Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Conductive silver paste for on-paper printing and preparation method thereof

A technology of conductive silver paste and flake silver powder, which is used in printed circuit parts, conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, etc. , reducing the strength of insulating paper, etc., to achieve the effect of safe and reliable circuit, good printability, and easy curing and molding

Active Publication Date: 2015-10-07
SHANGHAI RADIO EQUIP RES INST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The film thickness and printing performance of the paste made of the existing silver paste have great limitations on the printed circuit on the insulating paper: the silver-based paste in the field of electronic paste, because its solvent will penetrate the insulation paper, which reduces the strength of insulating paper. In addition, the particle size of the silver powder in the slurry and the accumulation and bonding force of the resin are not suitable for the use of insulating paper.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of conductive silver paste of the present invention may further comprise the steps:

[0035] ⑴ Sieve flake silver powder with a 400-mesh copper mesh sieve;

[0036] (2) Weigh flake silver powder, polyester drying insulating varnish, melamine resin, oleic acid, dioctyl phthalate according to the formula requirements, put them into the same beaker, and stir well with a glass rod;

[0037] (3) Weigh diethylene glycol butyl ether, pour it into the above mixture, and mix evenly with a glass rod;

[0038] ⑷ Pour the mixture into a ball mill and mix and disperse for more than 1 hour until the viscosity of the silver paste is 2800 centipoise.

Embodiment 1-4

[0041] Examples 1-4 used the above-mentioned preparation method to prepare conductive silver paste, and its raw material formula and test results are shown in Table 1.

[0042] Table 1: Raw material formula and test result of embodiment 1-4

[0043]

[0044] The formula of embodiment 1-4 prepares silver paste according to above-mentioned method. Print the obtained silver paste on the insulating paper by screen printing, and then heat it up to 120°C and cure it for 8 hours to form a conductive circuit with a resistivity of 4.9×10-5Ω·cm. According to the above method, 1,000 insulating paper lines are produced in batches. The conductive lines are well combined with the insulating paper, the lines are clear and continuous, and the yield rate is 100%.

[0045] The silver paste of the present invention combines silver powder, paint, resin, and a small amount of additives and solvents to make the silver powder tightly bonded, has excellent electrical conductivity, and is easy to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a conductive silver paste for on-paper printing and a preparation method thereof. The conductive silver paste is prepared by the following raw materials by weight: 65 to 80 of flake silver powder, 5 to 15 of polyester baking insulating varnish, 5 to 10 of melamine resin, 1 to 2 of oleic acid, 0.1 to 0.5 of dioctyl phthalate and 2 to 8 of diethylene glycol monobutyl ether. The conductive silver paste preparation method comprises steps: 1, all raw materials expect diethylene glycol monobutyl ether are mixed thoroughly; 2, diethylene glycol monobutyl ether is weighed and poured in the mixture, and uniform mixing is realized after stirring; and 3, the uniformly-mixed material in the second step is mixed and dispersed to enable viscosity of the silver paste to be 2800 centipoise. The conductive silver paste of the invention is excellent in conductive performance, lead-free, environmentally-friendly and easy to curve and form through tight combination between the silver powder and the resin; and the silver paste has a proper viscosity, on-paper printing is good, the printing precision is high, the circuit is safe and firm, breaking is not easy, and technical requirements on flexible circuits by aerospace products can be met.

Description

technical field [0001] The invention belongs to the technical field of electronic paste, and relates to a high-temperature-resistant conductive silver paste used on insulating paper and a preparation method thereof. Background technique [0002] In the existing field of electronic pastes, silver-based pastes have the advantages of high conductivity and stable performance, and are widely used in the production of electronic components such as integrated circuits, multi-chip components, and membrane switches. The substrate materials are generally flat materials. or film. Silver is a precious metal with a high cost. The film thickness and printing performance of the paste made of the existing silver paste have great limitations on the printed circuit on the insulating paper: the silver-based paste in the field of electronic paste, because its solvent will penetrate the insulation Paper reduces the strength of insulating paper. In addition, the particle size of silver powder i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H05K1/09
Inventor 周丽
Owner SHANGHAI RADIO EQUIP RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com