Flux and solder paste
US-2024278360-A1 · Aug 22, 2024 · US
Metal paste for joining, joining method and joined body
US2016121435A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016121435-A1 |
| Application number | US-201414891473-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 15, 2014 |
| Priority date | May 17, 2013 |
| Publication date | May 5, 2016 |
| Grant date | — |
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- Title
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Abstract
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A metal paste for joining includes aggregates of metal nanoparticles and a solvent, and an average particle size of the aggregates is 1 μm or more.
First claim
Opening claim text (preview).
1 . A metal paste for joining, the metal paste comprising: aggregates of metal nanoparticles; and a solvent, wherein an average particle size of the aggregates is 1 μm or more, and a content of the aggregates is 5 to 50% by weight of a weight of the metal paste. 2 . (canceled) 3 . The metal paste according to claim 1 , further comprising: metal particles having an average particle size of 0.3 to 3 μm. 4 . The metal paste according to claim 3 , wherein a content of the metal particles is 60 to 90% by weight of a-the weight of the metal paste. 5 . The metal paste according to claim 3 , wherein a content of a metal component including a metal in the metal nanoparticles and the metal particles is 90% by weight or more of the weight of the metal paste. 6 . The metal paste according to claim 5 , wherein the content of the metal component is 95% by weight or more of the metal paste. 7 . A metal paste for joining for joining members through a drying step and a burning step, wherein a shrinkage rate of the metal paste in a thickness direction is 20% or less in the drying step of drying at 120° C. for 30 minutes under an atmospheric pressure condition, and the shrinkage rate of the metal paste after the drying step in the thickness direction is 10% or less in the burning step of burning at 250° C. for 30 minutes under the atmospheric pressure condition. 8 . A metal paste for joining, wherein a total shrinkage rate of the metal paste in a thickness direction is 20% or less in a drying step of drying at 120° C. for 30 minutes under an atmospheric pressure condition and in a burning step of burning at 250° C. for 30 minutes under the atmospheric pressure condition after the drying step. 9 . A joining method, comprising: a coating step of coating the metal paste according to claim 1 on a first member; and a joining step of joining the first member and a second member, the joining step including a contact step of bringing the first member and the second member into contact, a drying step of drying the metal paste, and a burning step of burning the dried metal paste, the first member and the second member being joined by the drying step and the burning step. 10 . The joining method according to claim 9 , wherein the joining step is performed under no-pressure condition. 11 . A joined body joined according to the method according to claim 9 . 12 . A metal paste for the joining method according claim 9 , wherein a shrinkage rate of the metal paste in a thickness direction is 20% or less in the drying step of drying at 120° C. for 30 minutes under an atmospheric pressure condition, and a shrinkage rate of the metal paste after the drying step in the thickness direction is 10% or less in the burning step of burning at 250° C. for 30 minutes under the atmospheric pressure condition. 13 . A metal paste for the joining method according claim 9 , wherein a total shrinkage rate of the metal paste in a thickness direction is 20% or less in the drying step of drying at 120° C. for 30 minutes under an atmospheric pressure condition and in the burning step of burning at 250° C. for 30 minutes under the atmospheric pressure condition after the drying step.
Assignees
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Classifications
Connecting techniques · CPC title
Using a reflow oven · CPC title
Exothermic brazing · CPC title
- B23K35/025Primary
Pastes, creams or slurries · CPC title
Processes characterised by the sequence of their steps · CPC title
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Frequently asked questions
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- What does patent US2016121435A1 cover?
- A metal paste for joining includes aggregates of metal nanoparticles and a solvent, and an average particle size of the aggregates is 1 μm or more.
- Who is the assignee on this patent?
- Furukawa Masashi, Kobayashi Hiroomi, Shibata Yoshinori, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification B23K35/025. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu May 05 2016 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).