IGBT

Die-Attach

Indium Corporation manufactures die-attach solder paste, such as Indium8.9-LDA, for vacuum soldering. Indium Corporation's IGBT die-attach solder paste can be screen printed or stencil printed and is easy to clean.

Indium Corporation also provides solder ribbon and solder preforms for die-attach applications. Tape & reel packaging allows preforms to be advanced and placed with speed and accuracy. Semiconductor-grade ribbon and preforms come in ultra-pure alloys and adaptable packaging, such as tape & reel, custom spools, and cartridge packs, to increase productivity, performance, and efficiencies.

All material is recyclable and reclaimable.

Materials for Vacuum Soldering

• IGBT solder paste
• Solder wire
• Solder preforms
• Solder ribbon

Direct Bonded Copper (DBC) or Substrate-Attach

Indium Corporation's soldering materials for DBC-attach include solder ribbon and solder preforms. Manufactured for purity, they offer low voiding when reflowed in air or vacuum.

InFORMS^® were developed to solve the non-planar solder joint issue common in substrate bonding. InFORMS^® are reinforced solder alloy fabrications that ensure parallel soldering at a predetermined bondline thickness.

NanoFoil^® solders a component in nanoseconds without using a reflow oven. NanoFoil^® provides a localized heat source that enables high strength, high conductivity bonding between most combinations of materials. NanoFoil^® emits enough energy to solder 25-150+ micron bondlines. In addition, tin-plated NanoFoil has been used to solder gold-plated substrates together without the need for a reflow oven or any plating. For more information, visit www.indium.com/nanofoil/.

Materials for Substrate-Attach

• Solder preforms
• InFORMS^®
• Solder ribbon
• Solder paste
• NanoFoil^®

Heat-Sink or Baseplate-Attach

Removing heat from a power module is important for ensuring interconnect reliability. Indium Corporation's Heat-Spring^® material is a non-reflow compressible metal pad with a thermal conductivity of 86W/mK. Unlike some of the more typical thermal interface materials, such as thermal grease, Heat-Springs^® do not pump out or bake out.

Heat-Springs^® can be engineered and optimized for difficult applications and a wide variety of surface conditions. Minimum pressure required is 25-45psi and minimum thickness is 75 microns. Custom packaging includes tape & reel and tray packs. See our application note entitled "Heat-Spring^® Metallic Thermal Interface Materials for Application to Infineon Technologies AG PrimePACK IGBT Modules" for information on how Indium Corporation's Heat-Springs^® performed in testing against a comparable flat indium shim and two typical silicone-based thermal grease materials.

Liquid metal is another material that can be used as a thermal interface. Liquid metal is RoHS-compliant and has a thermal conductivity of 40W/mK and a contact resistance of virtually zero.

Materials for Heat-Sink or Baseplate-Attach

• Heat-Spring^® - Type D (for flat surfaces)
• Liquid metal