With Separate Tie Bar Element Or Plural Tie Bars Patents (Class 257/670)
  • Patent number: 7948091
    Abstract: A mounting structure for a semiconductor element is disclosed. The semiconductor element is bonded to a die pad through an adhesive film, which is formed by applying a predetermined amount of a paste adhesive onto the surface of the die pad and placing the semiconductor element on the die pad so as to press and spread the adhesive between the lower surface of the semiconductor element and the die pad. A wire extends between the semiconductor element and a terminal pad disposed around the die pad. The die pad includes plural grooves in the surface thereof. Each of the grooves extends from the center of the die pad toward a peripheral edge of the die pad and ends at the inner side of the peripheral edge of the die pad.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: May 24, 2011
    Assignees: Fujitsu Component Limited, Fujitsu Limited
    Inventors: Yuko Ohse, Osamu Daikuhara, Hideki Takauchi
  • Patent number: 7947534
    Abstract: An integrated circuit package system is provided including: forming a plurality of leads with a predetermined thickness and a predetermined interval gap between each of the plurality of leads; configuring each one of the plurality of leads to include first terminal ends disposed adjacent an integrated circuit and second terminal ends disposed along a periphery of a package; and forming the second terminal ends of alternating leads disposed along the periphery of the package to form an etched lead-to-lead gap in excess of the predetermined interval gap.
    Type: Grant
    Filed: February 4, 2006
    Date of Patent: May 24, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Jeffrey D. Punzalan, Henry D. Bathan, Il Kwon Shim, Keng Kiat Lau
  • Patent number: 7943961
    Abstract: A semiconductor structure includes an active region; a gate strip overlying the active region; and a metal-oxide-semiconductor (MOS) device. A portion of the gate strip forms a gate of the MOS device. A portion of the active region forms a source/drain region of the MOS device. The semiconductor structure further includes a stressor region over the MOS device; and a stressor-free region inside the stressor region and outside the region over the active region.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: May 17, 2011
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yen-Sen Wang, Chung-Te Lin, Min Cao, Sheng-Jier Yang
  • Patent number: 7944032
    Abstract: A variety of improved arrangements and processes for packaging integrated circuits are described. More particularly, methods of encapsulating dice in lead frame based IC packages are described that facilitate covering some portions of the bottom surface of the lead frame while leaving other portions of the bottom surface of the lead frame exposed. In some embodiments, a method of encapsulating integrated circuits mounted on a lead frame panel is described. The lead frame panel includes a plurality of leads having associated contacts and supports. A shim having a plurality of cavities is positioned under the lead frame such that the cavities are adjacent to the supports and not adjacent to the contacts. During the encapsulation process, encapsulant material flows under the supports such that the bottom surfaces of the supports are electrically insulated by the encapsulant while the bottom surfaces of the contacts remain exposed.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: May 17, 2011
    Assignee: National Semiconductor Corporation
    Inventor: Jaime A. Bayan
  • Patent number: 7944031
    Abstract: Chip scale semiconductor packages and methods for making and using the same are described. The chip scale semiconductor packages comprise a leadframe supporting a die that contains a discrete device. The chip scale semiconductor device also contains and an interconnect structure that also serves as a land for the package. The leadframe contains a topset feature adjacent a die attach pad supporting the die, a configuration which provides a connection to the interconnect structure as well as the backside of the die. This leadframe configuration provides a maximum die size to be used in the chip scale semiconductor packages while allowing them to be used in low power and ultra-portable electronic devices. Other embodiments are described.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: May 17, 2011
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Manolito Galera, Leocadio Morona Alabin
  • Publication number: 20110108963
    Abstract: A package for a semiconductor die includes a die attach pad that provides an attachment surface area for the semiconductor die, and tie bars connected to the die attach pad. The die attach pad is disposed in a first general plane and the tie bars are disposed in a second general plane offset with respect to the first general plane. A molding compound encapsulates the semiconductor die in a form having first, second, third and fourth lateral sides, a top and a bottom. The tie bars are exposed substantially coincident with at least one of the lateral sides. The form includes a discontinuity that extends along the at least one of the lateral sides, the discontinuity increasing a creepage distance measured from the tie bars to the bottom of the package.
    Type: Application
    Filed: December 10, 2010
    Publication date: May 12, 2011
    Applicant: Power Integrations, Inc.
    Inventors: Balu Balakrishnan, Brad L. Hawthorne, Stefan Bäurle
  • Patent number: 7936053
    Abstract: An integrated circuit package system includes forming lead structures including a dummy tie bar having an intersection with an outer edge of the integrated circuit package system, and connecting an integrated circuit die to the lead structures.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: May 3, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Jeffrey D. Punzalan, Henry D. Bathan, Il Kwon Shim, Zigmund Ramirez Camacho
  • Patent number: 7935575
    Abstract: In one embodiment, a semiconductor package is formed to include a leadframe that includes a plurality of die attach areas for attaching a semiconductor die to the leadframe. The leadframe is positioned to overlie another leadframe that forms some of the external terminals or leads of the package.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: May 3, 2011
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Stephen St. Germain, Roger M. Arbuthnot, Frank Tim Jones
  • Patent number: 7928544
    Abstract: The invention relates to leadframes and semiconductor chip package assemblies using leadframes, and to methods for their assembly. A disclosed embodiment of the invention includes a semiconductor package leadframe with a chip mounting surface for receiving a semiconductor chip and a plurality of leadfingers. The leadfingers have a proximal end for receiving one or more wirebond, and a distal end for providing an electrical path from the proximal end. One or more of the leadfingers also has an offset portion at its proximal end for increasing the clearance between the leadfinger and underlying heat spreader, increasing the stiffness of the leadfinger, and increasing leadfinger deflection-resistance and spring-back. The offset is in the direction opposite the plane of a heat spreader thermally coupled to the mounting surface.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: April 19, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Chien-Te Feng, Yuan-Pao Cheng, Li-Chaio Chou
  • Patent number: 7923824
    Abstract: The present invention provides microelectronic component assemblies and lead frame structures that may be useful in such assemblies. For example, one such lead frame structure may include a set of leads extending in a first direction and a dam bar. Each of the leads may have an outer length and an outer edge. The dam bar may include a plurality of dam bar elements, with each dam bar element being joined to the outer lengths of two adjacent leads. In this example, each dam bar element has an outer edge that extends farther outwardly than the outer edges of the two adjacent leads. The outer edges of the leads and the outer edges of the dam bar elements together define an irregular outer edge of the dam bar. Other lead frame structures and various microelectronic component assemblies are also shown and described.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: April 12, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Mark S. Johnson
  • Patent number: 7919838
    Abstract: A method of manufacture of an integrated circuit package system includes forming a paddle having a paddle top surface, the paddle top surface having a depression provided therein, forming an external interconnect having a lead tip and a lead body with the lead body having a first recess segment along a length-wise dimension of the lead body, connecting a device over the paddle top surface and the external interconnect, and filling a substantially electrically nonconductive material in the depression.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: April 5, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Byung Tai Do, Sung Uk Yang
  • Patent number: 7915719
    Abstract: A semiconductor device comprises: a first and second die pads arranged side by side; a plurality of inner leads arranged around the first and second die pads; first and second chips mounted on the first and second die pads; a bar provided between the first and second chips and the plurality of inner leads, extending in an array direction of the first chip and the second chip; a plurality of wires that connect the first and second chips and the plurality of inner leads and connect the first chip and the second chip; and resin that seals the first and second die pads, the plurality of inner leads, the first and second chips, the plurality of wires and the bar, wherein the bar comprises a mark provided at a position corresponding to an area between the first chip and the second chip in an array direction of the first chip and the second chip.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: March 29, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuyuki Misumi, Kazushi Hatauchi
  • Patent number: 7911040
    Abstract: An integrated circuit package system comprising: providing an integrated circuit die; forming a top paddle over the integrated circuit die wherein the top paddle has planar dimensions smaller than planar dimensions of the integrated circuit die; forming leads adjacent the top paddle; attaching first connectors to the integrated circuit die and the top paddle; attaching second connectors to the integrated circuit die and the leads; and forming an encapsulant over the first connectors, the second connectors, the integrated circuit die, and the top paddle.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: March 22, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Lionel Chien Hui Tay, Henry Descalzo Bathan, Zigmund Ramirez Camacho
  • Publication number: 20110062567
    Abstract: A leadframe including a die pad, leads, an outer frame, connecting bars and grounding bars is provided. Each of the grounding bars is suspended between two connecting bars by being connected with branches of the two connecting bars, such that the grounding bars are spaced by the die pad. The leadframe and the chip package of the present invention can permit a great design variation.
    Type: Application
    Filed: August 19, 2010
    Publication date: March 17, 2011
    Applicant: ADVANCED SEMICONDUCTOR ENGINEERING, INC.
    Inventors: Yueh-Chen Hsu, Mei-Lin Hsieh, Chih-Hung Hsu, Kuang-Hsiung Chen, Yi-Cheng Hsu
  • Patent number: 7902655
    Abstract: Embodiments of the present invention provide electrical bussing for multichip leadframes. In various embodiments, a leadframe may comprise a first die paddle for receiving a first microelectronic device, a second die paddle for receiving a second microelectronic device, and at least one electrical bus disposed between the first die paddle and the second die paddle. In various ones of these embodiments, the electrical bus may be configured to supply a potential to at least one of the first and second microelectronic devices.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: March 8, 2011
    Assignee: Marvell International Ltd.
    Inventor: Michael D. Cusack
  • Patent number: 7898067
    Abstract: Semiconductor packages that contain multiple dies and methods for making such packages are described. The semiconductor packages contain a leadframe with multiple dies and also contain a single premolded clip that connects the dies. The premolded clip connects the solderable pads of the source die and gate die to the source and gate of the leadframe via standoffs. The solderable pads on the dies and on the standoffs provide a substantially planar surface to which the premolded clip is attached. Such a configuration increases the cross-sectional area of the interconnection when compared to wirebonded connections, thereby improving the electrical (RDSon) and the thermal performance of the semiconductor package. Such a configuration also lowers costs relative to similar semiconductor packages that use wirebonded connections. Other embodiments are described.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 1, 2011
    Inventor: Armand Vincent C. Jereza
  • Patent number: 7888185
    Abstract: Semiconductor device assemblies and systems that include at least one semiconductor device assembly include two or more semiconductor devices stacked one over another. Conductive pathways that extend around at least one side of at least one of the semiconductor devices provide electrical communication between conductive elements of the semiconductor devices, and optionally, a substrate. The conductive pathways may include self-supporting conductive leads or conductive traces carried by a substrate. Methods for forming semiconductor device assemblies having more than one semiconductor device include bending or wrapping at least one conductive pathway around a side of at least one semiconductor device and providing electrical communication between semiconductor devices of the assembly through the conductive pathways.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 15, 2011
    Assignee: Micron Technology, Inc.
    Inventors: David J. Corisis, Chin Hui Chong, Choon Kuan Lee
  • Patent number: 7875963
    Abstract: In accordance with the present invention, there is provided a semiconductor package (e.g., a QFP package) including a uniquely configured leadframe sized and configured to maximize the available number of exposed leads in the semiconductor package. More particularly, the semiconductor package includes a generally planar die pad or die paddle defining multiple peripheral edge segments. In addition, the semiconductor package includes a plurality of leads. Some of these leads include bottom surface portions which, in the completed semiconductor package, are exposed and at least partially circumvent the die pad, with other leads including portions which protrude from respective side surfaces of a package body in the completed semiconductor package. The semiconductor package also includes one or more power bars and/or one or more ground rings which are integral portions of the original leadframe used to fabricate the same.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: January 25, 2011
    Assignee: Amkor Technology, Inc.
    Inventors: Gi Jeong Kim, Yeon Ho Choi
  • Patent number: 7875962
    Abstract: A package for a semiconductor die includes a die attach pad that provides an attachment surface area for the semiconductor die, and tie bars connected to the die attach pad. The die attach pad is disposed in a first general plane and the tie bars are disposed in a second general plane offset with respect to the first general plane. A molding compound encapsulates the semiconductor die in a form having first, second, third and fourth lateral sides, a top and a bottom. The tie bars are exposed substantially coincident with at least one of the lateral sides. The form includes a discontinuity that extends along the at least one of the lateral sides, the discontinuity increasing a creepage distance measured from the tie bars to the bottom of the package.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: January 25, 2011
    Assignee: Power Integrations, Inc.
    Inventors: Balu Balakrishnan, Brad L. Hawthorne, Stefan Bäurle
  • Patent number: 7875968
    Abstract: Leadframe for a semiconductor package and manufacturing from such leadframe including a plurality of connection leads supported in a frame. Die mounting plate is centrally located in the leadframe and is supported by a plurality of support leads which are electrically connected to the die mounting pad and extending in a direction outwardly therefrom towards the frame. Each support lead is formed with a connection pad portion and a down set link portion. Each connection pad portion is spaced from the die mounting plate and is connected to a conductive bonding ground wire from a semiconductor device mounted on the die mounting plate. Each down set link portion is electrically connected to the die mounting pad and supports the die mounting pad in a spaced arrangement from the connection leads. The connection pad portion and the down set link portion overlap, in the direction of extension of the support lead.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: January 25, 2011
    Assignee: Infineon Technologies AG
    Inventors: Wu Hu Li, Mohamad Yazid Wagiman, Min Wee Low
  • Patent number: 7872345
    Abstract: An integrated circuit package system includes: providing a protective layer having an opening; forming a conductive layer over the protective layer and filling the opening; patterning a rigid locking lead, having both a lead locking portion and a lead exposed portion, from the conductive layer; connecting an integrated circuit and the rigid locking lead; and forming an encapsulation over the integrated circuit with the lead locking portion in the encapsulation and the lead exposed portion exposed from the encapsulation.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: January 18, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Seng Guan Chow, Linda Pei Ee Chua, Heap Hoe Kuan
  • Patent number: 7868432
    Abstract: A multi-chip module suitable for use in a battery protection circuit. The multi-chip module includes an integrated circuit chip, a first power transistor, a second power transistor, a first connection structure electrically coupling the integrated circuit chip to the first power transistor, a second connection structure electrically coupling the integrated circuit chip to the second power transistor, and a leadframe structure comprising a first lead, a second lead, a third lead and a fourth lead, wherein the integrated circuit chip, the first power transistor, and the second power transistor are mounted on the leadframe structure. A molding material covers at least part of the integrated circuit chip, the first power transistor, the second power transistor, the first connection structure, and the second connection structure.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: January 11, 2011
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jeongil Lee, Myoungho Lee, Bigildis Dosdos, Charles Suico, Lee Man Fai Edwin, David Chong Sook Lim, Adriano M. Vilas-Boas
  • Patent number: 7868434
    Abstract: An integrated circuit package-on-package stacking system includes a leadframe interposer including: a leadframe having a lead; a molded base on a portion of the lead for only supporting the lead; and the leadframe interposer singulated from the leadframe, wherein the lead is bent to support a stack-up height.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: January 11, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Dioscoro A. Merilo, Heap Hoe Kuan, You Yang Ong, Seng Guan Chow, Ma. Shirley Asoy
  • Patent number: 7863737
    Abstract: An integrated circuit package system including providing a plurality of substantially identical package leads formed in a single row, and attaching bond wires having an offset on adjacent locations of the package leads.
    Type: Grant
    Filed: April 1, 2006
    Date of Patent: January 4, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Byoung Wook Jang, Hun Teak Lee, Kwang Soon Hwang
  • Patent number: 7863108
    Abstract: A method of manufacture of an integrated circuit packaging system is provided including: forming a D-ring includes half etching a paddle, etching a ring, and etching a tie bar. The tie bar is between the paddle and the ring. The system further includes mounting an integrated circuit die on a central portion of the D-ring, connecting the integrated circuit die and the D-ring, and encapsulating the integrated circuit die and a portion of the D-ring.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: January 4, 2011
    Assignee: Stats Chippac Ltd.
    Inventors: Antonio B. Dimaano, Jr., Il Kwon Shim, Sheila Rima C. Magno
  • Publication number: 20100314729
    Abstract: The present invention provides a stacked chip package structure with leadframe having inner leads with transfer pad, comprising: a leadframe composed of a plurality of inner leads arranged in rows facing each other, a plurality of outer leads, and a die pad, wherein the die pad is provided between the plurality of inner leads arranged in rows facing each other and vertically distant from the plurality of inner leads; an offset chip-stacked structure formed with a plurality of chips stacked together, the offest chip-stacked structure being set on the die pad and electrically connected to the plurality of inner leads arranged in rows facing each other; and an encapsulant covering the offset chip-stacked structure and the leadframe, the plurality of outer leads extending out of said encapsulant; the improvement of which being that the inner leads of the leadframe are coated with an insulating layer and a plurality of metal pads are selectively formed on the insulating layer.
    Type: Application
    Filed: August 3, 2010
    Publication date: December 16, 2010
    Inventors: Geng-Shin SHEN, Wu-Chang Tu
  • Patent number: 7847376
    Abstract: A semiconductor device of a multi-pin structure using a lead frame is provided. The semiconductor device comprises a tab having a chip supporting surface, the chip supporting surface whose dimension is smaller than a back surface of a semiconductor chip, a plurality of leads arranged around the tab, the semiconductor chip mounted over the chip supporting surface of the tab, a plurality of suspending leads for supporting the tab, four bar leads arranged outside the tab so as to surround the tab and coupled to the suspending leads, a plurality of wires for coupling between the semiconductor chip and the leads, and a sealing body for sealing the semiconductor chip and the wires with resin, with first slits being formed respectively in first coupling portions of the bar leads for coupling with the suspending leads.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: December 7, 2010
    Assignee: Renesas Electronics Corporation
    Inventor: Noriyuki Takahashi
  • Patent number: 7843047
    Abstract: A method of manufacturing a semiconductor package system including: forming a leadframe having a passive device; encapsulating the passive device to form an encapsulant interposer; attaching a first die to the encapsulant interposer; forming a substrate interposer having a second die; and stacking the encapsulant interposer over the substrate interposer.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: November 30, 2010
    Assignee: Stats Chippac Ltd.
    Inventors: Heap Hoe Kuan, Rui Huang, Yaojian Lin, Seng Guan Chow
  • Publication number: 20100295172
    Abstract: Disclosed is a power semiconductor module having improved heat dissipation performance, including an anodized metal substrate including a metal plate, an anodized layer formed on a surface of the metal plate, and a circuit layer formed on the anodized layer on the metal plate, a power device connected to the circuit layer, and a housing mounted on the metal plate and for defining a sealing space which accommodates a resin sealing material for sealing the circuit layer and the power device.
    Type: Application
    Filed: August 7, 2009
    Publication date: November 25, 2010
    Inventors: Shan Gao, Seog Moon Choi, Do Jae Yoo, Tae Hyun Kim, Bum Sik Jang, Ji Hyun Park
  • Patent number: 7839003
    Abstract: While a semiconductor device is provided with a plurality of element electrodes 5 formed on a semiconductor element 4 and a plurality of lead terminal electrodes 6 formed on a lead frame, the semiconductor device is equipped with a coupling conductor which electrically connects at least one electrode among the above-described element electrodes 5 to at least one electrode among the above-described lead terminal electrodes 6; the above-described coupling conductor is manufactured by a first conductor 1 and a second conductor 2, the major components of which are metals; the first conductor 1 has been electrically connected to the second conductor 2; and the element electrodes 5 and the lead terminal electrodes 6 have been electrically connected to the second conductor 2 respectively.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: November 23, 2010
    Assignee: Panasonic Corporation
    Inventors: Mitsuhiro Hamada, Kouichi Tomita
  • Patent number: 7838974
    Abstract: Particular embodiments of the present invention provide a leadframe suitable for use in packaging IC dice that enables stress reduction in and around the die, die attach material, die attach pad and mold interfaces. More particularly, various leadframes are described that include recesses in selected regions of the top surface of the die attach pad.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: November 23, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Anindya Poddar, Lianxi Shen
  • Publication number: 20100289128
    Abstract: A method of manufacture of an integrated circuit packaging system includes: conductively bonding a first surface of a transposer to an inner end of a lead separate from the transposer; conductively bonding a die to the first surface of the transposer; and encapsulating the inner end with a mold compound having a bottom mold surface that is exposed and is coplanar with a surface of the transposer opposite the first surface.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 18, 2010
    Inventors: Zigmund Ramirez Camacho, Henry Descalzo Bathan, Arnel Senosa Trasporto
  • Patent number: 7821112
    Abstract: A semiconductor device having linear zigzag(s) for wire bonding is revealed, primarily comprising a chip, a plurality of leads made of a lead frame and a plurality of bonding wires electrically connecting the chip and the leads. At least one of the leads has a linear zigzag including a first finger and a second finger connected each other in a zigzag form. One end of one of the bonding wire is bonded to a bonding pad on the chip and the other end is selectively bonded to either the first finger or the second finger but not both in a manner that the wire-bonding direction of the bonding wire is parallel to or in a sharp angle with the direction of the connected fingers for easy wire bonding processes. Therefore, the semiconductor device can assemble chips with diverse dimensions or with diverse bonding pads layouts by flexible wire-bonding angles at linear zigzag to avoid electrical short between the adjacent leads.
    Type: Grant
    Filed: March 9, 2008
    Date of Patent: October 26, 2010
    Assignee: Powertech Technology Inc
    Inventors: Wen-Jeng Fan, Yu-Mei Hsu
  • Patent number: 7820480
    Abstract: A redistributed lead frame for use in a molded plastic semiconductor package (38) is formed from an electrically conductive substrate by a sequential metal removal process. The process includes: (a) patterning a first side of an electrically conductive substrate to form an array of lands separated by channels, (b) disposing a first molding compound (18) within these channels, (c) patterning a second side of the electrically conductive substrate to form an array of chip attach sites (24) and routing circuits (26) electrically interconnecting the array of lands and the array of chip attach sites (24), (d) directly electrically interconnecting input/output pads on the at least one semiconductor device (28) to chip attach site members (24) of the array of chip attach sites (24), and (e) encapsulating the at least one semiconductor device (28), the array of chip attach sites (24) and the routing circuits (26) with a second molding compound (36).
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: October 26, 2010
    Assignee: Unisem (Mauritius) Holdings Limited
    Inventors: Shafidul Islam, Romarico Santos San Antonio, Anang Subagio
  • Publication number: 20100264527
    Abstract: The present invention provides a chip-stacked package structure with leadframe having bus bar, comprising: a leadframe composed of a plurality of inner leads arranged in rows facing each other, a plurality of outer leads, and a die pad, wherein the die pad is provided between the plurality of inner leads and is vertically distant from the plurality of inner leads; a chip-stacked structure formed with a plurality of chips that stacked together and set on the die pad, the plurality of chips and the plurality of inner leads being electrically connected with each other; and an encapsulant covering over the chip-stacked package structure and the leadframe, in which the leadframe comprises at least a bus bar, which is provided between the plurality of inner leads arranged in rows facing each other and the die pad.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Inventors: Geng-Shin SHEN, Wu-Chang Tu
  • Patent number: 7816778
    Abstract: A device is disclosed which includes a flexible material including at least one conductive wiring trace, a first die including at least an integrated circuit, the first die being positioned above a portion of the flexible material, and an encapsulant material that covers the first die and at least a portion of the flexible material. A method is disclosed which includes positioning a first die above a portion of a flexible material, the first die including an integrated circuit and the flexible material including at least one conductive wiring trace, and forming an encapsulant material that covers the first die and at least a portion of the flexible material, wherein at least a portion of the flexible material extends beyond the encapsulant material.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: October 19, 2010
    Assignee: Micron Technology, Inc.
    Inventors: Choon Kuan Lee, Chong Chin Hui, David J. Corisis
  • Patent number: 7816186
    Abstract: A method to manufacture a package that encases at least one integrated circuit device and the package so manufactured. The method includes the steps of (1) providing a leadframe having a die pad, leads, at least one ring circumscribing the die pad and disposed between the die pad and the leads, a plurality of tie bars projecting outwardly from the at least one ring, and at least one connecting bar electrically interconnecting and mechanically supporting the die pad to the ring; (2) affixing the at least one integrated circuit device to a first side of the die pad and electrically interconnecting the at least one integrated circuit device to the leads and to the at least one ring; (3) encapsulating the at least one integrated circuit device, the first side of the die pad and a first side of the ring in a molding resin while retaining an opposing second side of the ring external to said molding resin; and (4) severing the at least one connecting bar to electrically isolate the die pad from the ring.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: October 19, 2010
    Assignee: Unisem (Mauritius) Holdings Limited
    Inventors: Romarico S. San Antonio, Anang Subagio
  • Patent number: 7812431
    Abstract: A leadframe includes a die pad and a plurality of leads corresponding to the die pad. The die pad for supporting a die is formed with a plurality of sides, each of the sides having at least one recess portion and at least one protrusion portion. The leads are substantially coplanar to the die pad. The leads include a plurality of first leads and a plurality of second leads. The first leads extend into the recess portions respectively, and the second leads are aligned with the protrusion portions. The length of the first leads is greater than that of the second leads. The length of wires electrically connecting the die to the leads or the die pad can be adjusted by the sides of the leadframe with the recess portion and the protrusion portion having a dimension corresponding to the leads, so as to save the manufacture cost of the leadframe.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: October 12, 2010
    Assignee: Advanced Semiconductor Engineering, Inc.
    Inventors: Su-Tai Yang, Kuang-Chun Chou, Wen-Chi Cheng
  • Patent number: 7812430
    Abstract: A lead frame with downset baffle paddles and a semiconductor package utilizing the same are revealed. The lead frame primarily comprises a plurality of leads formed on a first plane, a baffle paddle formed on a second plane in parallel, and an internal tie bar formed between the first plane and the second plane. The internal tie bar has at least two or more windings such as “S” shaped to flexibly connect the baffle paddle to an adjacent one of the leads. Therefore, the internal tie bar can reduce the shifting and twisting of the connected lead during the formation of the downset of the baffle paddle.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: October 12, 2010
    Assignee: Powertech Technology Inc.
    Inventors: Chin-Fa Wang, Wan-Jung Hsieh, Yu-Mei Hsu
  • Patent number: 7812429
    Abstract: A wire short-circuit defect during molding is prevented. A semiconductor device has a tab, a plurality of leads arranged around the tab, a semiconductor chip mounted over the tab, a plurality of wires electrically connecting the electrode pads of the semiconductor chip with the leads, and a molded body in which the semiconductor chip is resin molded. By further stepwise shortening the chip-side tip end portions of the leads as the first edge or side of the principal surface of the semiconductor chip goes away from the middle portion toward the both end portions thereof, and shortening the tip end portions of those of first leads corresponding to the middle portion of the first edge or side of the principal surface which are adjacent to second leads located closer to the both end portions of the first edge or side, the distances between second wires connected to the second leads and the tip end portions of the first leads adjacent to the second leads can be increased.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: October 12, 2010
    Assignee: Renesas Electronics Corporation
    Inventors: Shigeki Tanaka, Kazuto Ogasawara
  • Patent number: 7808088
    Abstract: A semiconductor device comprises a die having a first surface and a second surface, a first leadframe connected to the first surface and the second surface, and a second leadframe connected to the first surface.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: October 5, 2010
    Assignee: Texas Instruments Incorporated
    Inventor: Bernhard P Lange
  • Patent number: 7808084
    Abstract: Disclosed is a lead frame, a semiconductor device and a fabrication method related to the semiconductor device. Since the lead frame has a land connecting bar, an upper surface of which is half-etched, the land connecting bar is more easily removed by a blade than a conventional land connecting bar in a fabrication process for the semiconductor device. Accordingly, stress applied to the lands when the land connecting bar is removed is reduced, and a flatness of the lands is maintained. Also, first and second lands constituting the lands are alternately formed with the land connecting bar, leads are alternately formed with the second lands, and wire bonding regions of the leads are positioned on a plane higher than the second lands. Accordingly, an interval between the conductive wires can be constantly maintained and the conductive wires have different traces, thus preventing a short between the conductive wires due to wire sweeping in an encapsulation process.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: October 5, 2010
    Assignee: Amkor Technology, Inc.
    Inventors: Chang Deok Lee, Do Hyun Na
  • Patent number: 7808087
    Abstract: Methods and apparatus for improved thermal performance and electromagnetic interference (EMI) shielding in integrated circuit (IC) packages is described. A die-up or die-down package includes first and second caps defining a cavity, an IC die, and a leadframe. The leadframe includes a centrally located die attach pad, a plurality of leads, and a plurality of tie bars that couple the die attach pad to the leads. The IC die is mounted to the die attach pad. Planar rim portions of the first and second caps that surround the cavity are coupled to the leadframe. The first and second caps and the leadframe form an enclosure structure that substantially encloses the IC die, and shields EMI emanating from and radiating towards the IC die. The enclosure structure also dissipates heat generated by the IC die during operation.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Sam Ziqun Zhao, Rezaur Rahman Khan
  • Publication number: 20100244210
    Abstract: Provided are: a lead frame enabling efficient manufacturing of multiple circuit devices; and a method for manufacturing a circuit device using the same. In the lead frame of the present invention, units are arranged and frame-shaped first and second supporters are provided around the units to mechanically support the units. Moreover, a half groove is provided in the first supporter at a portion on an extended line of a dividing line defined at a boundary between each adjacent two of the units. Furthermore, a penetration groove penetrating a part of the second supporter at a portion on an extended line of another dividing line is provided.
    Type: Application
    Filed: March 31, 2009
    Publication date: September 30, 2010
    Applicants: Sanyo Electric Co., Ltd, Sanyo Semiconductor Co., Ltd.
    Inventors: Tetsuya Fukushima, Takashi Kitazawa
  • Publication number: 20100237478
    Abstract: Provided is a lead frame that may include a frame, a lead structure, and a dam bar. The frame may include a plurality of openings configured to receive semiconductor chips. The lead structure may be in the openings. The lead structure may also include inner leads and outer leads. The inner leads may be configured to electrically connect to the semiconductor chips and the outer leads may extend from the inner leads. In example embodiments, the lead structure may extend in a first direction. The dam bar may be arranged between the inner leads and the outer leads. In accordance with example embodiments, the dam bar may extend along a second direction which is substantially perpendicular to the first direction. In example embodiments, the dam bar may have a first strength-reinforcing portion extending along the second direction. Also provided is a semiconductor package having the lead frame.
    Type: Application
    Filed: March 10, 2010
    Publication date: September 23, 2010
    Inventors: Geun-Woo Kim, Ho-Geon Song, Man-Hee Han
  • Patent number: 7795712
    Abstract: An electronic component includes a lead frame, a semiconductor chip and an encapsulating body. The lead frame includes a heat spreader area, a plurality of conductive lead fingers, at least one non-conductive tie bar, and a metal joint. The metal joint connects the at least one non-conductive tie bar to the heat spreader area. The semiconductor chip is provided on a die pad located on the heat spreader area. The encapsulating body covers at least part of the semiconductor chip, at least part of the at least one non-conductive tie bar and part of the lead frame.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: September 14, 2010
    Assignee: Infineon Technologies AG
    Inventors: Alvin Wee Beng Tatt, Fuaida Harun, Soon Hock Tong, Robert-Christian Hagen, Yang Hong Heng, Kean Cheong Lee
  • Patent number: 7786554
    Abstract: The present invention relates to a stress-free lead frame (1) for a semiconductor. The stress-free lead frame (1) is provided with a stress-relief means (15) and an interlocking means (16) at the outer periphery. The stress-relief means (15) is capable of accommodating expansion and compression while the interlocking means (16) take care of shock and vibration during handling to thereby eliminate delamination of the lead frame (10).
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: August 31, 2010
    Assignee: Carsem (M) Sdn. Bhd.
    Inventors: Lee Kock Huat, Chan Boon Meng, Cheong Mun Tuck, Lee Huan Sin, Phuah Kian Keung, Araventhan Eturajulu, Liow Eng Keng, Thum Min Kong, Chen Choon Hing
  • Publication number: 20100213587
    Abstract: One embodiment provides a semiconductor assembly including a printed circuit board and a semiconductor package. The semiconductor package includes a lead frame having a die pad and a plurality of leads spaced from the die pad, a chip attached to the die pad on a front face of the lead frame, at least one electrically conductive structure element mechanically coupled to but electrically isolated from the front face of the lead frame, at least one connector electrically connecting the chip to the structure element, at least one connector electrically connecting the structure element to at least one of the leads, and a mold material encasing the semiconductor package except for an end portion of the leads which are electrically connected to the printed circuit board.
    Type: Application
    Filed: May 5, 2010
    Publication date: August 26, 2010
    Applicant: INFINEON TECHNOLOGIES AG
    Inventors: Thomas Bemmerl, Thomas Mende, Bernd Rakow
  • Publication number: 20100207260
    Abstract: An electronic package is provided. The electronic package comprises a die pad having a die attached thereon. A plurality of leads surrounds the die pad and spaced therefrom to define a ring gap therebetween. At least one first common electrode bar is in the ring gap and substantially coplanar to the die pad, in which at least one of the plurality of leads extends to the first common electrode bar. A molding compound partially encapsulates the die pad and the first common electrode bar, such that the bottom surfaces of the die pad and the first common electrode bar are exposed. A length of the first common electrode bar is substantially equal to a predetermined distance between two pads among a plurality of power or ground pads on a side of the die facing the first common electrode bar. An electronic device with the electronic package is also disclosed.
    Type: Application
    Filed: April 23, 2010
    Publication date: August 19, 2010
    Applicant: MEDIATEK INC.
    Inventors: Nan-Cheng Chen, Nan-Jang Chen, Ching-Chih Li
  • Patent number: 7777328
    Abstract: A substrate includes a inorganic material base board has a recess and at least one penetration hole provided around the recess, and a semiconductor device accommodated in the recess and including at least one electrode pad provided on a surface of the semiconductor device. A resin filling is provided in the at least one penetration hole and has at least one through-hole for electrically connecting a top surface and a back surface of the resin filling. An insulating layer covers the surfaces of the semiconductor device, the resin filling and the inorganic material base board and has a first opening corresponding to the at least one through-hole and a second opening corresponding to the at least one electrode pad. A conductive wiring is formed on a surface of the insulating layer for electrically connecting the at least one through-hole and the at least one electrode pad.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: August 17, 2010
    Assignee: Ibiden Co., Ltd.
    Inventor: Ryo Enomoto