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Method for a spherically shaped heatsink configuration for reducing EMI radiation in a high-speed signaling environment

IP.com Disclosure Number: IPCOM000023831D
Publication Date: 2004-Mar-31
Document File: 4 page(s) / 183K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a spherically shaped heatsink configuration for reducing electromagnetic interference (EMI) radiation in a high-speed signaling environment. Benefits include improved functionality and improved performance.

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Method for a spherically shaped heatsink configuration for reducing EMI radiation in a high-speed signaling environment

Disclosed is a method for a spherically shaped heatsink configuration for reducing electromagnetic interference (EMI) radiation in a high-speed signaling environment. Benefits include improved functionality and improved performance.

Background

         Strong electromagnetic (EM) emission can be caused by sharp corners from heatsinks in a typical central processing unit (CPU) package. The strong EM radiation violates the Federal Communication Commission (FCC) requirement and causes design process delay. This problem is exacerbated when products operate with an extremely high clock speed and extremely high currents (see Figure 1). The angles around 0, 60, 120, 180 produce very strong radiation (see Figure 2).

         EM emission must meet the FCC standards. When frequency and current increase, devices and systems generate more electromagnetic radiation. If the emission exceeds FCC standards, the product cannot be sold, blocking the whole design/manufacturing process.

Conventionally, the problem is solved by increasing the shielding structure to reduce the radiation.

General description

         The disclosed method is a spherically shaped heatsink for the reduction of EMI radiation. It solves the problem for EM emission by reconfiguring the heatsink in a spherical module. Because the strongest radiation is generated by sharp corners, this modification reduces the strongest radiation....