High Reliability Solder Pastes for Die Attach

The die attach process remains a key step in the manufacture of power packages and high reliability automotive devices to ensure product reliability. Heraeus die attach solder pastes are the right choice when high operating temperatures require high melting points for the solder connection.

Solder Pastes for Die Attach

Harsher conditions, higher currents and rising customer expectations continuously increase the reliability requirements for crucial aspects such as solder connections. Frequent on/off cycling is a challenge for the die attach and often leads to thermal and mechanical fatigue defects. To maximize reliability, engineers must identify the optimum combination of material performance and properties.

Since solder pastes for die attach are used in high temperature applications, there are several special demands on the flux: The flux system has to vaporize slowly when temperature rises during reflow soldering. The flux must be able to protect the alloy powders and must not burn at >300°C or leave charred residues which are difficult to remove.

Heraeus solder paste flux systems for high-temperature-high-lead alloys are engineered to provide adequate protection to the powders. This minimizes voids and leaves minimal residues after solvent clean.

Formulated in halogen-free or zero-halogen options, Heraeus high lead solder paste for die attach applications is compliant to RoHS requirements for halides.

Heraeus highly trained field service engineers work closely with customers to accelerate development and processes for faster turn-around-time in order to complete product qualifications.

Our manufacturing locations spread across the world in Romania, Singapore and China support your solder materials needs. Save time and money with Heraeus as a qualified partner and accelerate your process.

Your benefits at a glance:

  • Outstanding reliability of the solder joint
  • Very low void rate (typically <5% single) in the solder joint for highest reliability
  • Perfect cleanability of the residues for perfect results
  • Excellent printing and dispensing behavior for smooth manufacturing
  • Good tackiness and superior soldering properties for a good workability of the paste
  • Heraeus pastes are available in halogen-free and zero-halogen options and are compliant to RoHS reuqirements for halides

Your benefits in working with Heraeus:

  • Pretested solutions due to our in-house application centre
  • Exactly the right solution for your application, adapted to your needs


  • Infotainment
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Power electronics in industrial use:

  • Power switches
  • Voltage regulators
  • IGBTs
  • DC to DC converters


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  • RF power
  • Sensors