Flux formulations

Patent metadata

Field	Value
Publication number	US-9751159-B2
Application number	US-201615390861-A
Country	US
Kind code	B2
Filing date	Dec 27, 2016
Priority date	Jan 4, 2007
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Flux formulations that remain pliable and tack-free after deposition are disclosed. In certain examples, the flux comprises a first component and an effective amount of a second component to provide a pliable flux after deposition. The flux may also include activators, plasticizers, surface active agents and other components.

First claim

What is claimed is:

1. A flux, comprising:
a resin or a rosin first component;
an effective amount of a second component to provide pliability to the flux upon deposition to a substrate; and
a third component selected from the group consisting of carboxylic acids, sulfonic acids, phospohonic acids, phosphate esters, amino acids, alkanoamines, halide bearing compounds, and combinations thereof, wherein the third component comprises adipic acid.

2. The flux of claim 1 , wherein the second component comprises an oligomeric or polymeric component.

3. The flux of claim 2 , wherein the second component comprises a polyamide, an acrylic, an ethylene acrylic co-polymer, or a mixture thereof.

4. The flux of claim 1 , wherein the first component comprises an activated rosin adduct or a rosin ether.

5. The flux of claim 1 , wherein the third component is present in an effective amount to reduce formation of chemical species on the substrate.

6. The flux of claim 5 , further comprising a fourth component present in an effective amount to render the flux soft prior to or after deposition on the substrate.

7. The flux of claim 6 , in which the fourth component is a plasticizer or a surface active agent.

8. The flux of claim 1 , in which an amount of the first component and an amount of the second component are independently selected to provide an adherent flux.

9. The flux of claim 1 , further comprising a reactive diluent.

10. The flux of claim 1 , further comprising a colorant.

11. The flux of claim 1 , further comprising a photosensitive material.

12. The flux of claim 1 , further comprising a binder.

13. The flux of claim 1 , further comprising a surface active agent.

14. The flux of claim 1 , wherein the flux is substantially tack-free upon drying on the substrate.

15. The flux according to claim 1 , wherein the third component additionally comprises suberic acid.

16. The flux according to claim 7 , wherein the plasticizer is selected from the group consisting of phthalate-based plasticizers, adipate-based plasticizers, trimellitates, maleates, sebacates, benzoates, epoxidized vegetable oils, sulfonamides, organophosphates, glycols, polyethers and various ethylene oxide-propylene oxide (EO/PO) copolymers.

17. The flux according to claim 9 , wherein the reactive diluent is polypropyleneglycol diglycidyl ether.

Assignees

• Alpha Assembly Solutions Inc

Inventors

• Pujari Narahari
• Arora Sanyogita
• Sarkar Siuli
• Lifton Anna
• Raut Rahul
• Singh Bawa

Classifications

• B23K2101/42

  Printed circuits · CPC title

• B23K35/3618

  Carboxylic acids or salts · CPC title

• B23K35/3612

  with organic compounds as principal constituents · CPC title

• B23K35/3613

  Polymers, e.g. resins · CPC title

• C08L93/04

  Rosin · CPC title