Not only does Array Solders fabricate a full line of solder materials but also fabricates gold preforms that are used in die attach and lid seal applications. It should be noted that gold tin (80au/20sn) and gold germanium (88au/12ge) is a eutectic alloy which means the melting point and the solidification point are the same at 278°C. 80au20sn and 88au12ge are considered high temperature solders and can also be classified as a brazing alloys.

Array Solders - Gold Preforms
Array Solders manufactures gold preforms used in die attach and hermetic sealing applications.

Gold Tin Facts (80au/20sn)

  • 40,000 PSI shear strength
  • 278°C melting point (eutectic)
  • Excellent thermal fatigue properties
  • Excellent sealing
  • RoHS compliant
  • Resistant to alkaline corrosion
  • High thermal conductivity 0.57 W/cmC @ 85°C
  • Low thermal coefficient of expansion 16ppm/cmC @ 85°C

Available Forms

  • Washers
  • Ribbon
  • Lids
  • Rectangles
  • Squares
  • Discs
  • Customized

Gold Germanium Facts (88au/12ge)

  • 356°C melting point
  • Excellent creep resistance
  • Excellent thermal conductivity
  • 185000 tensile strength
  • CTE, linear 7.22 µin/in-°F @Temperature
Array Solders - Solder Lids for Hermetic Packaging
Array Solders manufactures gold tin solder lids used in die attach and hermetic sealing applications.

Gold Preforms are Used in the Following Applications

  • Heat sinks
  • Lead frames
  • Microelectronic packaging
  • Lead pins
  • Wetting Laser Optics
  • Sealing laser optics
  • Thermal interfaces

Gold Preforms Process Advantages

  • Typically gold preforms does not require any flux or chemical acid etch treatment
  • Flows well on gold plated substrates
  • Does not scavenge gold
  • Excellent cosmetic appearance
  • Gold preforms can be tack welded onto lids so that lids can be obtained with positioned preforms called combo lids

Available in the Following Forms

  • Washers
  • Ribbon
  • Lids
  • Rectangles
  • Squares
  • Discs
  • Customized
  • Wire

Please note that minimum thickness differs depending on the dimensions and characteristics of the preform in question.