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Protective cap for thermal grease of heat sink

a technology of protective cap and heat sink, which is applied in the direction of lighting and heating apparatus, semiconductor devices, and semiconductor/solid-state device details, etc., can solve the problems of affecting the heat conductivity between the heat sink and the cpu module, contaminating surrounding objects, and not being able to directly apply thermal greas

Inactive Publication Date: 2009-10-15
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermal grease cannot be directly applied to the heat sink in advance because it is not solid at ambient temperature, may contaminate surrounding articles, or be contaminated by dust or foreign particles before the heat sink is mounted to the CPU module.
The protective caps are commonly made of plastic and may twist under pressure, and press against the thermal grease, affecting the heat conductivity between the heat sink and the CPU module.

Method used

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  • Protective cap for thermal grease of heat sink
  • Protective cap for thermal grease of heat sink
  • Protective cap for thermal grease of heat sink

Examples

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Embodiment Construction

[0009]FIG. 1 is an isometric view of an embodiment of a protective cap 30 for thermal grease 15 applied on a heat sink 10. The heat sink 10 includes a metallic base plate 11 and a plurality of metallic heat dissipating fins 14 positioned on a top face of the base plate 11. A bottom face 113 is configured to contact a heat source. The thermal grease 15 is spread on a middle portion of the bottom face 113. Corners of the base plate 11 have no thermal grease. Two heat pipes 13 are positioned between the base plate 11 and the heat dissipating fins 14.

[0010]The protective cap 30 includes a cover plate 31 having a shape similar to a shape of the bottom face 113. A side plate 32 extends from the perimeter of the cover plate 31. The cover plate 31 and the side plate 32 cooperatively form a cavity to cover the base plate 11. A plurality of strengthening ribs 33 are formed at corners of the cover plate 31 and extend to an inside space of the cavity to connect with the side plate 32. The stren...

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PUM

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Abstract

A protective cap for use with a heat sink, includes a cover plate for enclosing thermal grease on the heat sink, and a plurality of strengthening ribs positioned on the cover plate. The strengthening ribs resist the heat sink to prevent the thermal grease from being pressed against the cover plate.

Description

BACKGROUND[0001]1. Technical Field[0002]The present invention relates to a heat sink having a removable protective cap for enclosing thermal grease on the heat sink.[0003]2. Description of Related Art[0004]A heat sinks is typically used to dissipate heat generated by a central processing unit (CPU). Thermal grease may be applied to a bottom surface of the heat sink before being mounted to a CPU module to improve heat conductivity between the heat sink and the CPU module. However, thermal grease cannot be directly applied to the heat sink in advance because it is not solid at ambient temperature, may contaminate surrounding articles, or be contaminated by dust or foreign particles before the heat sink is mounted to the CPU module. A removable protective cap for enclosing thermal grease, disclosed in U.S. Pat. No. 6,049,458, includes a periphery removably attached to a bottom surface of a heat sink around the thermal grease, and a middle protrusion defining a cavity receiving the ther...

Claims

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Application Information

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IPC IPC(8): F28F7/00
CPCH01L23/367H01L23/3672H01L23/4006H01L23/427H01L2924/0002H01L2924/3011H01L2924/00F28F2265/02
Inventor XU, LI-FUWANG, NING-YUZHANG, ZHI-GUO
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD