WO2001091525A3 - High-speed fabrication of highly uniform ultra-small metallic microspheres - Google Patents

High-speed fabrication of highly uniform ultra-small metallic microspheres Download PDF

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Publication number
WO2001091525A3
WO2001091525A3 PCT/US2001/016402 US0116402W WO0191525A3 WO 2001091525 A3 WO2001091525 A3 WO 2001091525A3 US 0116402 W US0116402 W US 0116402W WO 0191525 A3 WO0191525 A3 WO 0191525A3
Authority
WO
WIPO (PCT)
Prior art keywords
droplets
satellite
molten metal
satellite droplets
highly uniform
Prior art date
Application number
PCT/US2001/016402
Other languages
French (fr)
Other versions
WO2001091525A2 (en
Inventor
Melissa Orme-Marmerelis
Robert Smith
Original Assignee
Univ California
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US20650800P priority Critical
Priority to US20650700P priority
Priority to US60/206,507 priority
Priority to US60/206,508 priority
Priority to US60/278,495 priority
Priority to US27849501P priority
Priority to US09/860,798 priority
Priority to US09/860,803 priority patent/US6491737B2/en
Priority to US09/860,798 priority patent/US6520402B2/en
Priority to US09/860,803 priority
Application filed by Univ California filed Critical Univ California
Priority claimed from AU6334001A external-priority patent/AU6334001A/en
Publication of WO2001091525A2 publication Critical patent/WO2001091525A2/en
Publication of WO2001091525A3 publication Critical patent/WO2001091525A3/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F1/00Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
    • B22F1/0003Metallic powders per se; Mixtures of metallic powders; Metallic powders mixed with a lubricating or binding agent
    • B22F1/0007Metallic powder characterised by its shape or structure, e.g. fibre structure
    • B22F1/0048Spherical powder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0836Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with electric or magnetic field or induction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/02Making metallic powder or suspensions thereof using physical processes
    • B22F9/06Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/084Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid combination of methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2998/00Supplementary information concerning processes or compositions relating to powder metallurgy
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3457Solder materials or compositions; Methods of application thereof
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3457Solder materials or compositions; Methods of application thereof
    • H05K3/3478Applying solder paste, particles or preforms; Transferring prefabricated solder patterns

Abstract

In a high-speed fabrication process for producing highly uniform ultra-small metallic micro-spheres, a molten metal (16) is passed through a small orifice (30), producing a stream of molten metal (32) therefrom. A series of molten metal droplets forms from the breakup of this capillary stream. Applied harmonic disturbances are used to control and generate satellite (35) and parent (37) droplets. Significantly, the satellite droplets formed are smaller than the orifice, allowing for the production of smaller metal balls and finer pitch conductive traces and ball grid arrays with larger orifices. The satellite droplets are separated from the parent droplets by electrostatic charging (40) and deflection or by aerodynamic or acoustic sorting. In one embodiment, the satellite droplets are cooled before being collected to avoid defects and achieve high uniformity of the resulting metal balls. In another embodiment, the satellite droplets are electrostatically charged on a droplet-by-droplet basis and are then deflected by, e.g., an electric field to predetermined locations on a substrate. The satellite droplets can be placed in individual locations on the substrate or can be overlapped to form conductive traces.
PCT/US2001/016402 2000-05-22 2001-05-21 High-speed fabrication of highly uniform ultra-small metallic microspheres WO2001091525A2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US20650800P true 2000-05-22 2000-05-22
US20650700P true 2000-05-22 2000-05-22
US60/206,507 2000-05-22
US60/206,508 2000-05-22
US27849501P true 2001-03-23 2001-03-23
US60/278,495 2001-03-23
US09/860,803 US6491737B2 (en) 2000-05-22 2001-05-18 High-speed fabrication of highly uniform ultra-small metallic microspheres
US09/860,798 US6520402B2 (en) 2000-05-22 2001-05-18 High-speed direct writing with metallic microspheres
US09/860,803 2001-05-18
US09/860,798 2001-05-18

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU6334001A AU6334001A (en) 2000-05-22 2001-05-21 High-speed fabrication of highly uniform ultra-small metallic microspheres
EP01937626A EP1286789A4 (en) 2000-05-22 2001-05-21 High-speed fabrication of highly uniform ultra-small metallic microspheres

Publications (2)

Publication Number Publication Date
WO2001091525A2 WO2001091525A2 (en) 2001-11-29
WO2001091525A3 true WO2001091525A3 (en) 2002-04-18

Family

ID=27539542

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/016402 WO2001091525A2 (en) 2000-05-22 2001-05-21 High-speed fabrication of highly uniform ultra-small metallic microspheres

Country Status (2)

Country Link
EP (1) EP1286789A4 (en)
WO (1) WO2001091525A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212193A1 (en) 2015-06-30 2017-01-05 Robert Bosch Gmbh 3D printing with improved form reproduction and strength
CN106392088B (en) * 2016-08-31 2019-01-18 北京康普锡威科技有限公司 A kind of metal atomization and electric field select separating device and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5266098A (en) * 1992-01-07 1993-11-30 Massachusetts Institute Of Technology Production of charged uniformly sized metal droplets
US5407458A (en) * 1992-05-04 1995-04-18 H. C. Starck Gmbh & Co. Kg. Fine-particle metal powders
US5445666A (en) * 1992-12-17 1995-08-29 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V. Method for producing small metal balls approximately equal in diameter
US5520715A (en) * 1994-07-11 1996-05-28 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Directional electrostatic accretion process employing acoustic droplet formation
US5746844A (en) * 1995-09-08 1998-05-05 Aeroquip Corporation Method and apparatus for creating a free-form three-dimensional article using a layer-by-layer deposition of molten metal and using a stress-reducing annealing process on the deposited metal
US6007183A (en) * 1997-11-25 1999-12-28 Xerox Corporation Acoustic metal jet fabrication using an inert gas

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627862A (en) * 1968-05-20 1971-12-14 Int Nickel Co Treatment of metal powder
JPS5746432B2 (en) * 1975-12-08 1982-10-02

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5266098A (en) * 1992-01-07 1993-11-30 Massachusetts Institute Of Technology Production of charged uniformly sized metal droplets
US5407458A (en) * 1992-05-04 1995-04-18 H. C. Starck Gmbh & Co. Kg. Fine-particle metal powders
US5445666A (en) * 1992-12-17 1995-08-29 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V. Method for producing small metal balls approximately equal in diameter
US5520715A (en) * 1994-07-11 1996-05-28 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Directional electrostatic accretion process employing acoustic droplet formation
US5746844A (en) * 1995-09-08 1998-05-05 Aeroquip Corporation Method and apparatus for creating a free-form three-dimensional article using a layer-by-layer deposition of molten metal and using a stress-reducing annealing process on the deposited metal
US6007183A (en) * 1997-11-25 1999-12-28 Xerox Corporation Acoustic metal jet fabrication using an inert gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1286789A4 *

Also Published As

Publication number Publication date
WO2001091525A2 (en) 2001-11-29
EP1286789A4 (en) 2004-06-16
EP1286789A2 (en) 2003-03-05

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