High-reliability clad metal for ceramic packaging, including AgCu15/4J29 and AgCu28/4J29, engineered for transistors, FETs, and vacuum electronics.
When it comes to semiconductor and electronic packaging, material reliability makes the difference between long-term performance and premature failure. For applications such as ceramic packaging of transistors, relays, and field-effect transistors, engineers need materials that offer strength, solderability, conductivity, and resistance to oxidation—all in one package.
That’s where clad metal for ceramic packaging comes in. At Hebei Yuguang Welding Co., Ltd, we produce advanced AgCu/Kovar composite clad materials specifically designed for ceramic and vacuum electronic applications. These materials meet the demanding standards of the electronics industry, delivering the reliability that modern communication, instrumentation, and aerospace systems require.
Our key products include:
AgCu15/4J29: A precision clad material where Ag-Cu solder alloy is bonded onto Kovar (4J29) alloy.
AgCu28/4J29: Higher silver content version designed for enhanced conductivity and solderability.
These composites combine:
4J29 (Kovar) – Known for its low thermal expansion and strong mechanical stability, essential for electronic packaging.
AgCu solder alloy – Provides excellent wetting, solderability, and electrical conductivity.
High Reliability – Engineered to meet strict reliability standards in semiconductor and vacuum electronics.
Solderability – AgCu layers provide consistent solder performance, ensuring secure electrical connections.
Mechanical Stability – Kovar core maintains structural integrity under heat cycles and mechanical stress.
Corrosion & Oxidation Resistance – Ensures long service life even in harsh operating environments.
Precision Bonding – Our clad technology eliminates delamination risks, guaranteeing uniform performance.
Transistor Packaging – Especially suitable for ceramic-packaged transistors requiring reliable bonding.
Field Effect Transistors (FETs) – Helps solve solder positioning issues during manufacturing.
Relays – Used in signal relays for communication, fire prevention, and instrumentation equipment.
Vacuum Electronics – Widely used in electric vacuum components requiring high reliability.
Aerospace & Defense Electronics – Critical in systems where failure is not an option.
Compared with plating: Clad metals provide stronger bonding with no risk of peeling or uneven coating.
Compared with solid alloys: Combines the strengths of multiple materials—conductivity, solderability, and stability—while keeping costs under control.
Compared with conventional soldering solutions: Enhanced precision and repeatability for high-tech manufacturing.
Items Available: AgCu15/4J29, AgCu28/4J29
Forms: Coils, sheets, and custom cut parts
Bonding Methods: Advanced roll bonding and precision metallurgical joining
Testing: Rigorous reliability testing under thermal cycling, oxidation, and soldering trials
All products undergo trial use evaluations, and customer feedback confirms they meet or exceed industry demands.
Reduced Manufacturing Complexity – Strong metallurgical bonding ensures easier assembly and lower failure rates.
Improved Product Yield – Better solder joint integrity reduces rework.
Extended Product Lifespan – Devices built with AgCu/Kovar clad materials maintain stable performance for years.
Scalable Supply – From small batch samples to bulk orders for OEM production.
With over 20 years in clad metals manufacturing, we are a trusted China supplier for industries ranging from electronics, power, automotive, to aerospace. Our team provides:
OEM & ODM services
Strict quality control with pre-production and final inspections
Custom material ratios to match customer requirements
Global supply to clients across North America, Europe, and Asia
For engineers and manufacturers looking for high-reliability materials for ceramic packaging, AgCu/Kovar clad metal solutions from Hebei Yuguang Welding Co., Ltd deliver proven performance. Whether you need AgCu15/4J29 for standard applications or AgCu28/4J29 for higher conductivity demands, our materials are ready to support your production.
Contact us today to discuss specifications, request samples, or explore custom solutions for your semiconductor and vacuum electronics packaging needs.
Hebei Yuguang Welding Co., Ltd. offers a range of cookware materials, including 2ply, 3ply, 4ply, 5ply, and up to 9ply configurations. We provide various clad metals such as copper clad stainless steel, stainless steel-aluminum composites, and multi-ply circles.
2ply copper clad metal offers excellent thermal conductivity, even heat distribution, and a non-reactive stainless steel interior. This ensures precise cooking, enhanced durability, and an attractive appearance while avoiding metallic flavors or toxins.
The standard thickness for our 2ply copper circles includes a 0.2mm stainless steel layer and a 2.3mm thick solid copper plate. These specifications ensure optimal heat conduction and durability.
Yes, we offer customization options for sizes and thicknesses to meet your specific needs. Free samples are also available upon request.
The 7ply configuration includes layers such as 304 stainless steel, multiple aluminum layers, and 430 stainless steel. This design provides enhanced thermal conductivity, durability, induction compatibility, and a visually appealing finish.
Multi-ply cookware conducts heat rapidly and efficiently, reducing cooking times and saving energy. This efficient heat distribution helps maintain consistent temperatures while cooking.
Our multi-ply circles are suitable for use with gas, induction, ceramic, and electric cookers, providing versatility in your cooking methods.
Our cookware materials are designed to produce less greasy smoke when frying, contributing to a cleaner cooking environment and reducing overall environmental impact.
Multi-ply circles combine the advantages of different metals, such as improved thermal efficiency, durability, and resistance to corrosion, while potentially reducing costs. This results in high-performance cookware with a balanced cost structure.
To request a sample, you can contact us directly through our website or customer service channels. We offer free samples to allow you to evaluate the quality and performance of our products before making a purchase.
In the competitive world of high-end cookware, copper clad stainless steel cookware discs have emerged as a game-changer, offering unparalleled thermal performance and aesthetic appeal.
An Indian cookware factory has become a significant purchaser of our advanced cookware materials. They primarily source our 3-ply cookware materials, composed of SS304 stainless
A major European cookware manufacturer has become a key buyer of our 3-ply cookware materials, which feature a composition of SS304 stainless steel, an aluminum
A prestigious American cookware brand has chosen our 5-ply cookware materials, featuring a composition of SS304 stainless steel, three layers of aluminum, and SS430 stainless
A renowned European cookware brand factory has become a key purchaser of our premium copper series composite cookware materials. They specifically source our 5-ply copper
Last year, a newly established cookware factory from Southeast Asia discovered our company’s high-quality composite cookware materials through our website. Intrigued by our reputation, they
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