Conductive adhesive for LED encapsulation and preparation method thereof
A technology of LED packaging and conductive adhesive, which is applied in the direction of circuits, adhesives, electrical components, etc., can solve the problem that the conductive adhesive does not adapt to the rapidly growing demand of the LED industry, and achieve the goals of accelerating curing speed, improving thermal conductivity, and optimizing electrical conductivity Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0021] An embodiment of the present invention provides a conductive adhesive for LED packaging and a preparation method thereof, which have excellent electrical conductivity and extremely high shear strength. The conductive adhesive for LED packaging includes:
[0022] 13~16.5wt.% resin system, 0.9~1.4wt.% dicyandiamide curing system, 0.1~0.35wt.% short chain dibasic acid, 65~72wt.% silver powder, 5~8wt.% low melting point alloy powder, 1-1.5wt.% graphene powder, and 4.5-10wt.% other additives.
[0023] In one embodiment, the resin system includes one or a combination of bisphenol A type epoxy resin, phenolic epoxy resin, and bisphenol F type resin.
[0024] In one embodiment, the content of the resin system is preferably 16 wt.%.
[0025] In one embodiment, the content of the dicyandiamide curing system is preferably 1.3 wt.%.
[0026] In one embodiment, the short-chain dibasic acid includes one or a combination of succinic acid, glutaric acid, and adipic acid.
[0027] In...
Example Embodiment
[0034] Example 1
[0035] 65wt.% silver powder, 8wt.% tin-bismuth alloy powder, and 1wt.% graphene powder are mixed uniformly, ground and dried, and then calcined at 650-700 °C for 2 hours in a reducing atmosphere to obtain an alloy mixed with graphene powder powder;
[0036] Take 16.5wt.% bisphenol A epoxy resin, 1.4wt.% dicyandiamide, 0.35wt.% succinic acid, and 3.5wt.% defoamer, dispersant, and coupling agent, mix well, add slowly The alloy powder prepared above is stirred, and the bubbles are removed by vacuum to obtain a conductive adhesive for LED packaging.
[0037] After testing, the conductive adhesive of this embodiment can be stored at room temperature for 3 months, cured at 185 ° C for 55 minutes, and the resistivity after curing is 1.25*10 -4Ω cm, the thermal conductivity is 10.25W / (m·K), and the shear strength is 18.4MPa.
Example Embodiment
[0038] Example 2
[0039] 70wt.% silver powder, 5wt.% tin-bismuth alloy powder, and 1.5wt.% graphene powder were mixed uniformly, ground and dried, and then calcined at 650-700°C for 2 hours in a reducing atmosphere to obtain a graphene powder mixed with graphene powder. alloy powder;
[0040] Take 15wt.% phenolic epoxy resin, 0.9wt.% dicyandiamide, 0.1wt.% glutaric acid, and 7.5wt.% defoamer, dispersant, and coupling agent and mix them evenly, and slowly add the prepared The alloy powder is stirred, and the bubbles are removed by vacuum to obtain a conductive adhesive for LED packaging.
PUM
Property | Measurement | Unit |
---|---|---|
The average particle size | aaaaa | aaaaa |
Resistivity | aaaaa | aaaaa |
Thermal conductivity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap