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This section provides an overview for silver paste as well as their applications and principles. Also, please take a look at the list of 6 silver paste manufacturers and their company rankings. Here are the top-ranked silver paste companies as of December, 2024: 1.BNC Techno Solutions, 2.TAIYO HOLDINGS CO., LTD., 3.SHOEI CHEMICAL INC..
Table of Contents
Silver paste is a conductive adhesive consisting of silver particles dispersed in resin.
Solder is used as a conductive bonding method, but with solder the temperature must be raised to nearly 250°C, and the resin parts to be bonded are likely to be damaged by the heat.
On the other hand, silver paste can be sintered at temperatures as low as 100°C, thus minimizing damage to the material. It is often used for the purpose of conducting and fixing electronic components, such as capacitors, to the underlying substrate.
Silver paste can be sintered at low temperatures and is widely used for circuit boards of electronic devices, electrodes of displays, and piezoelectric components. In recent years, demand for flexible printed circuit boards (flexible printed wiring boards) has been increasing, and silver paste is used to create wiring on resin film. This type of wiring board can be made at a lower cost than copper foil laminated together.
In dye-sensitized solar cells, which are attracting attention as next-generation solar cells, silver paste is used to create wiring on transparent conductive glass in order to further enhance the conductivity of the conductive glass.
Silver paste is a method of obtaining conductivity by bringing the contained silver particles into contact with each other using a hardening reaction caused by heating a resin.
Epoxy resins are mainly used for silver paste, and the relationship between the structure and properties of epoxy resins has been analyzed, and curing agents have also been developed. The curing reaction of epoxy resin proceeds by polymerization reaction between epoxy and curing agent, enabling the creation of a strong three-dimensional bonded structure.
When amines are used as curing agents, polymerization proceeds through the reaction of amines with epoxy groups or amino groups with hydroxyl groups. The initial liquid state changes to a gel-like state with heating, and after a certain time, it transitions to a rubber-like state and finally to a glass-like state.
When the transition to glass is completed, the series of curing reactions is over. The temperature at which the transition to glass occurs is called the glass transition temperature.
As a conductive mechanism, micrometer-sized silver particles contact each other to conduct electricity. To ensure good electrical connection between particles, flat flake-shaped silver particles are generally used instead of spherical particles.
Upon heating, the silver particles are incorporated into the three-dimensional molecular structural changes of the epoxy resin. When heated, the entire material shrinks as it cures, allowing the silver particles to make contact with each other and thus acquire conductivity. In addition to silver particles, gold paste and nickel paste are also available.
There are many types of resins used as adhesives and conductive particles to be blended, and a great variety of conductive adhesives have been developed and sold in the market. It is necessary to make a selection in consideration of performance, application, cost, usage, and other factors.
Resins used include epoxy, phenol, acrylic, urethane, and silicone resins. For electronic component connection applications, heat reaction curing epoxy systems are the most common.
Epoxy adhesives are characterized by excellent adhesive strength to metals, high heat resistance, and low-volume shrinkage during curing. On the other hand, silver conductive particles are widely used as conductive particles. Silver is common in electronic materials because of its stable conductivity, resistance to oxidation, good storage stability, and high thermal conductivity.
Spherical or flake-shaped particles are used for silver conductive particles, and there are different types depending on the size of the particles and the amount of silver in the mixture, depending on performance.
The thermal conductivity of silver alone is very high at 429 W/mK, but the resin used is as low as 1 W/mK, so the overall thermal conductivity of epoxy silver paste is about 30 to 50 W/mK. To increase this thermal conductivity, it is necessary to increase the content of silver particles. However, the amount of resin content decreases accordingly, resulting in a significant decrease in adhesive strength, and manufacturing cost is also a concern.
Furthermore, if the average particle size of silver particles is too small, the issue of heat conduction paths cannot be secured, and if the average particle size of silver particles is too large, sintering becomes difficult. Therefore, in recent years, high thermal conductivity of silver paste with silver nanoparticles has been developed.
This is due to the fact that silver nanoparticles bond the silver particles together and create many paths for heat conduction. Products with thermal conductivity of about 240 W/mK are now available.
*Including some distributors, etc.
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TAIYO HOLDINGS CO. LTD., founded in Tokyo, Japan in 1953, is a manufacturer of chemical products, pharmaceuticals and insect feeds. The company's product portfolio includes etchants and cleaners, precision etching solutions for semiconductor fabrication and printed circuit boards, flux materials that enhance soldering quality, rotective coatings that safeguard electronic components from environmental factors, and cleaning agents and surface treatments. Their products are used in markets such as automotive and transportation, telecommunications, industrial automation, healthcare and medical devices and aerospace and defense.
Fujikura Kasei Co., Ltd., established in 1938, and based in Tokyo, Japan, is a manufacturer of advance materials and specialty chemicals. Its product range encompasses coatings/paints, electronic materials, chemical products, synthetic resins, and acrylic resin derivatives, catering to diverse industries like automotive, electronics, construction, and healthcare. The company holds various ISO certifications, including ISO 9001, ISO 13485 (for Medical Project Division), ISO 14001, and ISO 45001, underlining its adherence to quality, environmental responsibility, and workplace safety.
SHOEI CHEMICAL INC. established in April 1956 in Shinjuku-ku, Tokyo, Japan, is a manufacturer and supplier of electronic materials. The company's product range includes Silver Pastes, Gold Pastes, Resistive Pastes, Dielectric Pastes, and Fine Precious Metal Powders. These products are essential in devices like mobile phones, digital cameras, and liquid crystal televisions and are widely used in industries like audio-visual equipment, household appliances, automotive control devices, and communication devices. The company also offers services such as research and development, technical support, product customization, and application guidance.
Aritech Chemazone Pvt. Ltd is an Indian manufacturer and supplier of nanopowders, chemical solutions, and electrodes established in 2015, based in Kurukshetra, Haryana. The company produces advanced nanomaterials with applications in optoelectronics, artificial body fluids for medical testing, powdered metals for alloys, aqueous dispersions for chemical processing, and components such as electrodes, wafers, and targets for electronic devices. They supply their products globally and serve pharmaceutical, aerospace, semiconductor, agricultural, and energy industries.
BNC Techno Solutions, established in 2019 and headquartered in Pune, Maharashtra, India, is a manufacturer and supplier of shielding solutions. The company's product range includes Conductive Ink, Conductive Paint, EMI RF Shielding, EMI Shielding Glass and Mesh, and Conductive Paste and Grease. These products cater to industries such as electronics, automotive, and aerospace, providing effective EMI shielding solutions. Its services entail customized EMI shielding solutions and the manufacturing of EMI shielding products tailored to customer needs. BNC Techno Solutions aims to deliver quality shielding solutions and products. The company also holds an IndiaMART Certification, further attesting to its reliability.
FUKUDA METAL FOIL & POWDER CO., LTD. was established in 1935 and is a manufacturer and supplier of metal foils and metal powders, based in Yamashina, Kyoto, Japan. The company provides a diverse range of products, including metal foils, metal powders, and aluminum composite panels. These products find applications in various sectors, such as daily living, the automotive industry, and healthcare. Additionally, the company is accredited with multiple certifications, including ISO 9001 and ISO 14001.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | BNC Techno Solutions |
27.0%
|
| 2 | TAIYO HOLDINGS CO., LTD. |
21.6%
|
| 3 | SHOEI CHEMICAL INC. |
14.9%
|
| 4 | FUJIKURA KASEI CO.,LTD. |
13.5%
|
| 5 | Aritech Chemazone Pvt. Ltd |
12.2%
|
| 6 | FUKUDA METAL FOIL & POWDER CO., LTD. |
10.8%
|
Derivation Method
The ranking is calculated based on the click share within the silver paste page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
4 | 66.7% |
|
India
|
2 | 33.3% |
8 products found
8 products
Nagano Techtron Co., Ltd.
520+ people viewing
Last viewed: 6 hours ago
Very Fast Response
■Summary At our company, we use it as a paste for printed resistors. ・Carbon paste ・Silver paste We produce and sell two types in-house. Our pa...
2 models listed
Nagano Techtron Co., Ltd.
60+ people viewing
Last viewed: 9 hours ago
Very Fast Response
■Summary A silver paste manufactured with a unique formulation that is ideal for circuit printing. We have received orders from overseas customers ...
Kyocera Corporation
60+ people viewing
Last viewed: 39 minutes ago
We provide conductive pastes for semiconductors (power devices/LEDs)/electronic components for the cutting-edge device field. In particular, our si...
3 models listed
Nagase ChemteX Co., Ltd.
200+ people viewing
Last viewed: 1 hour ago
OAG-series is a silver nano ink that can be fired at 80℃ and exhibits good volume resistivity. Contains special high-density ingredients for void-f...
Toyo Technical Co., Ltd.
30+ people viewing
Last viewed: 1 day ago
This is a paste-like silver brazing filler metal made by American company FUSION, which is a mixture of metal, flux, and binder. Not only does it ...
