WO2009134012A2 - 전자 부품용 금속 프레임 - Google Patents
전자 부품용 금속 프레임 Download PDFInfo
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- WO2009134012A2 WO2009134012A2 PCT/KR2009/001551 KR2009001551W WO2009134012A2 WO 2009134012 A2 WO2009134012 A2 WO 2009134012A2 KR 2009001551 W KR2009001551 W KR 2009001551W WO 2009134012 A2 WO2009134012 A2 WO 2009134012A2
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- WIPO (PCT)
- Prior art keywords
- metal frame
- metal
- lead
- metal layer
- frame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49579—Lead-frames or other flat leads characterised by the materials of the lead frames or layers thereon
- H01L23/49582—Metallic layers on lead frames
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49579—Lead-frames or other flat leads characterised by the materials of the lead frames or layers thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48464—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area also being a ball bond, i.e. ball-to-ball
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- 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
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- 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
- H01L2924/01—Chemical elements
- H01L2924/01004—Beryllium [Be]
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- 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
- H01L2924/01—Chemical elements
- H01L2924/01012—Magnesium [Mg]
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- H—ELECTRICITY
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- 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
- H01L2924/01—Chemical elements
- H01L2924/01025—Manganese [Mn]
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- 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
- H01L2924/01—Chemical elements
- H01L2924/01029—Copper [Cu]
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- 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
- H01L2924/01—Chemical elements
- H01L2924/01078—Platinum [Pt]
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- 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
- H01L2924/013—Alloys
- H01L2924/0132—Binary Alloys
- H01L2924/01327—Intermediate phases, i.e. intermetallics compounds
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- 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
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- the present invention relates to a metal frame for electronic components, and more particularly, to a metal frame for electronic components that can minimize the occurrence of defects due to whiskers.
- Electronic components used in various electrical and electronic devices include electronic devices such as semiconductor devices or electroluminescent devices, and metal frames to function as supports for electrically connecting them to external circuit devices and maintaining their shape. Doing.
- Typical metal frames for electronic components are lead frames used in semiconductor packages.
- the metal frame for the electronic component is not only electrically connected to the electronic device mounted thereon, but also electrically connected to the external circuit device, and the electrical connection with the external circuit device is usually made by soldering.
- Soldering is a technique of joining a joined material to be joined using a solder having a melting point of 450 ° C. or lower, and is a technique of melting only a solder without melting a base material.
- solder alloy used for soldering has mainly used lead-free (Pb-free) Sn-based solder alloys containing no lead and containing tin (Sn).
- Pb-free solders are Sn-Ag-based, Sn-Cu-based, Sn-Bi-based, Sn-Zn-based, and alloys of the aforementioned series, in which Ag, Cu, Zn, In, Ni, Cr, Fe, Co, Ge, P, and Ga are added suitably.
- the metal frame for electronic components to form a complete electronic component through the assembly process with the electronic device the Cu-based alloy excellent in electrical conductivity and solderability is mainly used, Sn-based plating is used on the surface .
- whisker is easily formed between the aforementioned solder alloy or on the surface of the metal frame.
- This whisker refers to the protruding crystals that occur on the surface when different materials join and diffuse together. These whiskers are sensitive to heat and moisture. If the whisker is formed on the surface of the metal frame, there is a problem in that an electrical short circuit occurs in the circuit to shorten the life of the electronic component.
- FIG. 1 is a plan view showing an embodiment of a lead frame for a semiconductor package which is an example of a metal frame for an electronic component of the present invention
- FIG. 2 is a cross-sectional view illustrating a semiconductor package completed by a molding process with respect to the lead frame of FIG. 1;
- FIG. 3 is a partially enlarged cross-sectional view illustrating another example of the portion A of FIG. 2.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a metal frame for electronic components that minimizes occurrence of defects such as an electrical short caused by a whisker.
- the present invention includes a lead portion that is electrically connected to the electronic device, the lead portion includes copper (Cu) as a main component, and further includes boron (B) or beryllium (Be) It provides a metal frame for an electronic component comprising a first metal layer comprising.
- the boron (B) or beryllium (Be) is included, 0.01 wt% to 0.5 wt%, the remainder may be provided with the copper (Cu) and inevitable impurities.
- the first metal layer may further include iron (Fe), 0.1 wt% to 6 wt% may be included.
- the first metal layer may further include phosphorus (P), and may include 0.006 wt% to 0.2 wt%.
- the first metal layer may be provided integrally with the lead part.
- the metal frame for the electronic component may further include a mounting portion on which the electronic element is mounted, and the mounting portion may be made of the same material as the lead portion.
- the metal frame for the electronic component may further include a second metal layer including tin as a main component on at least a surface of the lead portion electrically connected to the external circuit.
- the second metal layer may be a plating layer made of pure tin.
- the formation of a tin-based metal layer on at least one surface of the metal frame for the electronic component can be avoided from the problem of whiskers, and the occurrence of whiskers can be prevented even when a pure tin plating layer is formed. Therefore, it is possible to provide a metal frame for electronic components of higher quality at a lower cost.
- FIG. 1 is a plan view showing an embodiment of a lead frame for a semiconductor package which is an example of a metal frame for an electronic component of the present invention
- FIG. 2 is a cross-sectional view of the semiconductor package completed until a molding process.
- the lead frame 10 may include a die pad 11, which is a seating part on which other components, for example, a semiconductor chip 12, which is a memory device, is seated, and the semiconductor chip 12. And a lead unit 15 that electrically connects the external circuit with each other.
- the lead frame 10 for a semiconductor package according to an embodiment of the present invention has an internal lead 13 connected to the semiconductor chip 12 by wire bonding and an external lead for connection with an external circuit. (external lead) 14.
- the semiconductor chip 12 is seated on the die pad 11, and the semiconductor chip 12 and the internal lead 13 are connected to the wire 16. After being bonded by, it is molded by the resin protective material 17.
- the said lead part 15, especially the external lead 14 is comprised with the alloy containing copper (Cu) as a main component.
- the outer lead 14 may further include a first metal layer including the copper as a main component and further including boron (B) or beryllium (Be).
- the inclusion of copper as a main component herein means a copper-based polyalloy in which the center element of the alloy is copper, and at this time, copper (Cu) is preferably contained at least 80% by weight or more.
- copper (Cu) is preferably contained at least 80% by weight or more.
- the first metal layer may be positioned at at least a portion of the lead frame 15 at least bonded to the solder material of the lead frame 10, and may be integrally provided with at least the lead unit 15.
- the entire lead portion 15 may be provided as a single first metal layer.
- the lead portion 15 of the lead frame 10, in particular the outer lead 14, is electrically connected to the external circuit, in particular by a solder material whose primary metal layer contains tin as the main component.
- the whisker as described above may be generated by the mutual diffusion of the copper component of the lead portion 15 and the tin component of the solder material.
- the present inventors included beryllium (Be) or boron (B) as the second element in the first metal layer of the lead portion 15 containing copper as a main component in order to suppress the occurrence of such whiskers.
- whiskers may be generated on the surface of the solder material due to the reaction between the metal frame and the solder material, but the cause of the whiskers is not clear yet.
- the present inventors have noted that when a metal frame composed mainly of copper and a solder material composed mainly of tin are joined, mutual diffusion occurs between the metal frame and the solder member.
- the diffusion rate of the copper component of the metal frame into the solder material is faster than the diffusion speed of the tin component of the solder material into the metal frame.
- the diffusion rate of the copper component along the grain boundary of the solder material is high.
- the present inventors thought that such a diffusion produces a compressive stress in the solder material, and to solve this compressive stress, a whisker, a whisker-like single crystal, is formed on the surface of the solder material.
- the present inventors infiltrated the small atomic size metal into the interstitial site of the tin crystal of the solder material in order to suppress the interdiffusion between the metal frame and the solder material, thereby suppressing the intermetallic diffusion between the copper and the tin solder. It is intended to reduce the occurrence of compressive stress in the ash, thereby suppressing the occurrence of whiskers themselves. That is, the metal having the small atomic size included in the first metal layer of the metal frame penetrates into the lattice sites of the tin crystal before the copper is diffused between the copper and tin. This suppresses intermetallic diffusion between copper and tin.
- Be or B is used as the metal having the small atomic size.
- the first metal layer may include beryllium (Be) or boron (B) as a second element in an alloy mainly containing copper (Cu), and may include only copper and beryllium or copper and boron.
- Be beryllium
- B boron
- beryllium or boron contained in the copper-based alloy may be included in 0.005% by weight to 0.5% by weight.
- the second element beryllium (Be) or boron (B) is diffused into the solder material as compared to the case where the second element beryllium (Be) or boron (B) is less than 0.005% by weight, respectively, and tin crystals.
- the amount is sufficient to suppress the growth of whiskers. Therefore, whiskers may not be generated even under severe conditions such as thermal shock test and constant temperature and humidity test, which will be described later.
- beryllium (Be) or boron (B) is contained in more than 0.5% by weight, respectively, beryllium or boron that enters the interstitial position of copper (Cu) is saturated, the cost is increased and economical efficiency is low .
- the die pad 11 and the lead part 15 may be formed of the same material. That is, it may be press-molded after being formed of a plate material of the same material.
- the first metal layer may further include iron (Fe), the rigidity can be further improved by the inclusion of iron.
- the iron (Fe) may be included 0.1 wt% to 6 wt%. By incorporation of such iron, the strength of the alloy may be improved by precipitation strengthening.
- the lead frame 10 may further include phosphorus (P).
- the phosphorus (P) may be included in 0.006% by weight to 0.2% by weight.
- the phosphorus may improve the strength of the alloy.
- the first metal layer may further include a small amount of Ni, Sn, In, Mg, Mn, Si, Ti, Cr, etc. in order to improve the strength of the alloy, and improve the adhesion of the oxide film to the solder material and the thermal peeling resistance.
- Zn may be further included.
- the second metal layer 20 may be further provided on at least the lead portion 15, particularly the outer lead 14.
- the second metal layer 20 is formed to prevent corrosion of the lead frame 10 and to further improve bonding in the bonding with the solder material described above. Tin is mainly used for bonding with the solder material. It is desirable to.
- the reaction between the lead frame 10 and the second metal layer 20 is performed for the same reason as preventing the whisker between the above-described solder material. Whisker generation on the surface of the second metal layer 20 or the solder material can be prevented.
- the beryllium or boron contained in the lead frame 10 diffuses into the lattice sites of the tin crystals, thereby suppressing diffusion between copper and tin, thereby suppressing the occurrence of whiskers.
- the second metal layer 20 may be formed of a plating layer made of pure tin.
- plating with a tin-based metal may be generally used to improve adhesion to the tin-based solder material described above.
- plating with pure tin may not be performed because the above-mentioned whiskers are more generated.
- the lead frame is formed of a metal material containing beryllium or boron in the copper component as described above, even if a plating layer made of pure tin is formed on the surface thereof, between the plating layer and the lead frame base material.
- the diffusion as described above can be suppressed to prevent the occurrence of whiskers.
- Pure tin can be obtained more cheaply than alloy tin, and also excellent in bonding property with a solder material.
- the present invention can form a plating layer on the lead frame surface with such pure tin.
- the present invention can provide a cheaper lead frame of excellent characteristics without whiskers.
- the second metal layer 20 may be formed over the entirety of the lead part 15, in particular, the external lead 14, but to prevent corrosion of the entire lead frame 10. It may be formed on the surface of the entire lead frame 10 including the die pad 11.
- the second metal layer 20 may be formed only on the surface of the bonding portion 14a of the external lead 14 with the solder material.
- the present invention can be applied not only to the lead frame as in the above-described embodiment, but also to the frame of the semiconductor package having another structure such as BGA, and also to the metal frame for other electronic components such as a connector.
- the present invention as described above can be used for metal frames for various electronic components in contact with the tin-based metal material.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Lead Frames For Integrated Circuits (AREA)
- Die Bonding (AREA)
Abstract
Description
Claims (10)
- 전자 소자와 전기적으로 연결되는 리드부를 포함하고,상기 리드부는, 구리(Cu)를 주된 성분으로 포함하고, 붕소(B) 또는 베릴륨(Be)을 더 포함하는 제1금속층을 구비한 것을 특징으로 하는 전자 부품용 금속 프레임.
- 제1항에 있어서, 상기 붕소(B) 또는 베릴륨(Be)이, 0.01 중량% 내지 0.5 중량% 포함되고, 나머지는 상기 구리(Cu) 및 불가피한 불순물로 구비된 전자 부품용 금속 프레임.
- 제1항에 있어서, 상기 제1금속층은 철(Fe)을 더 포함하는 전자 부품용 금속 프레임.
- 제3항에 있어서, 상기 철은 0.1 중량% 내지 6 중량% 포함된 전자 부품용 금속 프레임.
- 제1항에 있어서, 상기 제1금속층은 인(P)을 더 포함하는 전자 부품용 금속 프레임.
- 제5항에 있어서, 상기 인(P)은 0.006 중량% 내지 0.2 중량% 포함된 전자 부품용 금속 프레임.
- 제1항 내지 제6항 중 어느 한 항에 있어서, 상기 제1금속층은 적어도 상기 리드부와 일체로 구비된 전자 부품용 금속 프레임.
- 제1항 내지 제6항 중 어느 한 항에 있어서, 상기 전자 소자가 안착되는 장착부를 더 포함하고, 상기 장착부는 상기 리드부와 동일 재료로 구비된 전자 부품용 금속 프레임.
- 제1항 내지 제6항 중 어느 한 항에 있어서, 적어도 상기 외부회로와 전기적으로 연결되는 상기 리드부의 면에 주석을 주된 성분으로 하는 제2금속층을 더 포함하는 전자 부품용 금속 프레임.
- 제9항에 있어서, 상기 제2금속층은 순수 주석으로 이루어진 도금층인 전자 부품용 금속 프레임.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011507334A JP2011519180A (ja) | 2008-04-29 | 2009-03-26 | 電子部品用金属フレーム |
CN2009801155806A CN102017136A (zh) | 2008-04-29 | 2009-03-26 | 电子零件用的金属导线架 |
EP09738919A EP2280413A4 (en) | 2008-04-29 | 2009-03-26 | METALLIC FRAMEWORK FOR ELECTRONIC COMPONENTS |
US12/990,073 US20110038135A1 (en) | 2008-04-29 | 2009-03-26 | Metal frame for electronic part |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2008-0039904 | 2008-04-29 | ||
KR1020080039904A KR101092616B1 (ko) | 2008-04-29 | 2008-04-29 | 전자 부품용 금속 프레임 |
Publications (2)
Publication Number | Publication Date |
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WO2009134012A2 true WO2009134012A2 (ko) | 2009-11-05 |
WO2009134012A3 WO2009134012A3 (ko) | 2009-12-23 |
Family
ID=41255517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2009/001551 WO2009134012A2 (ko) | 2008-04-29 | 2009-03-26 | 전자 부품용 금속 프레임 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110038135A1 (ko) |
EP (1) | EP2280413A4 (ko) |
JP (1) | JP2011519180A (ko) |
KR (1) | KR101092616B1 (ko) |
CN (1) | CN102017136A (ko) |
TW (1) | TWI404185B (ko) |
WO (1) | WO2009134012A2 (ko) |
Family Cites Families (22)
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JPS5947751A (ja) * | 1982-09-13 | 1984-03-17 | Nippon Mining Co Ltd | 半導体機器のリ−ド材用銅合金 |
JPS59117144A (ja) * | 1982-12-23 | 1984-07-06 | Toshiba Corp | リ−ドフレ−ムおよびその製造方法 |
JPS6250426A (ja) * | 1985-08-29 | 1987-03-05 | Furukawa Electric Co Ltd:The | 電子機器用銅合金 |
JP2522524B2 (ja) * | 1988-08-06 | 1996-08-07 | 株式会社東芝 | 半導体装置の製造方法 |
JPH04276037A (ja) * | 1991-03-04 | 1992-10-01 | Yamaha Corp | リードフレーム用銅合金 |
JP3728776B2 (ja) * | 1995-08-10 | 2005-12-21 | 三菱伸銅株式会社 | めっき予備処理工程中にスマットが発生することのない高強度銅合金 |
US5833920A (en) * | 1996-02-20 | 1998-11-10 | Mitsubishi Denki Kabushiki Kaisha | Copper alloy for electronic parts, lead-frame, semiconductor device and connector |
JP2868463B2 (ja) * | 1996-05-30 | 1999-03-10 | 九州日本電気株式会社 | 電子部品 |
EP0854200A1 (en) * | 1996-10-28 | 1998-07-22 | BRUSH WELLMAN Inc. | Copper-beryllium alloy |
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-
2008
- 2008-04-29 KR KR1020080039904A patent/KR101092616B1/ko active IP Right Grant
-
2009
- 2009-03-26 JP JP2011507334A patent/JP2011519180A/ja active Pending
- 2009-03-26 EP EP09738919A patent/EP2280413A4/en not_active Withdrawn
- 2009-03-26 WO PCT/KR2009/001551 patent/WO2009134012A2/ko active Application Filing
- 2009-03-26 CN CN2009801155806A patent/CN102017136A/zh active Pending
- 2009-03-26 US US12/990,073 patent/US20110038135A1/en not_active Abandoned
- 2009-04-28 TW TW098114031A patent/TWI404185B/zh not_active IP Right Cessation
Non-Patent Citations (2)
Title |
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None |
See also references of EP2280413A4 |
Also Published As
Publication number | Publication date |
---|---|
CN102017136A (zh) | 2011-04-13 |
KR20090114118A (ko) | 2009-11-03 |
US20110038135A1 (en) | 2011-02-17 |
JP2011519180A (ja) | 2011-06-30 |
WO2009134012A3 (ko) | 2009-12-23 |
TWI404185B (zh) | 2013-08-01 |
TW201001657A (en) | 2010-01-01 |
EP2280413A2 (en) | 2011-02-02 |
EP2280413A4 (en) | 2013-03-06 |
KR101092616B1 (ko) | 2011-12-13 |
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