a folded fin member 115 is shown having a generally oval shape the folded fin member is shown coupled to a generally circular base 118 in fig9 a 9c and is shown couple dot a generally square base in fig1 a 10c as shown in fig9 b and 10c the folded fin member can be disposed such that a first portion of the folded fin member is at a different v horizontal height than another portion of the fodled fin member this orientation provides additional cooling as a gas source may be couples to provide gas in a generally horizontal direction to impinge on the fins it may be desirable or necessary to provide folded fin member 115 as a single unitary piece or as more than one piece the particular number of pieces from which the folded fin member 115 is provided may be selected in accordance with a variety of factors including but not limited to the particular application the amount of heat which must be transferred away from heat generating devices and the amount of space available for mounting of the heatsink and other components as shown in fig5 a gas supply source 190 is coupled to the folded fin member 115 and the heat generating device 180 the gas supply source 190 may be a fan a blower or a compressed gas source and supplies gas to the folded fin member 115 and to the slug the heatsink assembly 110 may be coupled to any type of integrated circuit package including but not limited to dual in line packages dip leadless chip carriers leaded chip carriers flat packs pin grid arrays as well as other surface mount packages and small.