap 14, and the conductive resin adhesive 21 that has flowed inward is the signal input / output.
- the pad 16 for power supply or power supply. Since the conductive resin adhesive 21 is in contact with the ground electrode 19 and has a ground potential, when the pad 16 is touched, the circuit is short-circuited, which is a problem to be solved.
- the height of the electronic component 11 is likely to vary due to the thickness variation of the conductive resin adhesive 21. That is, when the metal cap 14 is strongly pressed when the metal cap 14 is bonded with the conductive resin adhesive 21, the conductive resin adhesive 21 may flow out inward as described above to cause a short circuit. The metal cap 14 could not be sufficiently pressed when the cap 14 was bonded, and thus the thickness of the conductive resin adhesive 21 varied. Since the height of the electronic component 11 is determined by the sum of the thickness of the substrate 12, the height of the metal cap 14, and the thickness of the conductive resin adhesive 21, the electronic component 11 is affected when the thickness of the conductive resin adhesive 21 varies. The height of the will not be consistent.
- FIG. 3 is a cross-sectional view showing the electronic component 31 disclosed in Patent Document 2.
- a high-frequency semiconductor element 34 is mounted on an island portion 33 provided on the upper surface of a substrate 32, and the island portion 33 is connected to a lead-out electrode 36 on the back surface via a via hole 35.
- the electrode of the semiconductor element 34 is connected to a pad 38 on the substrate 32 by a bonding wire 37, and the pad 38 is connected to a lead electrode 40 on the back surface via a via hole 39.
- a groove portion 41 is provided on the outer peripheral portion of the upper surface of the substrate 32 by cutting with a dicing blade.
- the substrate 41 must be mechanically processed with a dicing blade to produce the groove 41, which increases the manufacturing cost.
- the groove portion 41 is provided after the substrate 32 is manufactured, it is difficult to provide a conductive pattern in the groove portion 41 that is an adhesive portion, and it is not suitable for bonding involving conduction between the metal cap and the conductive pattern (ground electrode) of the substrate.
- the variation in the height of the electronic component 31 increases due to the variation in machining of the groove 41.
- the present invention has been made in view of the technical problems as described above.
- the object of the present invention is to provide a semiconductor element by bonding a conductive cap to a ground electrode provided on a substrate with a conductive bonding member. It is an object of the present invention to provide an electronic component that can prevent the conductive adhesive resin from flowing out by an inexpensive means and can reduce the height variation.
- a semiconductor element is mounted on the upper surface of a substrate, a ground electrode is formed in a region surrounding the semiconductor element on the upper surface of the substrate, and the conductive material is formed on the substrate so as to cover the semiconductor element.
- the conductive cap has a pressing portion on a part of the lower surface, and the pressing portion Furthermore, the lower surface of the conductive cap and the ground electrode are bonded to each other on the outer peripheral side by the conductive bonding member.
- the semiconductor element mounted on the upper surface of the substrate is covered with a package composed of the substrate and the conductive cap, and the conductive cap is electrically connected to the ground electrode. It can be shielded from high frequency noise.
- a pressing portion is provided on a part of the lower surface of the conductive cap, and the lower surface of the conductive cap and the ground electrode are bonded by a conductive bonding member on the outer peripheral side of the pressing portion. The conductive bonding member between the lower surface of the electrode and the ground electrode is stopped by the pressing portion of the conductive cap, and does not flow inward beyond that, or the conductive bonding member penetrates into the inner side beyond the pressing portion.
- the conductive bonding member is prevented from entering inside the ground electrode and short-circuiting the internal circuit.
- the conductive cap can be pressed sufficiently against the substrate, the height of the electronic component is almost determined by the sum of the thickness of the substrate and the height of the conductive cap, thereby reducing variations in the height of the electronic component. Can do.
- a part of the ground electrode is covered with a covering member such as a solder resist or a silk pattern, and a part of the ground electrode is disposed on the outer peripheral side of the region covered with the covering member. It is exposed from the covering member, and the pressing portion is arranged on the upper surface of the covering member.
- the thickness of the conductive bonding member between the lower surface of the conductive cap and the ground electrode can be made thicker by the thickness of the covering member than when the pressing portion is disposed on the upper surface of the ground electrode.
- the conductive cap can be bonded to the ground electrode more reliably and firmly.
- Another embodiment of the electronic component of the present invention is characterized in that the lower surface of the conductive cap is recessed above the pressing portion on the outer peripheral side of the pressing portion on the lower surface of the conductive cap. Yes.
- the thickness of the conductive bonding member between the lower surface of the conductive cap and the ground electrode can be increased by the amount of depression of the lower surface of the conductive cap, making the conductive cap more reliable and strong. Can be bonded to the ground electrode.
- Still another embodiment of the electronic component of the present invention is characterized in that a gap between the lower surface of the conductive cap and the ground electrode is gradually increased toward the outer peripheral side from the pressing portion. It is said. According to such an embodiment, the thickness of the conductive bonding member between the lower surface of the conductive cap and the ground electrode can be increased by the amount that the gap between the lower surface of the conductive cap and the ground electrode is gradually increased. The conductive cap can be more reliably and firmly bonded to the ground electrode.
- the pressing portion may be disposed on the upper surface of the ground electrode.
- the pressing portion when the lower surface of the conductive cap is depressed or the gap between the lower surface of the conductive cap and the ground electrode is gradually increased, the pressing portion is disposed on the upper surface of the ground electrode. Even so, it is possible to obtain a space for holding the conductive bonding member between the lower surface of the conductive cap and the ground electrode.
- the means for solving the above-described problems in the present invention has a feature in which the above-described constituent elements are appropriately combined, and the present invention enables many variations by combining such constituent elements. .
- FIG. 1 is an exploded perspective view of the electronic component disclosed in Patent Document 1.
- FIG. FIG. 2 is a cross-sectional view of the above electronic component.
- FIG. 3 is a cross-sectional view of the electronic component disclosed in Patent Document 2.
- FIG. 4 is a cross-sectional view showing the structure of the electronic component according to Embodiment 1 of the present invention.
- FIG. 5 is an enlarged view of a portion X in FIG.
- FIG. 6 is a top view showing the substrate of the electronic component.
- FIG. 7 is a top view of the same substrate with the solder resist removed.
- FIG. 8 is a bottom view of the substrate of the electronic component.
- FIG. 9 is a cross-sectional view for explaining a method of applying a conductive adhesive resin.
- FIG. 9 is a cross-sectional view for explaining a method of applying a conductive adhesive resin.
- FIG. 10 is a cross-sectional view showing a part of an electronic component according to a modification of the first embodiment.
- FIG. 11 is a cross-sectional view showing the structure of an electronic component according to Embodiment 2 of the present invention.
- FIG. 12 is an enlarged view of a Y portion in FIG.
- FIG. 13 is a partial cross-sectional view showing different assembled states of the electronic component of the second embodiment.
- FIG. 14 is a cross-sectional view illustrating a part of an electronic component according to a modification of the second embodiment.
- FIG. 15 is a cross-sectional view showing the structure of an electronic component according to Embodiment 3 of the present invention.
- FIG. 16 is a cross-sectional view showing the structure of an electronic component according to Embodiment 4 of the present invention.
- FIG. 17 is a cross-sectional view illustrating a part of an electronic component according to a modification of the fourth embodiment.
- FIG. 18 is a cross-sectional view showing the structure of an electronic component according to Embodiment 5 of the present invention.
- FIG. 19 is a cross-sectional view showing the structure of an electronic component according to Embodiment 6 of the present invention.
- FIG. 20 is a top view illustrating the substrate of the electronic component of the sixth embodiment.
- FIG. 21 is a top view of the same substrate with the solder resist removed.
- FIG. 22 is a partial cross-sectional view showing the structure of an electronic component according to Embodiment 7 of the present invention.
- FIG. 4 is a cross-sectional view showing the structure of the electronic component according to Embodiment 1 of the present invention
- FIG. 5 is an enlarged view of a portion X in FIG. 6 is a top view of the substrate
- FIG. 7 is a top view of the substrate with the solder resist (covering member) removed
- FIG. 8 is a bottom view of the substrate.
- the electronic component 51 shown here is obtained by mounting a semiconductor element 53 on the upper surface of a substrate 52 and placing the semiconductor element 53 in a package (Faraday cage) made up of the substrate 52 and a conductive cap 54.
- the substrate 52 is constituted by a printed circuit board. As shown in FIG. 7, the upper surface of the substrate 52 is patterned with a metal thin film made of Cu or the like attached to the upper surface of the insulating plate 52a. 56 and a ground electrode 57 are formed.
- the ground electrode 57 is formed on the outer peripheral portion of the substrate 52 so as to surround the island portion 55 and the pad 56, and the pad 56 is disposed in the vicinity of the island portion 55.
- a surface-side ground pattern 58 is formed in a region in the ground electrode 57 where the island portion 55 and the pad 56 are not present.
- the island portion 55, the pad 56, the ground electrode 57, and the surface side ground pattern 58 are separated from each other by grooves 61, 62, and 63.
- the region excluding the outer peripheral portion of the island portion 55 is covered with a solder resist 67 for protecting the surface of the metal thin film.
- the surface of the surface side ground pattern 58 is also covered with the solder resist 67.
- a solder resist 67 is also formed in a region from the inner peripheral portion of the ground electrode 57 to the portion where the insulating plate 52a in the groove 63 is exposed.
- the solder resist 67 covers the range of the width of 0.10 mm of the inner peripheral portion of the ground electrode 57.
- solder resists 67 are applied to the surface of the substrate 52 to a uniform thickness by screen printing a molten solder resist, and then cured by heating.
- a solder resist is used as the covering member, but a silk pattern or the like may be used in addition to this.
- a lead electrode 59 and a back-side ground pattern 60 are formed on the lower surface of the substrate 52 by patterning a metal thin film such as Cu attached to the lower surface of the insulating plate 52a. Yes.
- the lead electrode 59 and the back side ground pattern 60 are separated from each other by a groove 64.
- These lead electrodes 59 and back surface side ground pattern 60 are patterns for solder mounting on a substrate (for example, a mother board for a mobile phone) on which the electronic component 51 is mounted.
- via holes are provided in the insulating plate 52 a so as to penetrate the front and back surfaces, and the pads 56 are electrically connected to the extraction electrodes 59 by the via holes 65, and the island portions 55 and the ground electrodes 57.
- the front surface side ground pattern 58 may be connected to the back surface side ground pattern 60 by via holes, or may be electrically floating from the ground, or may not be present.
- the semiconductor element 53 is an element such as a sensor chip for various sensing, LSI, or ASIC, and is bonded and fixed on the island portion 55 and the solder resist 67 on the upper surface thereof by a die bond resin 68.
- a die bond resin 68 an adhesive resin such as silicone or epoxy is used, and the die bond resin 68 blocks an extra force from the external environment.
- the terminal of the semiconductor element 53 and the pad 56 are connected by the bonding wire 69, so that the terminal of the semiconductor element 53 is electrically connected to the lead electrode 59 on the lower surface.
- a plurality of semiconductor elements may be mounted on the upper surface of the substrate 52, and other electric / electronic components may also be mounted.
- the pattern of the metal thin film can be freely designed as appropriate according to the form of the semiconductor element or electrical / electronic component to be mounted.
- the conductive cap 54 is formed in a cap shape by a metal material having a small specific resistance, and a space for accommodating the semiconductor element 53 and the like is formed on the lower surface.
- a flange 70 extending substantially horizontally is formed on the entire periphery of the lower end of the conductive cap 54.
- a recess 71 is provided over the entire circumference on the front end side of the lower surface of the flange 70, and a pressing portion 72 having a convex shape is formed around the entire periphery of the lower surface of the flange 70 (inside the conductive cap 54). Is formed.
- the conductive cap 54 is manufactured by pressing a metal plate, and the recess 71 is formed simultaneously with the pressing. Therefore, compared with the case where the concave portion 71 is formed by cutting, the concave portion 71 can be formed at a low cost and with small dimensional variations.
- the conductive cap 54 is placed on the substrate 52 so as to cover the semiconductor element 53 and the like, and the pressing portion 72 on the lower surface of the flange 70 is in contact with the solder resist 67 on the ground electrode 57 over the entire circumference.
- the space between the recess 71 of the flange 70 and the ground electrode 57 and the solder resist 67 is filled with the conductive bonding member 73, and the conductive cap 54 is bonded and fixed to the ground electrode 57 by the conductive bonding member 73.
- it is electrically connected to the ground electrode 57 by the conductivity of the conductive bonding member 73 and becomes the same potential (ground potential) as the back surface side ground pattern 60 on the lower surface.
- a material such as a conductive epoxy resin (for example, an epoxy resin containing a silver filler) or solder is used.
- the Faraday cage is constituted by the conductive cap 54 connected to the ground and the substrate 52 having the back-side ground pattern 60 connected to the ground, a high frequency from the outside Noise can be cut off and the influence of external noise on the semiconductor element 53 can be reduced.
- the package may have a sealed structure or may not have a sealed structure depending on the type of the semiconductor element 53 to be accommodated. For example, when moisture resistance and chemical resistance are required, the package is desirably airtight. Alternatively, when it is sufficient to block dust, light, and the like from the outside, it is only necessary to cover the semiconductor element 53 and the like with a package, and airtightness is not necessarily required. Alternatively, when an acoustic sensor or the like is mounted as the semiconductor element 53, a hole for allowing acoustic vibrations to pass through may be provided in the top of the conductive cap 54 or the like.
- the conductive bonding member 73 there may be a hole to the extent that the outside and inside of the package are connected by a void or the like.
- a firm joint member reservoir (fillet) is formed on the outer periphery thereof, the conductive cap 54 and the substrate 52 are formed. Ventilation at the joint portion can be blocked. Therefore, when it is desired to provide the package with airtightness, the airtightness can be improved.
- the pressing portion 72 on the lower surface of the flange 70 abuts against the solder resist 67 so that the pressing portion 72 and the solder resist 67 are placed on the inner side of the conductive bonding member 73. Therefore, when the conductive cap 54 is bonded, the molten conductive bonding member 73 can be prevented from flowing into the interior, and the conductive bonding member 73 that has flowed into the circuit portion such as the pad 56 can be prevented. Touching can prevent short circuit.
- the thickness of the space filled with the conductive bonding member 73 is the sum of the thickness of the solder resist 67 and the height of the concave portion 71, the thickness of the conductive bonding member 73 can be gained, and a sufficient amount of conductivity can be obtained.
- the bonding can be performed by the conductive bonding member 73 and the generation of bubbles can be prevented, and the conductive cap 54 can be firmly bonded to the substrate 52.
- the pressing portion 72 of the flange 70 is in direct contact with the upper surface of the solder resist 67, the height of the electronic component 51 is equal to the thickness of the substrate 52 and the conductive cap 54 regardless of the thickness of the conductive bonding member 73. Since the thickness of the solder resist 67 can be determined by the screen thickness during screen printing, variations in the height dimension of the electronic component 51 can be reduced, and the height accuracy of the electronic component 51 can be obtained. be able to.
- the reason why a part of the ground electrode 57 is exposed from the solder resist 67 is to electrically connect the ground electrode 57 and the conductive cap 54 by the conductive bonding member 73. Further, since the conductive bonding member 73 has a small wetting angle with respect to the solder resist 67, if the conductive resist 73 covers the outer edge of the ground electrode 57 with the solder resist 67, the conductive bonding member 73 of the conductive resist 73. There is a risk of flowing to the outer periphery.
- the conductive bonding member 73 Since the conductive bonding member 73 has a larger wetting angle with respect to the ground electrode 57 (inorganic material) than the solder resist 67, the outer peripheral side of the ground electrode 57 is exposed from the solder resist 67 as in this embodiment. The conductive bonding member 73 is less likely to leak to the outer peripheral side of the ground electrode 57.
- FIG. 9 is a cross-sectional view for explaining a procedure for assembling the electronic component 51 by bonding the conductive cap 54 to the substrate 52.
- a stamper 74 (transfer pin), a part of which is shown in FIG. 9A, is formed in an annular shape or a cylindrical shape in accordance with the shape of the ground electrode 57. After the conductive bonding member 73 is applied to the lower surface of the stamper 74 as shown in FIG. 9A, the stamper 74 is pressed onto a region of the ground electrode 57 that is not covered with the solder resist 67 and transferred to the region.
- the conductive cap 54 is overlaid on the substrate 52 with the flange 70 aligned with the ground electrode 57, and the conductive joining member 73 is pressed by the recess 71 as shown in FIG. 9B, as shown in FIG. 9C.
- the pressing portion 72 is brought into contact with the upper surface of the solder resist 67.
- the conductive joining member 73 is pressed by the flange 70 and spreads into the space between the recess 71 and the ground electrode 57, but the inner end of the space is a wall formed by the pressing portion 72 and the solder resist 67. Therefore, the conductive bonding member 73 does not flow into the conductive cap 54.
- the conductive bonding member 73 may be applied along the ground electrode 57 with a syringe or the like.
- FIG. 10 is a cross-sectional view showing a part of an electronic component according to a modification of the first embodiment.
- the solder resist 67 that covers the extraction electrode 59 is removed, and the pressing portion 72 of the flange 70 is brought into contact with the surface of the extraction electrode 59.
- the thickness of the conductive bonding member 73 filled between the flange 70 and the extraction electrode 59 is equal to the height of the recess 71 and is slightly thinner than in the first embodiment.
- the conductive bonding member 73 filled between the flange 70 and the extraction electrode 59 does not flow into the conductive cap 54 because the pressing portion 72 located on the inner side serves as a wall.
- the surface of the extraction electrode 59 exposed from the solder resist 67 may be covered with a plating layer such as Au plating. Also in the modification, the surface of the extraction electrode 59 may be covered with a plating layer such as Au plating.
- FIG. 11 is a cross-sectional view showing the structure of an electronic component according to Embodiment 2 of the present invention.
- FIG. 12 is an enlarged view of a Y portion in FIG.
- the difference between the electronic component 81 of the second embodiment and the electronic component 51 of the first embodiment is that, in the electronic component 81 of the second embodiment, the concave portion 71 is not provided in the flange 70 of the conductive cap 54, and the pressing portion 72. It is only the point that is flat.
- the vicinity of the bent portion on the lower surface of the flange 70 is a pressing portion 72, and the pressing portion 72 is brought into contact with the upper surface of the solder resist 67.
- the conductive cap 54 is bonded to the ground electrode 57 and electrically connected by the conductive bonding member 73 sandwiched between the two.
- the thickness of the conductive bonding member 73 is substantially the same as that of the solder resist 67 (about 20 ⁇ m), which is slightly thinner than that in the first embodiment.
- the end surface of the solder resist 67 serves as a wall to prevent the solder resist 67 from flowing into the conductive cap 54.
- the flange 70 is in contact with the solder resist 67 and the height of the electronic component 81 is determined by the thickness of the substrate 52 and the height of the conductive cap 54 regardless of the thickness of the conductive bonding member 73. The variation in height of the electronic component 81 can be reduced.
- the conductive bonding member 73 may be interposed between the pressing portion 72 and the solder resist 67 by a capillary phenomenon or the like, as shown in FIG. May invade.
- the pressing portion 72 is not in contact with the solder resist 67 in a strict sense.
- the conductive bonding member 73 is applied to the outside of the pressing portion 72 and the pressing portion 72 is sufficiently pressed against the solder resist 67, the conductive bonding member 73 is pressed against the pressing portion 72 and the solder resist. 67, even if it penetrates between them, the film thickness is very thin and the conductive bonding member 73 is held between the pressing portion 72 and the solder resist 67 by surface tension.
- FIG. 14 is a cross-sectional view illustrating a part of an electronic component according to a modification of the second embodiment.
- a region exposed from the solder resist 67 on the surface of the ground electrode 57 is covered with a plating layer 82 made of an inferior metal such as Au plating to protect the ground electrode 57.
- FIG. 15 is a cross-sectional view showing the structure of an electronic component according to Embodiment 3 of the present invention.
- the front end (outer peripheral edge) of the flange 70 is inclined or curved obliquely upward (the one-dot chain line is a line segment extending the lower surface of the flange 70), and the flange 70 is pressed against the base.
- the part 72 is brought into contact with the upper surface of the solder resist 67. Therefore, the thickness of the space between the lower surface of the flange 70 and the plating layer 82 on the ground electrode 57 can be made larger than the thickness of the solder resist 67.
- the thickness of the conductive bonding member 73 can be increased, and the bonding strength of the conductive cap 54 can be increased.
- the solder resist 67 covering the ground electrode 57 may be eliminated. Since the flange 70 is inclined or curved, a space (gap) is generated between the outer peripheral portion of the flange 70 and the ground electrode 57 even if the pressing portion 72 at the base of the flange 70 is brought into direct contact with the ground electrode 57. This is because the conductive cap 54 can be bonded to the substrate 52 by filling the space with the conductive bonding member 73.
- FIG. 16 is a cross-sectional view showing the structure of an electronic component according to Embodiment 4 of the present invention.
- the conductive cap 54 in which the concave portion 71 and the pressing portion 72 are formed in the flange 70 is used.
- the pressing portion 72 of the conductive cap 54 is in contact with the surface of the insulating plate 52 a inside the ground electrode 57.
- the inner surface of the recess 71 and the substrate 52 are joined by a conductive joining member 73 applied so as to cover the ground electrode 57.
- FIG. 17 is a cross-sectional view illustrating a part of an electronic component according to a modification of the fourth embodiment.
- a solder resist 67 is formed on the upper surface of the insulating plate 52a on the inner peripheral side of the ground electrode 57 and away from the ground electrode 57.
- the solder resist 67 is formed in an annular shape so as to be parallel to the ground electrode 57.
- the pressing portion 72 at the base of the flange 70 is brought into contact with the upper surface of the solder resist 67, and the pressing portion 72 is applied by the conductive bonding member 73 applied so as to cover the ground electrode 57 on the outer peripheral side of the solder resist 67.
- the substrate 52 are bonded together.
- FIG. 18 is a cross-sectional view showing the structure of an electronic component according to Embodiment 5 of the present invention.
- the entire surface (outer surface and inner surface) of the cap main body 92 of a resin molded product formed into a cap shape using a resin is electrically conductive 93 (for example, one layer).
- the conductive cap 54 is formed by coating with a plurality of layers of plating films).
- the conductive film 93 may be provided inside the cap body 92 over the entire surface of the cap body 92. In this case, a part of the conductive film 93 may be exposed on the lower surface of the flange 70 so as to be electrically connected to the ground electrode 57.
- FIG. 19 is a cross-sectional view showing the structure of an electronic component according to Embodiment 6 of the present invention.
- FIG. 20 is a top view showing the substrate 52 on which the semiconductor element 53 is mounted
- FIG. 21 is a top view showing the substrate 52 before the solder resist 67 is formed.
- the island portion 55, the surface side ground pattern 58, and the ground electrode 57 are integrally formed. That is, the grooves 61 and 63 in the first embodiment are eliminated. As a result, only the pad 56 is separated by the groove 62. Accordingly, as shown in FIG. 20, the solder resist 67 is also formed on the entire outer periphery of the ground electrode 57 (region where the conductive bonding member 73 is applied) and the metal thin film region excluding the pad 56.
- FIG. 22 is a partial cross-sectional view showing the structure of an electronic component according to Embodiment 7 of the present invention.
- the bent portion 102 is provided by slightly bending or curving the lower end portion of the conductive cap 54 toward the outer peripheral side, and the lower surface of the distal end portion of the bent portion 102 is used as the pressing portion 72.
- the horizontal flange 70 does not exist, and a sufficiently long region does not exist on the outer peripheral side of the pressing portion 72.
- the conductive cap 54 can be bonded to the ground electrode 57 by holding the conductive bonding member 73 between the distal end surface of the bent portion 102 on the outer peripheral side and the ground electrode 57.
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Abstract
Description
52 基板
53 半導体素子
54 導電性キャップ
55 アイランド部
57 接地電極
59 引き出し電極
67 ソルダーレジスト
68 ダイボンド樹脂
69 ボンディングワイヤ
70 フランジ
71 凹部
72 押し当て部
73 導電性接合部材
81 電子部品
82 メッキ層
図4は本発明の実施形態1による電子部品の構造を示す断面図、図5は図4のX部拡大図である。また、図6は基板の上面図、図7はソルダーレジスト(被覆部材)を除いた状態の基板の上面図、図8は基板の下面図である。ここに示す電子部品51は、基板52の上面に半導体素子53を実装し、基板52と導電性キャップ54からなるパッケージ(ファラデーケージ)内に半導体素子53を納めたものである。
図10は、実施形態1の変形例による電子部品の一部を示す断面図である。この変形例では、引き出し電極59を覆うソルダーレジスト67を除いてあり、フランジ70の押し当て部72を引き出し電極59の表面に当接させている。このような形態では、フランジ70と引き出し電極59の間に充填された導電性接合部材73の厚みは、凹部71の高さと等しくなり、実施形態1の場合よりもやや薄くなる。また、フランジ70と引き出し電極59の間に充填された導電性接合部材73は、その内側に位置する押し当て部72が壁となるので、導電性キャップ54の内側へ流れ込むことがない。
図11は、本発明の実施形態2による電子部品の構造を示す断面図である。また、図12は、図11のY部拡大図である。実施形態2の電子部品81と実施形態1の電子部品51との違いは、実施形態2の電子部品81では、導電性キャップ54のフランジ70に凹部71が設けられておらず、押し当て部72が平坦になっている点だけである。
図14は、実施形態2の変形例による電子部品の一部を示す断面図である。この変形例では、接地電極57の表面のうちソルダーレジスト67から露出している領域をAuメッキ等の不銹性の金属からなるメッキ層82によって覆い、接地電極57を保護している。
図15は、本発明の実施形態3による電子部品の構造を示す断面図である。この電子部品においては、フランジ70の先端(外周端縁)を斜め上方へ向けて傾斜もしくは湾曲させ(1点鎖線はフランジ70の下面を延長した線分である。)、フランジ70基部の押し当て部72をソルダーレジスト67の上面に当接させている。よって、フランジ70の下面と接地電極57の上のメッキ層82との間の空間の厚みをソルダーレジスト67の厚みよりも大きくすることができる。その結果、導電性接合部材73の厚みを大きくでき、導電性キャップ54の接合強度を高めることができる。
図16は、本発明の実施形態4による電子部品の構造を示す断面図である。この実施形態においては、フランジ70に凹部71と押し当て部72を形成された導電性キャップ54を用いている。そして、導電性キャップ54の押し当て部72を、接地電極57よりも内側において絶縁板52aの表面に当接させている。当接部分よりも外周側においては、接地電極57を覆うように塗布された導電性接合部材73によって凹部71の内面と基板52とを接合させている。
図17は、実施形態4の変形例による電子部品の一部を示す断面図である。この変形例においては、接地電極57の内周側において接地電極57から離して絶縁板52aの上面にソルダーレジスト67を形成してある。このソルダーレジスト67は、接地電極57と平行となるようにして環状に形成されている。そして、フランジ70の基部の押し当て部72をソルダーレジスト67の上面に当接させ、ソルダーレジスト67の外周側において、接地電極57を覆うように塗布された導電性接合部材73によって押し当て部72と基板52とを接合させている。
図18は、本発明の実施形態5による電子部品の構造を示す断面図である。この実施形態の電子部品91においては、樹脂(例えば、液晶ポリマー)を用いてキャップ形状に成形された樹脂モールド品のキャップ本体92の表面全体(外面及び内面)を導電膜93(例えば、1層または複数層のメッキ膜)で被覆して導電性キャップ54を構成している。
図19は、本発明の実施形態6による電子部品の構造を示す断面図である。図20は、半導体素子53を実装された基板52を示す上面図、図21はソルダーレジスト67を形成する前の基板52を示す上面図である。この実施形態の電子部品101に用いる基板52では、図21に示すように、アイランド部55と表面側接地パターン58と接地電極57を一体に形成している。すなわち、実施形態1における溝61、63を無くしている。この結果、パッド56だけが溝62によって分離されている。これに伴って、ソルダーレジスト67も、図20に示すように、接地電極57の外周部(導電性接合部材73を塗布する領域)とパッド56を除く金属薄膜領域の全体に形成している。
図22は、本発明の実施形態7による電子部品の構造を示す部分断面図である。この実施形態では、導電性キャップ54の下端部を外周側に向けてやや屈曲または湾曲させて曲げ部102を設けてあり、曲げ部102の先端部下面を押し当て部72としている。この実施形態では水平なフランジ70が存在せず、押し当て部72の外周側には十分に長い領域が存在していないが、この場合でも、図22に示すように、押し当て部72よりも外周側の曲げ部102先端面と接地電極57との間に導電性接合部材73を保持させて導電性キャップ54を接地電極57に接合させることができる。
Claims (5)
- 基板の上面に半導体素子を実装し、前記基板の上面の前記半導体素子を囲む領域に接地電極を形成し、前記半導体素子を覆うようにして前記基板の上に導電性キャップを重ねて導電性接合部材により前記導電性キャップの下面全周を前記接地電極に接合させた電子部品において、
前記導電性キャップは下面の一部に押し当て部を有し、前記押し当て部よりも外周側において前記導電性キャップの下面と前記接地電極とを前記導電性接合部材によって接合させたことを特徴とする電子部品。 - 前記接地電極の一部を被覆部材により覆って当該被覆部材で覆われた領域よりも外周側において前記接地電極の一部を当該被覆部材から露出させ、前記押し当て部を前記被覆部材の上面に配したことを特徴とする、請求項1に記載の電子部品。
- 前記導電性キャップ下面の前記押し当て部よりも外周側において、前記導電性キャップの下面を前記押し当て部よりも上方へ窪ませたことを特徴とする、請求項1に記載の電子部品。
- 前記押し当て部よりも外周側へ向かうに従って、前記導電性キャップの下面と前記接地電極との間の隙間が次第に大きくなるようにしたことを特徴とする、請求項1に記載の電子部品。
- 前記押し当て部を前記接地電極の上面に配したことを特徴とする、請求項3または4に記載の電子部品。
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KR1020107002770A KR101101562B1 (ko) | 2008-07-01 | 2009-02-16 | 전자 부품 |
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EP09773081.6A EP2187435B1 (en) | 2008-07-01 | 2009-02-16 | Electronic component |
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EP (1) | EP2187435B1 (ja) |
JP (1) | JP5277755B2 (ja) |
KR (1) | KR101101562B1 (ja) |
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EP2187435A1 (en) | 2010-05-19 |
CN101785097A (zh) | 2010-07-21 |
CN101785097B (zh) | 2011-11-30 |
KR101101562B1 (ko) | 2012-01-02 |
US20100200983A1 (en) | 2010-08-12 |
US8314485B2 (en) | 2012-11-20 |
JP5277755B2 (ja) | 2013-08-28 |
JP2010016030A (ja) | 2010-01-21 |
KR20100031547A (ko) | 2010-03-22 |
EP2187435B1 (en) | 2017-04-12 |
EP2187435A4 (en) | 2013-11-13 |
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