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Method for an IHS with a continuously-coated ribbon feed

IP.com Disclosure Number: IPCOM000101676D
Publication Date: 2005-Mar-16
Document File: 2 page(s) / 43K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for an integrated heat spreader (IHS) with a continuously-coated ribbon feed. Benefits include improved functionality, improved performance, and improved cost effectiveness. Integral heat spreaders are used to keep electronic devices (e.g. CPUs) cool.

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Method for an IHS with a continuously-coated ribbon feed

Disclosed is a method for an integrated heat spreader (IHS) with a continuously-coated ribbon feed. Benefits include improved functionality, improved performance, and improved cost effectiveness.  Integral heat spreaders are used to keep electronic devices (e.g. CPUs) cool.

Background

              Heat spreaders used in solder thermal interface material (STIM) packages require a gold area on the IHS cavity to enhance solderability. Conventionally, the gold is applied using automated gold plating machines. Gold plating occurs directly onto the IHS cavity (where the silicon die is attached). However, this process is slow and the cost of equipment is high.

              The U.S. Mint uses stamping from a clad coil to produce coins. The stamping process is more cost effective than plating individual coined units.

General description

              The disclosed method is an IHS that is created directly from a preplated copper strip with a nickel surface for good sealant adhesion and a solderable surface, such as gold.

              The key elements of the method include:

•             Copper strip coated (by any method) with nickel and/or gold and/or solder (any solder composition)

•             Stamping step that creates an IHS from the copper strip

•             Depression in the IHS lip (optional)

Advantages

              The disclosed method provides advantages, including:

•             Improved functionality due to producing an IHS by...