Flux and solder paste
US-2024278360-A1 · Aug 22, 2024 · US
Flux and solder paste
US12220771B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12220771-B2 |
| Application number | US-202218560992-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 27, 2022 |
| Priority date | May 31, 2021 |
| Publication date | Feb 11, 2025 |
| Grant date | Feb 11, 2025 |
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- Title
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Abstract
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Provided herein is a flux which contains a rosin, a rosin amine; one or more types of organic sulfonic acid selected from the group consisting of an alkane sulfonic acid, an alkanol sulfonic acid, and an aromatic sulfonic acid, a thixotropic agent, and a solvent, wherein: the rosin content is 5-50 mass %, inclusive, of the total amount (100 mass %) of the flux, the rosin content is 5-30 mass %, inclusive, of the total amount (100 mass %) of the flux, the organic sulfonic acid content is 0.2-10 mass %, inclusive, of the total amount (100 mass %) of the flux, and the proportion (mass ratio) of the rosin amine content to the organic sulfonic acid content is 3.33-10, inclusive.
First claim
Opening claim text (preview).
The invention claimed is: 1. A flux comprising: a rosin; a rosin amine; p-toluenesulfonic acid; a thixotropic agent; and a solvent, wherein a content of the rosin is 5% by mass or more and 50% by mass or less with respect to a total amount (100% by mass) of the flux, a content of the rosin amine is 5% by mass or more and 30% by mass or less with respect to the total amount (100% by mass) of the flux, a content of the p-toluenesulfonic acid acid is 0.2% by mass or more and 10% by mass or less with respect to the total amount (100% by mass) of the flux, a ratio (mass ratio) of the content of the rosin amine to the content of the p-toluenesulfonic acid is 3.33 or more and 10 or less. 2. A flux comprising: a rosin; one or more azole selected from the group consisting of 2-ethylimidazole and 2-phenyl-4-methylimidazole; p-toluenesulfonic acid; a thixotropic agent; and a solvent, wherein a content of the rosin is 5% by mass or more and 50% by mass or less with respect to a total amount (100% by mass) of the flux, a content of the azole is 1% by mass or more and 10% by mass or less with respect to the total amount (100% by mass) of the flux, a content of the p-toluenesulfonic acid acid is 0.2% by mass or more and 10% by mass or less with respect to the total amount (100% by mass) of the flux, a ratio (mass ratio) of the content of the azole to the content of the p-toluenesulfonic acid acid is 1 or more and 3 or less. 3. A flux comprising: a rosin; ditolylguanidine; p-toluenesulfonic acid; a thixotropic agent; and a solvent, wherein a content of the rosin is 5% by mass or more and 50% by mass or less with respect to a total amount (100% by mass) of the flux, a content of the ditolylguanidine is 2% by mass or more and 20% by mass or less with respect to the total amount (100% by mass) of the flux, a content of the p-toluenesulfonic acid acid is 0.2% by mass or more and 10% by mass or less with respect to the total amount (100% by mass) of the flux, a ratio (mass ratio) of the content of the ditolylguanidine to the content of the p-toluenesulfonic acid acid is 1.66 or more and 5 or less. 4. A solder paste comprising: a solder alloy powder; and the flux of claim 1 . 5. The flux according to claim 1 , wherein a total content of the solvent in the flux is 40% by mass or more and 80% by mass or less with respect to the total amount (100% by mass) of the flux. 6. A solder paste comprising: a solder alloy powder; and the flux of claim 2 . 7. The flux according to claim 2 , wherein a total content of the solvent in the flux is 40% by mass or more and 80% by mass or less with respect to the total amount (100% by mass) of the flux. 8. A solder paste comprising: a solder alloy powder; and the flux of claim 3 . 9. The flux according to claim 3 , wherein a total content of the solvent in the flux is 40% by mass or more and 80% by mass or less with respect to the total amount (100% by mass) of the flux.
Assignees
Inventors
Classifications
Selection of compositions of fluxes (B23K35/365, B23K35/368 take precedence) · CPC title
- B23K35/025Primary
Pastes, creams or slurries · CPC title
Alloys based on tin · CPC title
with the principal constituent melting at less than 400°C · CPC title
Sn as the principal constituent · CPC title
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Frequently asked questions
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- What does patent US12220771B2 cover?
- Provided herein is a flux which contains a rosin, a rosin amine; one or more types of organic sulfonic acid selected from the group consisting of an alkane sulfonic acid, an alkanol sulfonic acid, and an aromatic sulfonic acid, a thixotropic agent, and a solvent, wherein: the rosin content is 5-50 mass %, inclusive, of the total amount (100 mass %) of the flux, the rosin content is 5-30 mass %,…
- Who is the assignee on this patent?
- Senju Metal Industry Co
- 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 Tue Feb 11 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).