Heraeus AlSi:Bond – Roll Clad Strips

Electronic components have to handle a steadily increasing amount of functions in the tiniest of spaces. At the same time, power transmission must work optimally at the interfaces and the heat must be dissipated quickly and efficiently.

Roll Clad Strips

Roll clad strips bring ideal conditions for exactly this topic. The combination of thick wire, bonding ribbons and AlSi roll clad materials permits particularly flexible thermal as well as electrical connections and thus a good heat dissipation while simultaneously making use of the widest process windows.

As a specialist with many years of experience in the production of roll clad strips, we develop the ideal solution for your requirements. We supply you with matched materials that meet the highest demands – particularly with regard to such growing requirements as surface cleanliness, for example.

Your technical challenges drive us forward. Talk to us. Our specialist are eager to invest their knowledge into your project.

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Roll cladding at Heraeus

Whenever materials reach their limits due to physical or chemical properties, roll clad strips from Heraeus could be your solution. The combination of different materials unites the advantages of each material in a multi-layer system.

You therefore enjoy the benefits of all materials used. With our broad materials and process portfolio and our expertise, we ensure that our product is a perfect match for your customer-specific requirement.

Your benefits at a glance:

  • Aluminium wire bonding in a mono-metal system
  • Aluminium-silicon surface enables a large bonding process window, in particular when compared to electroplated bond surfaces
  • High-performance for strong currents
  • Robust for high-end applications
  • Highest reliability – experience since 1978, proven in millions of cars
  • Optimal material properties due to the combination of matched materials
  • Wide range of design possibilities with regard to the geometrical arrangement of the materials used
  • A high surface cleanliness can be reached due to optimized manufacturing processes
  • Compliant with legal regulations, including Reach and RoHS conformity

Our service for you:

  • We invest in your innovation with our research projects.
  • Experienced engineers and developers offer you customized advice regarding the design as well as the selection of materials and technologies.
  • In our Technology Center we use different methods to carry out extensive material tests for you.
Roll Clad Strips

The fields of application for roll clad strips are extremely diverse. They are used for the assembly and packaging technology in the area of electronic components.

Power electronics in industrial use:

Our roll clad strips meet the highest demands in power electronic modules. In the industry, these modules are used, for example, in electric drive systems, as inverters, or for energy supplies:

  • Trains
  • Electric industrial vehicles (e.g. motor drives for forklifts)
  • Renewable energies (inverters for wind, water, and sun)
  • Electric power substations
  • Ships (motor drive, steering, energy supply)
  • Elevators and escalators

Automotive (control devices and sensors):

  • Engine management (Engine Control Units ECU)
  • Transmission controllers
  • Braking, steering and stability systems (ABS, ESP, EPS / EPAS)
  • Pressure sensors (power brakes, differential pressure for air ducts and exhaust emission, airflow meters)
  • Power electronic modules for the electrification of the drive train (electric and hybrid vehicles)
  • Alternator control unit
  • Bi-material terminal for aluminium cabling within the vehicle


  • Radio frequency antenna modules for mobile communication
Roll Clad Strips

Carrier materials:

  • Pure copper (e.g. PHC-Cu)
  • CuSn alloys
  • CuBe2
  • CuFe2
  • Steel (e.g. 1.4301)
  • Aluminium and its alloys
  • Various special alloys (e.g. Kovar, Invar)
  • CuNiSi

Surface finishing:

  • Precious metal alloys
  • Copper and its alloys
  • Nickel
  • Tin
  • Aluminium
  • Aluminium-Silicon
  • Stainless steel

Other material combinations upon request.

Coating processes:

  • Onlay-cladding
  • Overlay-cladding
  • Inlay-cladding