Patent ID: 8246902

Claim:
A method for manufacturing a plate-type heat pipe comprising: providing a mold comprising a first cavity and a plurality of second cavities located at a top of the first cavity and communicating with the first cavity; depositing a plurality of cores into the mold, each of the cores having a first portion located at the first cavity of the mold and a second portion extending from the first portion into one of the second cavities of the mold, the first and second portions of the cores being spaced from the mold a distance; filling a first metal powder and a second metal powder respectively into the first and second cavities of the mold in such a manner that the first metal powder is adhered on an inner surface of the mold and spaced from the cores, the second metal powder is filled within interval between the first metal powder and the cores, and interval between the first portions of the cores; removing the cores from the mold to form a green piece by the first and second metal powder, wherein the green piece has a number of first and second chambers therein; sintering the green piece with the first and second chambers defined therein to obtain a sintered work piece, wherein the sintered work piece has a heat absorbing portion with the first chambers and a number of fins extending upwardly from a top side of the heat absorbing portion, each of the fins has one of the second chambers which communicates with the first chamber; vacuuming the first and second chambers; injecting working fluid into the first and second chambers via a port in the sintered work piece; and sealing the port of the sintered work piece.