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US-2015371745-A1 · Dec 24, 2015 · US
Metal paste and use thereof for joining components
US2018147673A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018147673-A1 |
| Application number | US-201615580750-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 2, 2016 |
| Priority date | Sep 4, 2015 |
| Publication date | May 31, 2018 |
| Grant date | — |
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Abstract
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The invention relates to a metal paste, containing (A) 75 to 90% by weight of copper and/or silver particles that are provided with a coating containing at least one organic compound, (B) 5 to 20% by weight of an organic solvent, and (C) 2 to 20% by weight of at least one type of metal particles different from the particles of (A) and having an average particle size (d50) in the range of 0.2 to 10 μm. The metal particles of component (C) are selected from the group consisting of molybdenum particles and nickel core-silver shell particles with a silver content of 10 to 90% by weight.
First claim
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1 . Metal paste that comprises (A) 75 to 90% by weight copper and/or silver particles that comprise a coating that contains at least one organic compound, (B) 5 to 20% by weight organic solvent, and (C) 2 to 20% by weight of at least one type of metal particles that are different from particles (A) and have a mean particle size (d50) in the range of 0.2 to 10 μm, whereby the metal particles of component (C) are selected from the group consisting of molybdenum particles and nickel core-silver jacket particles with a silver content of 10 to 90% by weight. 2 . Metal paste according to claim 1 , whereby the copper and/or silver particles (A) take the shape of flakes. 3 . Metal paste according to claim 1 , whereby the at least one organic compound is selected from the group consisting of free fatty acids, fatty acid salts, and fatty acid esters. 4 . Metal paste according to claim 1 , whereby the silver content of the nickel core-silver jacket particles is in the range of 15 to 30% by weight. 5 . Metal paste according to claim 4 , whereby the nickel core-silver jacket particles have a silver content of 25% by weight. 6 . Metal paste according to claim 1 , whereby the particles (C) comprise neither flakes nor needles. 7 . Metal paste according to claim 6 , whereby the particles (C) comprise a shape factor in the range of 1 to 3. 8 . Metal paste according to claim 1 , containing, aside from ingredients (A) to (C), 0 to 12% by weight of at least one metal precursor (D), 0 to 10% by weight of at least one sintering aid (E), and 0 to 15% by weight of one or more further ingredients (F) selected from dispersion agents, surfactants, de-foaming agents, binding agents, polymers and/or viscosity-controlling (rheological) agents. 9 . Method for the connecting of components, consisting of (a) providing a sandwich arrangement that comprises at least (a1) one component 1, (a2) one component 2, and (a3) one metal paste according to any one of the preceding claims that is situated between component 1 and component 2, and (b) sintering the sandwich arrangement. 10 . Method according to claim 9 , whereby the sintering takes place with or without pressure. 11 . Method according to claim 9 , whereby the components are parts that are used in electronics. 12 . Method according to claim 11 , whereby the components are components having a contact surface in the range of >16 to 12,000 mm 2 .
Assignees
Inventors
Classifications
Connecting techniques · CPC title
comprising metals or metalloids, e.g. solders · CPC title
Die-attach connectors having a filler embedded in a matrix · CPC title
Die-attach connectors · CPC title
Metallic particles coated with metal · CPC title
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Frequently asked questions
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- What does patent US2018147673A1 cover?
- The invention relates to a metal paste, containing (A) 75 to 90% by weight of copper and/or silver particles that are provided with a coating containing at least one organic compound, (B) 5 to 20% by weight of an organic solvent, and (C) 2 to 20% by weight of at least one type of metal particles different from the particles of (A) and having an average particle size (d50) in the range of 0.2 to…
- Who is the assignee on this patent?
- Heraeus Deutschland Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification B22F1/102. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu May 31 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).