From smartphones to computers, and from servers to automobiles, PCBs serve as the “skeleton” of electronic products, while conductive pastes are one of the key materials for forming PCB circuitry.
In applications such as flexible printed circuits (FPCs), fine-line circuits, and irregular‑shaped circuit boards, conductive pastes can be directly screen‑printed onto the substrate to form conductive traces, replacing conventional copper‑foil etching processes and significantly shortening production cycles while reducing costs. Moreover, conductive copper pastes can facilitate interlayer interconnections in double‑sided circuit boards via through‑hole plating, making them one of the core technologies driving the multilayering of PCBs.
Drawing on more than two decades of expertise in new materials technology, Betely has developed a comprehensive conductive paste solution tailored to diverse application scenarios—including FPCs, membrane switches, and medical diagnostics—balancing reliability, manufacturing efficiency, and cost competitiveness to fully meet the current demands of PCB industry upgrades.
I. Halogen-Free Flexible Silver Paste | SF-2196 Series
In applications such as flexible printed circuit boards, membrane switches, and computer keyboards, circuits must withstand repeated bending without failure. The SF-2196 series is specifically engineered for high‑flexibility environments, offering exceptional resistance to flexing fatigue and outstanding oxidation resistance.
| Model number |
Sheet resistance |
Number of bend cycles |
Curing conditions |
| SF-2196-FY |
≤9.5 mΩ/□ |
≥10 times |
150℃ × 60 min |
| SF-2196T-A |
≤11 mΩ/□ |
≥10 times |
150℃ × 60 min |
| SF-2196K |
≤12 mΩ/□ |
≥10 times |
150℃ × 8 min |
Application areas: blood glucose test strips, membrane switches, computer keyboards
Features: Halogen-free and environmentally friendly, with excellent adhesion to substrates such as PET, PI, and TPU.
II. Fast-Drying Flexible Silver Paste | SF-12XX Series
High‑throughput production lines demand maximum efficiency, and curing speed directly determines output capacity. The SF‑12XX series is specifically engineered for fast‑curing applications.
| Model number |
Sheet resistance |
Curing conditions |
| SF-1255 Series |
≤13 mΩ/□ |
150℃ × 4 min |
| SF-1288 Series |
≤20 mΩ/□ |
150℃ × 60–90 s |
Application areas: blood glucose test strips, membrane switches, computer keyboards
Features: The SF-1288 series enables ultra-fast curing in 60–90 seconds and is compatible with automated production lines.
III. Flexible Conductive Silver-Copper Paste | SF-1300 and SF-2700 Series
Silver prices remain at elevated levels, driving up the cost of silver paste. How can we help customers reduce costs while maintaining electrical conductivity? Silver–copper paste offers the solution.
| Model number |
Sheet resistance |
Key Features |
| SF-1300 |
≤15 mΩ/□ |
Low-temperature, fast-drying; compatible with a wide range of flexible substrates. |
| SF-2700-A |
6~10 mΩ/□ |
Ultra-high electrical conductivity, weld‑pull strength ≥ 10 N, coating hardness ≥ 4H. |
| SF-2700-C |
11~14 mΩ/□ |
Balanced compatibility between conductivity and bend‑resistance performance |
Application areas: membrane switches, blood glucose test strips
Features: A silver–copper composite formulation that maintains excellent electrical conductivity while reducing costs.
At its core, the price hike in copper-clad laminates stems from a surge in demand for high-end PCBs driven by AI‑powered computing. Rising PCB demand, in turn, fuels growth in the market for conductive pastes; meanwhile, higher silver prices are further accelerating the adoption of silver‑copper pastes. This reflects a demand‑driven dynamic at the industry level.
Specifically in the manufacturing process: in applications such as FPCs, fine-line circuits, and plated‑through holes, conductive pastes are indispensable materials for PCB fabrication—whether it’s the high‑flexibility performance of the SF‑2196 series, the ultra‑fast curing of the SF‑12XX series, or the cost‑reducing alternatives offered by the SF‑2700 series, each is helping PCB manufacturers meet today’s challenges.
