Date: Thu, 20 Nov 1997 22:30:01 GMT Server: Stronghold/1.3.2 Ben-SSL/1.3 Apache/1.1.1 Content-type: text/html Content-length: 17665 Last-modified: Tue, 15 Jul 1997 19:54:36 GMT Products and Services

Product & ServicesWilliams Advanced Materials

Vapor Deposition Products and Services
High purity precious metals, broad capabilities, fully integrated facilities.
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  • Sputtering Targets
  • Evaporation Materials
  • Backing Plates, Accessories & Consumables
  • Analytical Capabilities
  • Upgrading/Recycling

Bonding Wire and Ribbon
Advantages of extrusion.
Fewer reductions
With hydrostatic extrusion, die friction is extremely low. Only four to five diamond dies are required to reduce a 1/4 inch diameter billet to 0.001 inch diameter. Fewer reductions assure cleanliness from the very start.

Other Advantages of the Unique Super-Clean Hydrostatic Extrusion Process:

  • Elimination of imperfections by extreme fluid pressures, which envelop the metal, as it passes through the die.
  • Smaller, more uniform ball sizes on smaller pads.
  • Consistent squash characteristics.
  • Higher strength to eliminate tailing problems and erratic wire breakage.
  • Reduced bonding tool problems.

High Performance Packaging Materials
A variety of innovative products - backed by technical expertise to meet your exact requirements

POWER STRAPS-Made of OFHC copper plated with 50 microinches of gold, available in a variety of commonly used shapes and dozens of sizes. Power straps are used in both microwave and power hybrids. We can custom make any configuration to fit your needs.

MOLY TABS-Used extensively in the hybrid and discrete semiconductor packaging industries. Most often Moly tabs are used as "heat spreaders." A Moly tab used as a die mount acts as a thermal conductor to remove heat from the die quickly and evenly.

BONDING PADS-A Williams innovation, also called jumper chips or grounding pads. bonding pads eliminate several problems associated with bonding aluminum wire. We are tooled for dozens of standard sizes and can easily accommodate your custom shapes.

BUSS BARS-Used exclusively in hybrid circuits. As the name implies, buss bars are used as a multiple device bonding pad. All of our buss bars are custom made to your design specifications including thickness, planar dimensions and solder type.

Frame Lid Assemblies
Combination Lid/Preform Assemblies manufactured to the tightest specifications.
  • Gold and nickel-plated Kovar or Alloy 42 lids with pre-attached gold-tin frame preforms.
  • Proven high yields in production.
  • Meet U.S. Military Specifications for high reliability - MIL SPEC 883
  • Hermetically seal ceramic packages.
  • Excellent for P.G.A.'s, side braze packages, chip carriers and flat packs.
  • Extensive tooling library and readily available new tool delivery capability.

Solder
  • Extensive tool library
  • Typical forms: ribbon, preforms, rod
  • Quality:
    • -High-purity materials
      -Casting: vacuum, induction, continuous casting with protective atmosphere
      -State-of-the-art thickness control
      -SPC of key variables
      -In-house tool design and fabrication
  • Analytical capabilities
    Extensive testing capabilities include:
    • -Plasma emission spectroscopy (ICAP)
      -Emission spectroscopy - qualitative and trace
      -ICP mass spec
      -SEM
      -Carbon and Oxygen Analyzer
      -Complete mechanical testing
  • Experience
    Leader in custom alloy production and precious metal refining for over 85 years.
  • High Temperature Brazing Alloys
    Our braze materials are available in a variety of shapes and forms including ribbon, preform, rod, ring and wire. Cutom shapes can also be produced using our state-of-the-art design and fabrication equipment.

    Refining Services
    Uniquely qualified to deliver the maximum return from your precious metals scrap.
    • The Technology - State-of-the-art technology, including the most advanced analytical equipment and recovery procedures and methods.
    • The Accountability - Experts in the field, with vast experience in the identification, collection, segregation and recovery of every scrap dollar.
    • The Knowledge - A producer of precious and other special metals for a variety of industries requiring extremely high purities including microelectronics, semiconductor, and vacuum deposition and evaporation. We understand your purity requirements.
    • The Experience - A leading refiner and recycler with more than 85 years of precious metals experience.

    2978 Main Street
    Buffalo, NY 14214
    Tel: (716) 837-1000
    Fax: (716) 833-2926