Source: http://www.google.com/patents/US7186928?dq=6370535
Timestamp: 2014-12-19 23:49:10
Document Index: 521292250

Matched Legal Cases: ['art 1', 'art 1', 'art 1', 'art 1', 'art 3', 'art 1', 'art 1', 'art 1', 'arts 1']

Patent US7186928 - Electronic device including chip parts and a method for manufacturing the same - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a shielding configuration of a chip part, a shielding effect and a cooling effect are sufficiently obtained at the same time. In an electronic device including a chip part to be disclosed, a shielding conductor includes a ceiling plate section covering the chip part and side plate sections which are...http://www.google.com/patents/US7186928?utm_source=gb-gplus-sharePatent US7186928 - Electronic device including chip parts and a method for manufacturing the sameAdvanced Patent SearchPublication numberUS7186928 B2Publication typeGrantApplication numberUS 10/522,686PCT numberPCT/JP2003/009807Publication dateMar 6, 2007Filing dateAug 1, 2003Priority dateAug 1, 2002Fee statusPaidAlso published asUS20050248909Publication number10522686, 522686, PCT/2003/9807, PCT/JP/2003/009807, PCT/JP/2003/09807, PCT/JP/3/009807, PCT/JP/3/09807, PCT/JP2003/009807, PCT/JP2003/09807, PCT/JP2003009807, PCT/JP200309807, PCT/JP3/009807, PCT/JP3/09807, PCT/JP3009807, PCT/JP309807, US 7186928 B2, US 7186928B2, US-B2-7186928, US7186928 B2, US7186928B2InventorsHideo Kikuchi, Junichi SasakiOriginal AssigneeNec CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (15), Classifications (69), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetElectronic device including chip parts and a method for manufacturing the sameUS 7186928 B2Abstract In a shielding configuration of a chip part, a shielding effect and a cooling effect are sufficiently obtained at the same time. In an electronic device including a chip part to be disclosed, a shielding conductor includes a ceiling plate section covering the chip part and side plate sections which are formed to be united with the ceiling plate section and to be at a position lower than the ceiling plate section and which are arranged on both sides in a horizontal direction of the chip part, and openings are formed in both side ends in a front-rear direction of the shielding conductor to open both sides in a front-rear direction of the chip part, and the side plate sections of the shielding conductor are electrically connected via a plurality of shielding bumps in the front-rear direction to a ground layer pattern of a mounting substrate.
TECHNICAL FIELD The present invention relates to an electronic device including chip parts and a method of manufacturing the same, and in particular, to an electronic device including chip parts and a method of manufacturing the same in which Electro-magnetic Interference (EMI) for the chip parts is reduced.
RELATED ART In an electronic device including chip parts which is constructed by mounting various chip parts such as a semiconductor chip, a chip capacitor, and a chip resistor on a mounting substrate, it is common practice that the chip parts are electromagnetically shielded to reduce EMI, that is, to obtain an effect of shielding the chip parts from radiation noise.
PROBLEM TO BE SOLVED BY THE INVENTION However, in the electronic devices including chip parts according to the first to third prior arts, there exists a problem of difficulty to simultaneously and sufficiently obtain the shielding effect and the cooling effect.
DISCLOSURE OF THE INVENTION To achieve the objects, there is provided an electronic device including a shielding conductor to be united with a chip part, characterized in that an upper surface of the chip part is coated with the shielding conductor, the shielding conductor includes a ceiling plate section covering the chip part and side plate sections which are formed to be united with the ceiling plate section and to be at a position lower than the ceiling plate section and which are arranged on both sides in a horizontal direction of the chip part, side plates do not exist in both side ends in a front-rear direction of the shielding conductor, and the side plate sections are electrically connected via a plurality of connecting means to a ground layer of a mounting substrate.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a configuration of a conventional electronic device including chip parts (first prior art).
FIG. 5 is a cross-sectional view taken along A�A of FIG. 4.
FIG. 15 is a cross-sectional view taken along B�B of FIG. 14.
FIG. 18 is a cross-sectional view taken along C�C of FIG. 17.
FIG. 20 is a cross-sectional view taken along D�D of FIG. 19.
FIG. 22 is a cross-sectional view taken along E�E of FIG. 21.
BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the drawings, description will be given of embodiments of the present invention. The description will be specifically given by use of embodiments.
FIG. 4 is a plan view showing a first embodiment of an electronic device including chip parts of the present invention. FIG. 5 is a cross-sectional view taken along A�A of FIG. 4. FIG. 6 is a process chart showing a first manufacturing method of the electronic device in a process order. FIG. 7 is a process chart showing a second manufacturing method of the electronic device in a process order.
Radiation noise ( relative quantity ) = exp { - π ( W - 0.4 L ) � 1.2 L 2 - ( 2 f c ) 2 } According to the approximate expression, when the side plate sections are disposed in the front-rear direction of the wave-source-conductor loop P and the shielding conductor height H is 0.5 mm, the (front-end) shielding conductor length L is 1.5 mm, and the shielding conductor width W is 1.5 mm, the reduction ratio of the radiation noise (relative quantity) is only one tenth. However, in a case in which the shielding conductor height H is 0.5 mm and the (front-end) shielding conductor length L is kept 1.5 mm, when the shielding conductor width W is increased to 3.5 mm, the radiation noise (relative quantity) is reduced to one thousandth. To obtain a sufficient shielding effect regardless of the direction of the wave-source-conductor loop P, it is required to widen the shielding conductor width W to be at least twice the shielding conductor length L. Since the chip part 1 is originally small in size, it is also possible that the length of the chip part 1 is set to that of the shielding conductor and the shielding conductor 3 has a contour in which the width thereof is at least twice that of the length thereof. That is, the shielding conductor 3 can be designed such that each distance from the area in which the electrodes of the wave-source-conductor loop P exist to the opening end of the shielding conductor 3 equal to or more than the length of shielding conductor 3 so that the radiation noise is sufficiently reduced regardless of the direction of the wave-source-conductor loop P.
FIG. 14 is a cross-sectional view showing a third variation of the electronic device including chip parts of the example, and FIG. 15 is a cross-sectional view taken along B�B of FIG. 14. The third variation remarkably differs from that of the first embodiment described above in that a conductor having elasticity is used in place of the shielding bumps.
FIG. 17 is a cross-sectional view showing a fifth variation of the electronic device including chip parts of the example, and FIG. 18 is a cross-sectional view taken along C�C of FIG. 17. The configuration of the fifth variation remarkably differs from that of the first embodiment described above in that the rear surface of the chip part is pushed by spring force of the shielding conductor.
In the electronic device including chip parts of the fifth variation as shown in FIGS. 17 and 18, there is used as the shielding conductor 3 to cover the chip part 1 a shape memory alloy such as a nickel-titanium (Ni�Ti) alloy which restores a characteristic of a spring when heated; and by forming a hole section 20 in the ceiling plate section of the shielding conductor, end sections 1A of the chip part 1 are pushed by the spring characteristic of a projection part 3A projecting into the hole section 20. For the insertion and removal of the chip part 1 into and from the mounting substrate 10, the shape memory metal undergoes plastic deformation to insert and to remove the chip part 1 into and from the mounting substrate 10 through the hole section 20. As a result, at occurrence of a defect in the chip part 1, the part replacement can be simply conducted. Moreover, by disposing the hole section 20 at a plurality of positions, it is possible to push a plurality of chip parts 1 by one shielding conductor 3.
FIG. 19 is a plan view showing a second embodiment of the electronic device including chip parts in accordance with the present invention and FIG. 20 is a cross-sectional view taken along D�D of FIG. 19. The configuration of the second embodiment remarkably differs from that of the first embodiment described above in that an array-shaped chip part in which a plurality of two-terminal chip parts are integrated is used as the chip part. To the array-shaped chip part, an array-shaped photodiode, an array-shaped signal amplifier circuit, or the like is applicable.
FIG. 21 is a plan view showing a third embodiment of the electronic device including chip parts in accordance with the present invention and FIG. 22 is a cross-sectional view taken along E�E of FIG. 21. The configuration of the third embodiment remarkably differs from that of the second embodiment described above in that in the configuration including an array-shaped chip part in which a plurality of two-terminal chip parts are integrated is used as the chip part, an optical waveguide is arranged in the horizontal direction to input and to guide an optical signal from a light emitting section. In this connection, it is assumed that in the two-terminal chip part used in this example, the cathode electrode is formed only on the rear surface, and only the anode electrode is formed on the mounting surface.
INDUSTRIAL APPLICABILITY As described above, in accordance with the electronic device including chip parts of this invention, in the configuration in which the chip part is mounted on the surface of the mounting substrate, the upper surface of the chip part is coated with the shielding conductor, and the shielding conductor is electrically connected to the ground layer of the mounting substrate; the shielding conductor includes a ceiling plate section covering the chip part and side plate sections which are formed to be united with the ceiling plate section and to be at a position lower than the ceiling plate section and which are arranged on both sides in the horizontal direction of the chip part; furthermore, in the both side ends in the front-rear direction of the shielding conductor, openings are formed to open the both sides in the front-rear direction of the chip part, and the side plate sections of the shielding conductor are electrically connected via a plurality of connecting units in the front-rear direction to the ground layer of the mounting substrate. Therefore, although the both side ends in the front-rear direction of the shielding conductor are opened, the shielding effect can be increased by widening the width of the ceiling plate section.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleEP0812015A1Jun 3, 1997Dec 10, 1997MAGNETI MARELLI S.p.A.A heat dissipator for integrated circuitsEP1146591A2Apr 6, 2001Oct 17, 2001Hitachi, Ltd.Electromagnetic wave absorber, method of manufacturing the same and appliance using the sameJP2940478B2 Title not availableJP2001015976A Title not availableJP2001036197A Title not availableJPH02113341A Title not availableJPH02244661A Title not availableJPH09307273A Title not availableReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7989928Jun 22, 2009Aug 2, 2011Advanced Semiconductor Engineering Inc.Semiconductor device packages with electromagnetic interference shieldingUS8022511 *Dec 16, 2008Sep 20, 2011Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8030750Nov 19, 2009Oct 4, 2011Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8093690Mar 31, 2009Jan 10, 2012Advanced Semiconductor Engineering, Inc.Chip package and manufacturing method thereofUS8110902Feb 19, 2009Feb 7, 2012Advanced Semiconductor Engineering, Inc.Chip package and manufacturing method thereofUS8212339Apr 29, 2010Jul 3, 2012Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8212340Jul 13, 2009Jul 3, 2012Advanced Semiconductor Engineering, Inc.Chip package and manufacturing method thereofUS8350367Dec 16, 2008Jan 8, 2013Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8368185Nov 19, 2009Feb 5, 2013Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8410584Apr 29, 2009Apr 2, 2013Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8541883Nov 29, 2011Sep 24, 2013Advanced Semiconductor Engineering, Inc.Semiconductor device having shielded conductive viasUS8592958Dec 8, 2011Nov 26, 2013Advanced Semiconductor Engineering, Inc.Chip package and manufacturing method thereofUS8653633Jul 5, 2011Feb 18, 2014Advanced Semiconductor Engineering, Inc.Semiconductor device packages with electromagnetic interference shieldingUS8653634Jun 11, 2012Feb 18, 2014Advanced Semiconductor Engineering, Inc.EMI-shielded semiconductor devices and methods of makingUS8786060May 4, 2012Jul 22, 2014Advanced Semiconductor Engineering, Inc.Semiconductor package integrated with conformal shield and antenna* Cited by examinerClassifications U.S. Classification174/350, 174/390, 257/E23.021, 257/E23.114, 257/E21.511, 174/377International ClassificationH01L23/552, H05K1/02, H01L23/485, H05K1/18, H05K9/00, H01S5/022, H01L23/00, H01L21/60, H01G4/228, H01C1/06, H01G2/22Cooperative ClassificationH01L2924/19043, H01L24/81, H01L2224/83851, H01L23/552, H01L2924/01082, H01L2924/01033, H01L2224/81201, H01G4/228, H01L2224/1703, H05K1/0218, H01L2924/01004, H05K1/181, H01L2924/01006, H01L2224/13099, H01L2224/8121, H01L2224/131, H01G2/22, H01L2924/16152, H01L2224/73253, H01L2924/01079, H05K2201/10734, H01L2224/16, H01L2924/01002, H01L2924/19105, H01L2224/17515, H01L2924/01013, H01L2224/81815, H01L2924/3025, H05K2201/10371, H01L2924/01024, H01L2224/92225, H01L2924/01022, H01L2924/19041, H01L2924/01005, H01L24/10, H01L2924/01015, H01C1/06, H01L2224/73153, H01L2924/09701, H01L2924/15192, H01L2924/01074, H01L2924/01029, H01L2924/014, H01L2924/0001, H01L2224/14051European ClassificationH01L24/10, H01L24/81, H01G4/228, H05K1/02C2B, H01C1/06, H01G2/22, H01L23/552Legal EventsDateCodeEventDescriptionAug 11, 2010FPAYFee paymentYear of fee payment: 4Apr 12, 2005ASAssignmentOwner name: NEC CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIKUCHI, HIDEO;SASAKI, JUNICHI;REEL/FRAME:016795/0207Effective date: 20050307RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google