WO2005035180A1 - 鉛フリーはんだボール - Google Patents
鉛フリーはんだボール Download PDFInfo
- Publication number
- WO2005035180A1 WO2005035180A1 PCT/JP2004/014724 JP2004014724W WO2005035180A1 WO 2005035180 A1 WO2005035180 A1 WO 2005035180A1 JP 2004014724 W JP2004014724 W JP 2004014724W WO 2005035180 A1 WO2005035180 A1 WO 2005035180A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solder
- lead
- solder ball
- bga
- free
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
- H05K3/3463—Solder compositions in relation to features of the printed circuit board or the mounting process
Definitions
- the present invention relates to a lead-free solder ball used for forming bumps of a surface mount component such as a BGA (ball grid 'array) or CSP (chip size package).
- a surface mount component such as a BGA (ball grid 'array) or CSP (chip size package).
- a BGA package is typically a substrate on which a semiconductor integrated circuit (IC) is mounted on the top surface and a series of electrode rows are arranged on the back surface.
- a round piece of solder called a solder bump is joined to each electrode.
- the BGA package is placed on the printed circuit board, for example, such that each solder bump contacts a corresponding conductive land, and then soldered to the lands by heating to melt the solder bumps.
- Each solder bump forms a micro solder joint, which mechanically and electrically connects the BGA knock to the printed circuit board.
- BGA packages come in very many dimensions and structures.
- BGA package When a chip has a plane size almost the same as that of an integrated circuit chip on a substrate, it is called a CSP (chip scale package).
- CSP chip scale package
- MCM Multi-Chip Module
- solder bumps on such a BGA there are various methods for forming solder bumps on such a BGA, and a general method is to use solder balls. Since the solder balls are of a fixed amount and are spherical, which can be easily supplied to an appropriate position on the substrate, the shape is optimal for forming a bump of a BGA.
- the solder ball used for forming the bump of the conventional BGA was an alloy of Pb and Sn.
- This Pb-Sn alloy solder has a eutectic composition of Pb-63% Sn, and has a melting point of 183 ° C, which is an appropriate temperature that does not thermally damage electronic components. It has excellent wettability to the land of printed circuit boards and printed wiring boards, so it has few soldering failures.
- solders are Sn-Ag based, Sn-Cu based, and Sn based.
- solder obtained by adding Cu to the Sn-Ag system has already been patented by the present applicant as Japanese Patent No. 3,027,441.
- Sn-3Ag-0.5Cu is currently used for soldering many electronic devices because of its excellent properties such as solderability, bonding strength, and thermal fatigue resistance. It is also used as a solder ball for forming BGA bumps.
- Sn-Ag-Cu-based lead-free solder when used as a solder ball, the surface of the solder ball may have irregularities, which may hinder smooth rolling during solder ball mounting. In some cases, this could cause a supply failure in the equipment. Therefore, to eliminate surface irregularities in Sn-Ag-Cu lead-free solder, Sn-Ag-Cu is selected from Ge, Ni, P, Mn, Au, Pd, Pt, S, Bi, Sb, and In.
- Japanese Patent Application Laid-Open No. 2002-57177 discloses a lead-free solder ball containing 0.006 to 0.1% by mass of at least one of the above.
- solder ball disclosed in the above publication has an effect that the supply of the solder ball is not hindered because the surface has no irregularities.
- This solder ball also has the feature that the bonding strength is strong.
- Ge is further effective in improving the oxidation resistance
- Ni, P, Mn, Au, Pd, Pt, S, and In are effective in lowering the melting point and increasing the bonding strength.
- Sb is said to have the effect of improving strength. Disclosure of the invention
- the force for mounting the solder ball on the BGA by the mounting device suctions the solder ball with a suction jig, and then moves the suction jig to a predetermined position on the BGA. Release the solder balls and mount them on the BGA electrodes.
- the BGA substrate on which the solder balls are mounted is heated in a reflow furnace to melt the solder balls and form solder bumps.
- solder balls are mounted even at a single place!
- the entire BGA package which is expensive, becomes defective. Therefore, as described above, after heating in a reflow furnace to form solder bumps,
- the bottom surface is inspected with a recognition device to check for the presence of solder bumps. Since the image recognition device determines the solder bump surface force and reflected light, the surface of the solder ball is yellow. Discoloration (hereinafter referred to as yellowing) lowers the reflectance and may cause an error in the judgment of the presence or absence of solder bumps in the image recognition device. In other words, yellowing of the solder bump surface during heating in a reflow furnace is not preferable!
- solder ball disclosed in Japanese Patent Application Laid-Open No. 2002-57177 has an effect that the unevenness on the surface is improved, so that the solder ball can be easily supplied to the BGA and the bonding strength after soldering is improved.
- strong solder balls are required to further improve the solderability, that is, the wettability of BGA electrodes and printed circuit board lands.
- Such a solder ball has a large bonding strength with a relatively large solder ball, for example, a solder ball having a diameter larger than 0.5 mm. This is because the bonding strength of the solder itself is strong. However, when the solder ball has a diameter of 0.5 mm or less, the bonding strength may be reduced.
- an object of the present invention is to provide a solder ball which is excellent in diametral force, bonding strength at best, does not show yellowing, and exhibits long-term bonding reliability.
- the present invention is a lead-free solder ball characterized in that Agl.O is 4.0% by mass, Cu is 0.05 to 2.0% by mass, P0.0005 is 0.005% by mass, and the balance is Sn force.
- Fig. 2 shows a photograph of a metal thread and a cross section of the interface before and after aging when a solder bump is formed on a gold-plated substrate and a metal thread and a cross section of a peeled surface when P is added. It is a photograph.
- P is a Sn-based solder alloy that not only prevents bump peeling after aging but also yellowing prevention, but when added in large amounts, impairs wettability and generates voids. Element that causes In Sn-Ag-Cu alloys, if the added amount of P is less than 0.0005%, the effect of preventing yellowing does not appear, while if it exceeds 0.005%, solderability is impaired and voids are reduced. Will be generated. Therefore, P: 0.0005-0.005%.
- the lead-free solder ball of the present invention does not melt! Must not yellow.
- the yellowing of the lead-free solder ball must not be caused by the yellowing of the lead-free solder ball at the time of acceptance inspection. This is because it is strange.
- Solder balls used for the BGA are microspheres such as force CSPs whose mainstream is 0.5 to 0.76mm and 0.04 to 0.5mm for wafers. Since the lead-free solder ball of the present invention generates very few voids, it is possible to maintain the bonding strength even in such a microsphere. It has the effect of improving the reliability of solder balls of small spheres such as 0.04-0.5mm.
- the manufacturing method of the solder ball that is effective in the present invention is not particularly limited, and may be manufactured by any appropriate means. For example, it may be manufactured by employing various ball-in-oil methods, a uniform droplet spraying method, or the like.
- Example 1
- Figures 1 and 2 are microstructure photographs of the joint interface between Ni and Sn-3.0Ag-0.5Cu solder on the base of the gold-plated substrate and the cross-sectional structure of the peeled surface by a pull test. Indicates the case without and with. In each case, photographs of the cross-sectional metal structure of the peeled surface before and after aging are also shown.
- the pull release surface after aging is the same as the interface between the P-rich layer and the Z reaction layer without the addition of P on the gold-plated substrate. ). In the pre-flux substrate, both are at the Cu Sn / Cu Sn interface.
- the second layer is formed on the gold-plated substrate, and the Cu Sn layer is formed on the pre-flux substrate.
- the lead-free solder ball of the present invention has excellent wettability with respect to BGA electrodes and lands of a printed circuit board. Therefore, a strong bonding strength can be obtained.
- the lead-free solder ball of the present invention has an excellent effect for forming a bump of a BGA, it can also be used for forming a bump on a wafer having a smaller electrode in addition to the BGA and CSP. . Since the solder balls for wafer bumps are extremely small with a diameter of 0.1 mm or less and the joint area is also extremely small, even a small void in the soldered part greatly affects the joint strength . However, since the lead-free solder ball of the present invention hardly generates voids, when used for forming a wafer bump, a strong bonding strength can be obtained.
- solder ball of the present invention a solder bump having excellent bonding reliability can be obtained even when used for a long time or in a high-temperature environment.
- automotive substrates and industrial equipment substrates are often coated with a resin such as silicone, but the effect of the trace amount of P-added calo, which significantly improves peeling resistance due to aging, is unexpected. Accordingly, the present invention greatly contributes to improvement in reliability of electronic devices.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/570,626 US7750475B2 (en) | 2003-10-07 | 2004-10-06 | Lead-free solder ball |
JP2005514575A JP3925554B2 (ja) | 2003-10-07 | 2004-10-06 | 鉛フリーはんだボール |
AT04792080T ATE555871T1 (de) | 2003-10-07 | 2004-10-06 | Bleifreie lotkugel |
EP04792080A EP1679149B1 (en) | 2003-10-07 | 2004-10-06 | Lead-free solder ball |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003347950 | 2003-10-07 | ||
JP2003-347950 | 2003-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005035180A1 true WO2005035180A1 (ja) | 2005-04-21 |
Family
ID=34430943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014724 WO2005035180A1 (ja) | 2003-10-07 | 2004-10-06 | 鉛フリーはんだボール |
Country Status (10)
Country | Link |
---|---|
US (1) | US7750475B2 (ja) |
EP (1) | EP1679149B1 (ja) |
JP (1) | JP3925554B2 (ja) |
KR (1) | KR100923900B1 (ja) |
CN (1) | CN100509257C (ja) |
AT (1) | ATE555871T1 (ja) |
MY (1) | MY136217A (ja) |
PT (1) | PT1679149E (ja) |
TW (1) | TWI357368B (ja) |
WO (1) | WO2005035180A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1894667A1 (en) * | 2005-06-10 | 2008-03-05 | Senju Metal Industry Co., Ltd. | METHOD FOR SOLDERING ELECTROLESS Ni PLATING PART |
CN100431747C (zh) * | 2005-10-27 | 2008-11-12 | 徐振武 | 一种无铅焊锡球的制备方法 |
JP2009248156A (ja) * | 2008-04-08 | 2009-10-29 | Hitachi Metals Ltd | はんだボール、はんだ層及びはんだバンプ並びにそれらの形成方法 |
EP3427888A4 (en) * | 2016-03-08 | 2019-09-25 | Senju Metal Industry Co., Ltd | SOLDERING, SOLDERING BALL, CHIP SOLDER, SOLDERING PASTE AND SOLDERING |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006040847A1 (ja) * | 2004-10-14 | 2006-04-20 | Ibiden Co., Ltd. | プリント配線板及びプリント配線板の製造方法 |
CN101208174B (zh) | 2005-06-03 | 2010-12-15 | 千住金属工业株式会社 | 无铅焊料合金 |
US20100006336A1 (en) * | 2007-05-11 | 2010-01-14 | Tomohiro Shimada | Lid or case for sealed package and method for manufacturing the same |
JP2009004454A (ja) * | 2007-06-19 | 2009-01-08 | Shinko Electric Ind Co Ltd | 電極構造体及びその形成方法と電子部品及び実装基板 |
KR20110036541A (ko) * | 2008-06-23 | 2011-04-07 | 윌리엄스 어드밴스드 머티리얼즈 인코포레이티드 | 무연 주석계 땜납과의 가공 상용성을 위한 금-주석-인듐 땜납 |
US20100203353A1 (en) * | 2009-02-06 | 2010-08-12 | Iowa State University Research Foundation, Inc. | Pb-Free Sn-Ag-Cu-Mn Solder |
JP5584427B2 (ja) * | 2009-04-14 | 2014-09-03 | 新日鉄住金マテリアルズ株式会社 | 無鉛ハンダ合金、ハンダボール及びハンダバンプを有する電子部材 |
CN101722379B (zh) * | 2009-11-26 | 2011-04-13 | 大丰市大奇金属磨料有限公司 | 一种球栅阵列封装无铅锡球的制备工艺 |
US8508054B2 (en) * | 2011-06-16 | 2013-08-13 | Broadcom Corporation | Enhanced bump pitch scaling |
KR101283580B1 (ko) * | 2011-12-14 | 2013-07-05 | 엠케이전자 주식회사 | 주석계 솔더 볼 및 이를 포함하는 반도체 패키지 |
CN104602862B (zh) * | 2012-06-30 | 2017-05-17 | 千住金属工业株式会社 | 无铅焊料球 |
KR101284363B1 (ko) * | 2013-01-03 | 2013-07-08 | 덕산하이메탈(주) | 금속코어 솔더볼 및 이를 이용한 반도체 장치의 방열접속구조 |
US9520347B2 (en) | 2013-05-03 | 2016-12-13 | Honeywell International Inc. | Lead frame construct for lead-free solder connections |
CN103586600A (zh) * | 2013-11-12 | 2014-02-19 | 宁波市鄞州恒迅电子材料有限公司 | 无铅焊锡合金球 |
JP2017509489A (ja) | 2014-02-20 | 2017-04-06 | ハネウェル・インターナショナル・インコーポレーテッド | 鉛フリーはんだ組成物 |
KR102460042B1 (ko) * | 2020-05-14 | 2022-10-28 | 엠케이전자 주식회사 | 무연 솔더 합금, 솔더볼, 솔더 페이스트, 및 반도체 부품 |
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JPH1177366A (ja) * | 1997-07-16 | 1999-03-23 | Fuji Electric Co Ltd | はんだ合金 |
JP2000254793A (ja) * | 1999-03-09 | 2000-09-19 | Oki Electric Ind Co Ltd | 低含鉛はんだ合金 |
WO2001003878A1 (en) | 1999-07-07 | 2001-01-18 | Multicore Solders Limited | Solder alloy |
JP2002057177A (ja) | 2000-08-09 | 2002-02-22 | Hitachi Metals Ltd | はんだボールおよびその製造方法 |
US20030024733A1 (en) | 2001-03-06 | 2003-02-06 | Hitachi Cable Ltd. | Lead-free solder, and connection lead and electrical component using said lead-free solder |
EP1464431A1 (en) | 2002-01-10 | 2004-10-06 | Senju Metal Industry Co., Ltd. | Soldering method and solder alloy for additional supply |
EP1468777A1 (en) | 2003-04-17 | 2004-10-20 | Senju Metal Industry Co., Ltd. | Lead free solder |
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TW592872B (en) * | 2001-06-28 | 2004-06-21 | Senju Metal Industry Co | Lead-free solder alloy |
SG139507A1 (en) * | 2001-07-09 | 2008-02-29 | Quantum Chem Tech Singapore | Improvements in or relating to solders |
JP4144415B2 (ja) | 2003-01-07 | 2008-09-03 | 千住金属工業株式会社 | 鉛フリーはんだ |
US20070243098A1 (en) * | 2004-07-29 | 2007-10-18 | Tsukasa Ohnishi | Lead-Free Solder |
-
2004
- 2004-10-06 CN CNB2004800290583A patent/CN100509257C/zh active Active
- 2004-10-06 PT PT04792080T patent/PT1679149E/pt unknown
- 2004-10-06 EP EP04792080A patent/EP1679149B1/en active Active
- 2004-10-06 US US10/570,626 patent/US7750475B2/en active Active
- 2004-10-06 AT AT04792080T patent/ATE555871T1/de active
- 2004-10-06 WO PCT/JP2004/014724 patent/WO2005035180A1/ja active Application Filing
- 2004-10-06 JP JP2005514575A patent/JP3925554B2/ja active Active
- 2004-10-06 KR KR1020067006594A patent/KR100923900B1/ko active IP Right Grant
- 2004-10-07 TW TW093130375A patent/TWI357368B/zh active
- 2004-10-07 MY MYPI20044112A patent/MY136217A/en unknown
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JPH1177366A (ja) * | 1997-07-16 | 1999-03-23 | Fuji Electric Co Ltd | はんだ合金 |
JP2000254793A (ja) * | 1999-03-09 | 2000-09-19 | Oki Electric Ind Co Ltd | 低含鉛はんだ合金 |
WO2001003878A1 (en) | 1999-07-07 | 2001-01-18 | Multicore Solders Limited | Solder alloy |
JP2002057177A (ja) | 2000-08-09 | 2002-02-22 | Hitachi Metals Ltd | はんだボールおよびその製造方法 |
US20030024733A1 (en) | 2001-03-06 | 2003-02-06 | Hitachi Cable Ltd. | Lead-free solder, and connection lead and electrical component using said lead-free solder |
EP1464431A1 (en) | 2002-01-10 | 2004-10-06 | Senju Metal Industry Co., Ltd. | Soldering method and solder alloy for additional supply |
EP1468777A1 (en) | 2003-04-17 | 2004-10-20 | Senju Metal Industry Co., Ltd. | Lead free solder |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1894667A1 (en) * | 2005-06-10 | 2008-03-05 | Senju Metal Industry Co., Ltd. | METHOD FOR SOLDERING ELECTROLESS Ni PLATING PART |
EP1894667A4 (en) * | 2005-06-10 | 2009-12-02 | Senju Metal Industry Co | METHOD FOR BRAZING A UNLIMITED NICKEL PART |
US8887980B2 (en) | 2005-06-10 | 2014-11-18 | Senju Metal Industry Co., Ltd. | Method of soldering portions plated by electroless Ni plating |
CN100431747C (zh) * | 2005-10-27 | 2008-11-12 | 徐振武 | 一种无铅焊锡球的制备方法 |
JP2009248156A (ja) * | 2008-04-08 | 2009-10-29 | Hitachi Metals Ltd | はんだボール、はんだ層及びはんだバンプ並びにそれらの形成方法 |
EP3427888A4 (en) * | 2016-03-08 | 2019-09-25 | Senju Metal Industry Co., Ltd | SOLDERING, SOLDERING BALL, CHIP SOLDER, SOLDERING PASTE AND SOLDERING |
US10773345B2 (en) | 2016-03-08 | 2020-09-15 | Senju Metal Industry Co., Ltd. | Solder alloy, solder ball, chip solder, solder paste, and solder joint |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005035180A1 (ja) | 2007-11-22 |
ATE555871T1 (de) | 2012-05-15 |
TW200518871A (en) | 2005-06-16 |
JP3925554B2 (ja) | 2007-06-06 |
KR100923900B1 (ko) | 2009-10-28 |
PT1679149E (pt) | 2012-07-02 |
US20070069379A1 (en) | 2007-03-29 |
CN100509257C (zh) | 2009-07-08 |
MY136217A (en) | 2008-08-29 |
US7750475B2 (en) | 2010-07-06 |
EP1679149B1 (en) | 2012-05-02 |
TWI357368B (en) | 2012-02-01 |
EP1679149A1 (en) | 2006-07-12 |
EP1679149A4 (en) | 2007-03-28 |
CN1863639A (zh) | 2006-11-15 |
KR20060120008A (ko) | 2006-11-24 |
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