Protective cap for thermal grease of heat sink

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.

1 . A protective cap for enclosing thermal grease spread on a base plate of a heat sink, comprising:
 a cover plate; and   a plurality of strengthening ribs formed on the cover plate to resist the heat sink for preventing the thermal grease from being pressed against the cover plate.   
   
   
       2 . The protective cap of  claim 1 , wherein a side plate extends from a perimeter of the cover plate, the cover plate and the side plate cooperatively form a cavity to cover the base plate; the strengthening ribs extend to an inside space of the cavity. 
   
   
       3 . The protective cap of  claim 2 , wherein the strengthening ribs extend to connect with the side plate. 
   
   
       4 . The protective cap of  claim 1 , wherein the strengthening ribs are positioned at corners of the cover plate. 
   
   
       5 . A heat sink for dissipating heat generated by a heat source, comprising:
 a base plate having a bottom face and configured to contact the heat source;   thermal grease applied on the bottom face; and   a protective cap for enclosing thermal grease comprising a cover plate and a plurality of strengthening ribs positioned on the cover plate to resist the bottom face for preventing the thermal grease from being pressed against the cover plate.   
   
   
       6 . The heat sink of  claim 5 , wherein a side plate extends from a perimeter of the cover plate, the cover plate and the side plate cooperatively form a cavity to cover the base plate; the strengthening ribs extend to an inside space of the cavity. 
   
   
       7 . The heat sink of  claim 6 , wherein the strengthening ribs extend to connect with the side plate. 
   
   
       8 . The heat sink of  claim 6 , further comprising a plurality of heat pipes positioned on a top face of the base plate; the side plate comprises a plurality of cutouts corresponding to the plurality of heat pipes; the plurality of heat pipes are received in the cutouts to fix the protective cap onto the heat sink. 
   
   
       9 . The heat sink of  claim 5 , wherein the cover plate has a shape similar to a shape of the bottom face, the strengthening ribs are positioned at corners of the cover plate; the thermal grease is spread in a middle portion of the bottom face. 
   
   
       10 . The heat sink of  claim 5 , wherein a height of the strengthening ribs is larger than a height of the thermal grease.