Metal treatment – Stock – Amorphous – i.e. – glassy
Reexamination Certificate
2005-08-12
2009-12-08
Wyszomierski, George (Department: 1793)
Metal treatment
Stock
Amorphous, i.e., glassy
C148S561000, C228S262100
Reexamination Certificate
active
07628871
ABSTRACT:
High strength, reliable bulk metallic glass (BMG) solder materials formed from alloys possessing deep eutectics with asymmetric liquidous slopes. BMG solder materials are stronger and have a higher elastic modulus than, and therefore are less likely than crystalline solder materials to damage fragile low k interlayer dielectric (ILD) materials due to thermal stress in materials with different coefficients of thermal expansion (CTE).BMG solder materials may physically, electrically, or thermally couple a feature to another feature, or any combination thereof. For example, in an embodiment of the invention, a BMG solder material may physically and electrically couple an electronic component to a printed circuit board. In another embodiment of the invention, a BMG solder material may physically and thermally couple an integrated heat sink to a semiconductor device.Many embodiments of a BMG solder material are also lead-free, so they comply with lead-free product requirements, while providing a better solution than other lead-free solder materials such as tin-silver-copper.
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Blakely , Sokoloff, Taylor & Zafman LLP
Intel Corporation
Shevin Mark L
Wyszomierski George
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