Method of manufacturing heat sink plate

Abstract

A heat sink manufacturing method includes the steps of positioning a heat conductive sheet on a lower half holding tool of a powder feeder; tightly closing and connecting an upper half holding tool of the power feeder to the lower half holding tool, such that spacers downward extended from the upper half holding tool are in tight contact with the heat conductive sheet; dispensing metal powder on the heat conductive sheet via a powder inlet on the upper half holding tool and under a positive pressure while vibrating the heat conducting sheet for the metal powder to uniformly distribute on the heat conductive sheet; opening the upper half holding tool and spraying an organic liquid on the metal powder for the same to set; and removing the heat conductive sheet from the lower half holding tool and sintering the metal powder to the heat conductive sheet.

1 . A method of manufacturing heat sink plate, comprising the steps of:
 positioning a heat conductive sheet on a lower half holding tool of a powder feeder;   tightly closing and connecting an upper half holding tool of the power feeder to the lower half holding tool;   dispensing metal powder on the heat conductive sheet while vibrating the heat conducting sheet, so that the metal powder is uniformly distributed on the heat conductive sheet; and   opening the upper half holding tool and removing the heat conductive sheet from the lower half holding tool, and sintering the metal powder to the heat conductive sheet.   
     
     
         2 . The method of manufacturing heat sink plate as claimed in  claim 1 , wherein the metal powder is dispensed on the heat conductive sheet under a positive pressure. 
     
     
         3 . The method of manufacturing heat sink plate as claimed in  claim 1 , wherein the upper half holding tool is provided with a powder inlet, and the metal powder is dispensed onto the heat conductive sheet via the powder inlet. 
     
     
         4 . The method of manufacturing heat sink plate as claimed in  claim 1 , further comprising a step of spraying an organic liquid on the metal powder uniformly distributed on the heat conductive sheet before the heat conductive sheet is removed from the lower half holding tool for sintering. 
     
     
         5 . The method of manufacturing heat sink plate as claimed in  claim 4 , wherein the organic liquid is a metal-powder-affinity liquid enabling the metal powder having the organic liquid sprayed thereon to set on the heat conductive sheet. 
     
     
         6 . The method of manufacturing heat sink plate as claimed in  claim 5 , wherein the organic liquid is selected from the group consisting of alcohol and acetone. 
     
     
         7 . The method of manufacturing heat sink plate as claimed in  claim 1 , wherein the upper half holding tool is provided on a lower side with a plurality of spacers, the spacers being in tight contact with the heat conductive sheet when the upper half holding tool is closed onto the lower half holding tool, such that a plurality of recesses are formed on the heat conductive sheet when the metal powder is distributed on the heat conductive sheet. 
     
     
         8 . The method of manufacturing heat sink plate as claimed in  claim 1 , wherein the metal powder is selected from the group consisting of copper powder and aluminum powder. 
     
     
         9 . The method of manufacturing heat sink plate as claimed in  claim 1 , further comprising a step of causing the powder feeder to drive the lower half holding tool to vibrate, so as to vibrate the heat conductive sheet, and a duration of vibrating the lower half holding tool being settable on the powder feeder. 
     
     
         10 . The method of manufacturing heat sink plate as claimed in  claim 1 , wherein the powder feeder includes a sliding mechanism provided below the lower half holding tool for moving the lower half holding tool into and out of the powder feeder in the process of manufacturing the heat sink plate.