Apparatus and method for the application of prescribed, predicted, and controlled contact pressure on wires
AssigneeVenture Lending & Leasing IV, Inc.
InventorEphraim Suhir
Life of this patent
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Abstract
The mechanical behavior of wires subjected to axial loading and experiencing bending deformation is used to ensure effective control of the contact pressure in mechanical and/or heat removing devices, and similar structures and systems. An apparatus for taking advantage of the characteristics of wires in packaging of a device, such as a semiconductor device, is disclosed. Methods for the prediction of such a behavior for pre-buckling, buckling, and post-buckling conditions in wires, carbon nanotubes (CNTs), and similar wire-grid-array (WGA) structures, for example are also disclosed.
Claims36
An apparatus for the efficient removal of heat from a hot surface comprising:
- an anchoring surface wherein the root portions of each of a plurality of wires is anchored to said anchoring surface, the wires being grown from the root portions, enabling the conduction of the heat through said plurality of wires away from the hot surface;
- a base inside of which said anchoring surface is mounted, such that a free end of at least one of said plurality of wires peers above side walls of said base;
- and
- means for applying axial forces to the free ends of said plurality of wires to create a contact pressure that cause bending deformation of at least one of said plurality of wires against said hot surface when said base is forced against said hot surface;
- wherein application of said axial forces increases any of:
- the number of wires from said plurality of wires having thermal contact to said hot surface, and thermal contact area between said hot surface and said at least one of said plurality of wires, and wherein said contact pressure is controlled, predetermined, and predicted in an approach which is one of:
- deterministic or probabilistic.
A heat removing apparatus, comprising:
- a compartment comprising of heat conducting material and having sidewalls;
- an anchoring surface placed inside of said compartment;
- and
- a plurality of wires grown from said anchoring surface from root positions, each of said plurality of wires enabling the conduction of heat through said plurality of wires, free end of at least one of said plurality of wires peering above the sidewalls of said compartment;
- wherein application of axial forces causes a bending deformation of the free end of at least one of said plurality of wires when said free end is in at a contact point with a hot surface, thereby increasing any of:
- the number of wires from said plurality of wires having thermal contact to said hot surface, and the thermal contact area between said hot surface and said at least one of said plurality of wires, and wherein said contact pressure is controlled, predetermined, and predicted in an approach which is one of:
- deterministic or probabilistic.
A method for applying a contact pressure on a wire that is controlled, predetermined, and predicted, in a deterministic or probabilistic approach, the method comprising the steps of:
- growing a plurality of wires on an anchoring surface, each wire growing from a root portion, said plurality of wires enabling the conduction of heat through said plurality of wires away from a hot surface;
- placing said anchoring surface in a compartment made of a heat conducting material and having sidewalls, wherein the free end of at least one of said plurality of wires peers above said sidewalls;
- and
- applying an axial force on said at least one of said plurality of wires to cause a bending deformation of the free end of at least one of said plurality of wires when said free end is in at a contact point with a hot surface, thereby increasing any of:
- the number of wires from said plurality of wires having thermal contact to said hot surface, and the thermal contact area between said hot surface and said at least one of said plurality of wires.
Dependencies are inferred from the claim text.