公开(公告)号：US12030138B2

公开(公告)日：2024-07-09

申请号：US17642617

申请日：2020-09-11

Applicant: LIFCO INDUSTRIE

Inventor： Constantin Iacob ,  Sébastien Bucher

IPC: B23K35/02 ,  B23K35/30 ,  H05K1/02 ,  H05K3/34

CPC classification number: B23K35/0222 ,  B23K35/3006 ,  B23K35/302 ,  B23K35/3033 ,  H05K1/0271 ,  H05K3/3436 ,  H05K3/3473 ,  H05K2201/10734 ,  H05K2203/0435

Abstract: The present invention relates to a method for manufacturing composite solder balls that are metallized on the surface and calibrated, these balls comprising a core consisting of a spherical support particle of diameter D0 made of expanded polystyrene and having an intergranular porosity of at least 50%, and a shell covering said support particle and formed by a plurality of metallic surface layers. The present invention also relates to balls that can be obtained by the method according to the invention, as well as to the use thereof for the assembly of electronic boards.

公开(公告)号：US08920934B2

公开(公告)日：2014-12-30

申请号：US13853982

申请日：2013-03-29

Applicant: Hongjin Jiang ,  Arun Kumar C. Nallani ,  Rajen S. Sidhu ,  Martha A. Dudek ,  Weihua Tang

Inventor： Hongjin Jiang ,  Arun Kumar C. Nallani ,  Rajen S. Sidhu ,  Martha A. Dudek ,  Weihua Tang

IPC: B32B5/18 ,  H01L23/498 ,  H01L23/00

CPC classification number: H01L23/49816 ,  H01L21/4853 ,  H01L23/49833 ,  H01L24/16 ,  H01L24/32 ,  H01L24/73 ,  H01L24/81 ,  H01L2224/13101 ,  H01L2224/16225 ,  H01L2224/1703 ,  H01L2224/32245 ,  H01L2224/73253 ,  H01L2924/00011 ,  H01L2924/01322 ,  H01L2924/15311 ,  H01L2924/16235 ,  H01L2924/16251 ,  H01L2924/3511 ,  H05K3/3436 ,  H05K3/3478 ,  H05K3/3484 ,  H05K3/3494 ,  H05K2201/066 ,  H05K2201/068 ,  H05K2201/1056 ,  H05K2203/041 ,  H05K2203/0435 ,  H05K2203/047 ,  Y10S428/929 ,  Y10T428/12181 ,  Y10T428/12479 ,  H01L2924/014 ,  H01L2924/00 ,  H01L2224/81805

Abstract: Hybrid solder for solder balls and filled paste are described. A solder ball may be formed of a droplet of higher temperature solder and a coating of lower temperature solder. This may be used with a solder paste that has an adhesive and a filler of low temperature solder particles, the filler comprising less than 80 weight percent of the paste. The solder balls and paste may be used in soldering packages for microelectronic devices. A package may be formed by applying a solder paste to a bond pad of a substrate, attaching a hybrid solder ball to each pad using the paste, and attaching the package substrate to a microelectronic substrate by reflowing the hybrid solder balls to form a hybrid solder interconnect.

Abstract translation: 描述了用于焊球和填充糊的混合焊料。 焊球可以由较高温度焊料液滴和低温焊料涂层形成。 这可以与具有粘合剂和低温焊料颗粒的填料的焊膏一起使用，填料包含少于膏体的80重量％。 焊球和糊剂可用于微电子器件的焊接封装。 可以通过将焊膏施加到基板的接合焊盘来形成封装，使用该膏将混合焊球附着到每个焊盘，以及通过回流混合焊球来将封装衬底附接到微电子衬底以形成混合焊料 互连。

公开(公告)号：US08436470B2

公开(公告)日：2013-05-07

申请号：US12941894

申请日：2010-11-08

Applicant: Daewoong Suh ,  Stephen E. Lehman ,  Mukul Renavikar

Inventor： Daewoong Suh ,  Stephen E. Lehman ,  Mukul Renavikar

IPC: H01L29/72

CPC classification number: H05K3/3484 ,  H01L24/11 ,  H01L24/13 ,  H01L2224/05001 ,  H01L2224/05023 ,  H01L2224/05144 ,  H01L2224/05147 ,  H01L2224/05155 ,  H01L2224/05164 ,  H01L2224/05568 ,  H01L2224/05647 ,  H01L2224/05655 ,  H01L2224/05669 ,  H01L2224/11 ,  H01L2224/11822 ,  H01L2224/13 ,  H01L2224/13099 ,  H01L2224/13147 ,  H01L2224/136 ,  H01L2224/81011 ,  H01L2924/01015 ,  H01L2924/01027 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01046 ,  H01L2924/01047 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01327 ,  H01L2924/014 ,  H01L2924/14 ,  H01L2924/1433 ,  H05K3/244 ,  H05K3/3436 ,  H05K2201/0215 ,  H05K2201/0341 ,  H05K2203/0435 ,  Y02P70/613 ,  H01L2924/00 ,  H01L2924/00014

Abstract: A microelectronic assembly and method for fabricating the same are described. In an example, a microelectronic assembly includes a microelectronic device having a surface with one or more areas to receive one or more solder balls, the one or more areas having a surface finish comprising Ni. A solder material comprising Cu, such as flux or paste, is applied to the Ni surface finish and one or more solder balls are coupled to the microelectronic device by a reflow process that forms a solder joint between the one or more solder balls, the solder material comprising Cu, and the one or more areas having a surface finish comprising Ni.

Abstract translation: 描述了一种微电子组件及其制造方法。 在一个示例中，微电子组件包括具有一个或多个区域以接收一个或多个焊球的表面的微电子器件，所述一个或多个区域具有包括Ni的表面光洁度。 将包含Cu的焊料材料（例如焊剂或糊料）施加到Ni表面光洁度上，并且一个或多个焊球通过在一个或多个焊球之间形成焊料接头的回流工艺耦合到微电子器件，焊料 包含Cu的材料，并且所述一个或多个区域具有包括Ni的表面光洁度。

公开(公告)号：US20110259627A1

公开(公告)日：2011-10-27

申请号：US13067883

申请日：2011-07-01

Applicant: Hoe-Ku Jung ,  Je-Gwang Yoo ,  Myung-Sam Kang ,  Ji-Eun Kim ,  Jeong-Woo Park ,  Jung-Hyun Park

Inventor： Hoe-Ku Jung ,  Je-Gwang Yoo ,  Myung-Sam Kang ,  Ji-Eun Kim ,  Jeong-Woo Park ,  Jung-Hyun Park

IPC: H05K1/09 ,  H05K1/11

CPC classification number: H05K3/205 ,  H01L21/4846 ,  H01L23/49816 ,  H01L2224/16225 ,  H01L2224/16227 ,  H01L2224/73204 ,  H01L2924/15311 ,  H05K3/4007 ,  H05K2201/09745 ,  H05K2201/10674 ,  H05K2203/0338 ,  H05K2203/0435 ,  Y10T29/49126 ,  Y10T29/49128 ,  Y10T29/49144 ,  Y10T29/49149 ,  Y10T29/49155 ,  Y10T29/49165

Abstract: A circuit board includes: an insulator having a groove; a circuit layer filling a portion of the groove; a solder pad on the circuit layer filling the remainder of the groove; and a circuit pattern electrically connected with the circuit layer, the circuit pattern buried in the insulator such that a portion of the circuit pattern is exposed at a surface of the insulator.

Abstract translation: 电路板包括：具有凹槽的绝缘体; 填充所述凹槽的一部分的电路层; 电路层上的填充凹槽其余部分的焊盘; 以及与电路层电连接的电路图案，电路图案埋在绝缘体中，使得电路图案的一部分在绝缘体的表面露出。

公开(公告)号：US08018063B2

公开(公告)日：2011-09-13

申请号：US12610211

申请日：2009-10-30

Applicant: Daewoong Suh ,  Stephen E. Lehman, Jr. ,  Mukul Renavikar

Inventor： Daewoong Suh ,  Stephen E. Lehman, Jr. ,  Mukul Renavikar

IPC: H01L23/48 ,  H01L23/52 ,  H01L29/40

CPC classification number: H05K3/3484 ,  H01L24/11 ,  H01L24/13 ,  H01L2224/05001 ,  H01L2224/05023 ,  H01L2224/05144 ,  H01L2224/05147 ,  H01L2224/05155 ,  H01L2224/05164 ,  H01L2224/05568 ,  H01L2224/05647 ,  H01L2224/05655 ,  H01L2224/05669 ,  H01L2224/11 ,  H01L2224/11822 ,  H01L2224/13 ,  H01L2224/13099 ,  H01L2224/13147 ,  H01L2224/136 ,  H01L2224/81011 ,  H01L2924/01015 ,  H01L2924/01027 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01046 ,  H01L2924/01047 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01327 ,  H01L2924/014 ,  H01L2924/14 ,  H01L2924/1433 ,  H05K3/244 ,  H05K3/3436 ,  H05K2201/0215 ,  H05K2201/0341 ,  H05K2203/0435 ,  Y02P70/613 ,  H01L2924/00 ,  H01L2924/00014

Abstract: A microelectronic assembly and method for fabricating the same are described. In an example, a microelectronic assembly includes a microelectronic device having a surface with one or more areas to receive one or more solder balls, the one or more areas having a surface finish comprising Ni. A solder material comprising Cu, such as flux or paste, is applied to the Ni surface finish and one or more solder balls are coupled to the microelectronic device by a reflow process that forms a solder joint between the one or more solder balls, the solder material comprising Cu, and the one or more areas having a surface finish comprising Ni.

Abstract translation: 描述了一种微电子组件及其制造方法。 在一个示例中，微电子组件包括具有一个或多个区域以接收一个或多个焊球的表面的微电子器件，所述一个或多个区域具有包括Ni的表面光洁度。 将包含Cu的焊料材料（例如焊剂或糊料）施加到Ni表面光洁度上，并且一个或多个焊球通过在一个或多个焊球之间形成焊料接头的回流工艺耦合到微电子器件，焊料 包含Cu的材料，并且所述一个或多个区域具有包括Ni的表面光洁度。

公开(公告)号：US20110127669A1

公开(公告)日：2011-06-02

申请号：US12935864

申请日：2009-03-18

Applicant: Hideki Mizuhara ,  Hajime Kobayashi ,  Toshiya Shimizu

Inventor： Hideki Mizuhara ,  Hajime Kobayashi ,  Toshiya Shimizu

IPC: H01L23/498 ,  H01L23/48 ,  H01B5/02 ,  B23K1/20

CPC classification number: B23K1/0016 ,  B23K31/02 ,  B23K35/262 ,  B23K35/3013 ,  B23K2101/42 ,  B32B15/018 ,  C22C13/00 ,  C22C13/02 ,  H01L23/544 ,  H01L24/03 ,  H01L24/05 ,  H01L24/11 ,  H01L24/13 ,  H01L2224/0231 ,  H01L2224/02313 ,  H01L2224/02319 ,  H01L2224/0233 ,  H01L2224/0239 ,  H01L2224/0401 ,  H01L2224/1132 ,  H01L2224/13099 ,  H01L2224/131 ,  H01L2224/16 ,  H01L2924/0001 ,  H01L2924/01004 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01019 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01047 ,  H01L2924/01051 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01322 ,  H01L2924/014 ,  H01L2924/14 ,  H01L2924/181 ,  H01L2924/19041 ,  H05K3/3463 ,  H05K2203/0435 ,  H01L2924/00

Abstract: The invention provides a solder structure which is least likely to develop Sn whiskers and a method for forming such a solder structure. The solder structure includes an Sn alloy capable of a solid-liquid coexistent state and an Au (or Au alloy) coating covering at least part of the surface of the Sn alloy. The Au covering is a film that covers and coats at least part of the surface of the Sn alloy. As a preferable mode, the Au coating forms a netlike structure on the surface of the Sn alloy. The thickness of the Au coating is, for instance, 1 to 5 μm.

Abstract translation: 本发明提供一种不太可能开发Sn晶须的焊料结构和形成这种焊料结构的方法。 焊料结构包括能够具有固液共存状态的Sn合金和覆盖Sn合金表面的至少一部分的Au（或Au合金）涂层。 Au覆盖层是覆盖并涂覆Sn合金表面的至少一部分的膜。 作为优选的方式，Au涂层在Sn合金的表面上形成网状结构。 Au涂层的厚度例如为1〜5μm。

公开(公告)号：US20100044848A1

公开(公告)日：2010-02-25

申请号：US12610211

申请日：2009-10-30

Applicant: Daewoong Suh ,  Stephen E. Lehman, JR. ,  Mukul Renavikar

Inventor： Daewoong Suh ,  Stephen E. Lehman, JR. ,  Mukul Renavikar

IPC: H01L23/485

CPC classification number: H05K3/3484 ,  H01L24/11 ,  H01L24/13 ,  H01L2224/05001 ,  H01L2224/05023 ,  H01L2224/05144 ,  H01L2224/05147 ,  H01L2224/05155 ,  H01L2224/05164 ,  H01L2224/05568 ,  H01L2224/05647 ,  H01L2224/05655 ,  H01L2224/05669 ,  H01L2224/11 ,  H01L2224/11822 ,  H01L2224/13 ,  H01L2224/13099 ,  H01L2224/13147 ,  H01L2224/136 ,  H01L2224/81011 ,  H01L2924/01015 ,  H01L2924/01027 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01046 ,  H01L2924/01047 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01327 ,  H01L2924/014 ,  H01L2924/14 ,  H01L2924/1433 ,  H05K3/244 ,  H05K3/3436 ,  H05K2201/0215 ,  H05K2201/0341 ,  H05K2203/0435 ,  Y02P70/613 ,  H01L2924/00 ,  H01L2924/00014

Abstract: A microelectronic assembly and method for fabricating the same are described. In an example, a microelectronic assembly includes a microelectronic device having a surface with one or more areas to receive one or more solder balls, the one or more areas having a surface finish comprising Ni. A solder material comprising Cu, such as flux or paste, is applied to the Ni surface finish and one or more solder balls are coupled to the microelectronic device by a reflow process that forms a solder joint between the one or more solder balls, the solder material comprising Cu, and the one or more areas having a surface finish comprising Ni.

Abstract translation: 描述了一种微电子组件及其制造方法。 在一个示例中，微电子组件包括具有一个或多个区域以接收一个或多个焊球的表面的微电子器件，所述一个或多个区域具有包括Ni的表面光洁度。 将包含Cu的焊料材料（例如焊剂或糊料）施加到Ni表面光洁度上，并且一个或多个焊球通过在一个或多个焊球之间形成焊料接头的回流工艺耦合到微电子器件，焊料 包含Cu的材料，并且所述一个或多个区域具有包括Ni的表面光洁度。

公开(公告)号：US20080101045A1

公开(公告)日：2008-05-01

申请号：US11976070

申请日：2007-10-19

Applicant: Hoe-Ku Jung ,  Je-Gwang Yoo ,  Myung-Sam Kang ,  Ji-Eun Kim ,  Jeong-Woo Park ,  Jung-Hyun Park

Inventor： Hoe-Ku Jung ,  Je-Gwang Yoo ,  Myung-Sam Kang ,  Ji-Eun Kim ,  Jeong-Woo Park ,  Jung-Hyun Park

IPC: H05K1/18 ,  H05K3/20

CPC classification number: H05K3/205 ,  H01L21/4846 ,  H01L23/49816 ,  H01L2224/16225 ,  H01L2224/16227 ,  H01L2224/73204 ,  H01L2924/15311 ,  H05K3/4007 ,  H05K2201/09745 ,  H05K2201/10674 ,  H05K2203/0338 ,  H05K2203/0435 ,  Y10T29/49126 ,  Y10T29/49128 ,  Y10T29/49144 ,  Y10T29/49149 ,  Y10T29/49155 ,  Y10T29/49165

Abstract: A method of manufacturing a circuit board, which includes a bump pad on which a solder bump may be placed, may include forming a solder pad on a surface of a first carrier; forming a metal film, which covers the solder pad and which extends to a bump pad forming region; forming a circuit layer and a circuit pattern, which are electrically connected with the metal film, on a surface of the first carrier; pressing the first carrier and an insulator such that a surface of the first carrier and the insulator faces each other; and removing the first carrier. Utilizing this method, the amount of solder for the contacting of a flip chip can be adjusted, and solder can be filled inside the board, so that after installing a chip, the overall thickness of the package can be reduced.

Abstract translation: 一种制造电路板的方法，包括可以放置焊锡凸块的凸块焊盘，可以包括在第一载体的表面上形成焊盘; 形成覆盖焊盘并延伸到凸块焊盘形成区域的金属膜; 在所述第一载体的表面上形成与所述金属膜电连接的电路层和电路图案; 按压所述第一载体和绝缘体，使得所述第一载体和所述绝缘体的表面彼此面对; 并移除第一载体。 利用这种方法，可以调节用于接合倒装芯片的焊料的量，并且可以在板内填充焊料，使得在安装芯片之后，可以减小封装的整体厚度。

公开(公告)号：US20070278456A1

公开(公告)日：2007-12-06

申请号：US11754421

申请日：2007-05-29

Applicant: Tadahiko Sakai ,  Tadashi Maeda

Inventor： Tadahiko Sakai ,  Tadashi Maeda

IPC: H01B1/22

CPC classification number: H05K3/3484 ,  H05K2201/0218 ,  H05K2201/0266 ,  H05K2203/0435

Abstract: In a solder paste 3 formed by allowing a resin component 3a having oxide removability to contain solder particles 4A, 4B, and 4C which are formed by coating the surfaces of core particles 6A, 6B, and 6C made of tin (Sn) or an alloy of tin with silver (Ag) coating films 7A, 7B, and 7C, the core particles are distributed to have such a particle distribution that the average particle diameter is in the range of 3 μm to 7 μm and 75% or more of the particles is in the range of 1 μm to 9 μm and the coating film is formed so that the core particles are coated with a silver coating film of an amount which occupies 1 to 4 wt % of the solder particles. Accordingly, it is possible to prevent oxide from being formed on the surfaces of the solder particles and to enhance the solder wettability at the time of soldering. In addition, it is possible to secure printability onto fine electrodes and to secure excellent solder adhesion with respect to a fine-pitch part by the use of a simple and low-cost method.

Abstract translation: 在通过使具有氧化物去除性的树脂组分3a含有通过涂覆由下列物质制成的芯颗粒6A，6B和6C的表面形成的焊料颗粒4A，4B和4C形成的焊膏3中， 锡（Sn）或锡与银（Ag）涂膜7 A，7 B和7 C的合金，芯颗粒分布成具有这样的颗粒分布，使得平均粒径在3μm至 7μm和75％以上的颗粒在1μm〜9μm的范围内，并且形成涂膜，使得芯颗粒涂覆有占银的1〜4wt％的银涂膜 焊料颗粒。 因此，可以防止在焊料颗粒的表面上形成氧化物，并且可以提高焊接时的焊料润湿性。 此外，可以通过简单且低成本的方法将可印刷性确保到细小电极上并且确保相对于细间距部分的良好焊接粘合性。

公开(公告)号：US06344234B1

公开(公告)日：2002-02-05

申请号：US08476475

申请日：1995-06-07

Applicant: Hormazdyar Minocher Dalal ,  Alexis Bitaillou ,  Kenneth Michael Fallon ,  Gene Joseph Gaudenzi ,  Kenneth Robert Herman ,  Frederic Pierre ,  Georges Robert

Inventor： Hormazdyar Minocher Dalal ,  Alexis Bitaillou ,  Kenneth Michael Fallon ,  Gene Joseph Gaudenzi ,  Kenneth Robert Herman ,  Frederic Pierre ,  Georges Robert

IPC: B05D512

CPC classification number: H01L24/12 ,  H01L21/4853 ,  H01L23/49816 ,  H01L24/11 ,  H01L2224/0401 ,  H01L2224/05171 ,  H01L2224/05184 ,  H01L2224/05644 ,  H01L2224/05647 ,  H01L2224/05666 ,  H01L2224/05671 ,  H01L2224/11472 ,  H01L2224/1308 ,  H01L2224/13082 ,  H01L2224/131 ,  H01L2224/13109 ,  H01L2224/13111 ,  H01L2224/13113 ,  H01L2224/136 ,  H01L2224/13609 ,  H01L2924/00013 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01022 ,  H01L2924/01024 ,  H01L2924/01027 ,  H01L2924/01028 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01042 ,  H01L2924/01047 ,  H01L2924/01049 ,  H01L2924/0105 ,  H01L2924/01051 ,  H01L2924/01073 ,  H01L2924/01074 ,  H01L2924/01075 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01083 ,  H01L2924/01322 ,  H01L2924/01327 ,  H01L2924/014 ,  H01L2924/14 ,  H01L2924/15787 ,  H01L2924/19041 ,  H01L2924/19043 ,  H05K3/3436 ,  H05K3/3463 ,  H05K2201/10992 ,  H05K2203/0435 ,  Y02P70/613 ,  Y10T29/49144 ,  H01L2924/00014 ,  H01L2224/13099 ,  H01L2924/00 ,  H01L2924/013

Abstract: A method and structure for a solder interconnection, using solder balls for making a low temperature chip attachment directly to any of the higher levels of packaging substrate is disclosed. After a solder ball has been formed using standard methods it is reflowed to give the solder ball a smooth surface. A layer of low melting point metal, such as, bismuth, indium or tin, preferably, pure tin, is deposited on the top of the solder balls. This structure results in localizing of the eutectic alloy, formed upon subsequent low temperature joining cycle, to the top of the high melting solder ball even after multiple low temperature reflow cycles. This method does not need tinning of the substrate to which the chip is to be joined, which makes this method economical. It has also been noticed that whenever temperature is raised slightly above the eutectic temperature, the structure always forms a liquid fillet around the joint with copper wires. This liquid fillet formation results in substantial thermal fatigue life improvement for reduced stress at interface; and secondly, provides an easy means to remove chip for the purpose of chip burn-in, replacement or field repairs.

Abstract translation: 公开了一种用于焊接互连的方法和结构，其使用用于将低温芯片附接到任何更高级别的封装衬底的焊球。 在使用标准方法形成焊球后，回流焊锡球表面光滑。 一层低熔点金属，例如铋，铟或锡，优选纯锡，沉积在焊料球的顶部。 这种结构导致即使在多个低温回流循环之后，在随后的低温接合循环中形成的共晶合金也定位到高熔点焊球的顶部。 该方法不需要对芯片要连接的基板进行镀锡，这使得该方法成本低廉。 还注意到，当温度升高到略高于共熔温度的情况下，结构总是用铜线在接头周围形成液体圆角。 这种液体圆角形成导致显着的热疲劳寿命改善以减少界面处的应力; 其次，为了芯片烧录，更换或现场维修的目的，提供了一种便于拆卸芯片的方法。