Patent ID: 6888719

Claim:
An apparatus for transferring heat from a microelectronic device, comprising: a first heat transfer portion positioned to face toward a first surface of a microelectronic device module; a second heat transfer portion positioned to face toward a second surface of the microelectronic device module, the second heat transfer portion facing generally opposite from the first heat transfer portion, at least a part of the first heat transfer portion being spaced apart from the second heat transfer portion to receive the microelectronic device module; an intermediate portion disposed between the first and second heat transfer portions; a first heat transfer fin having a first length and extending away from at least one of the first heat transfer portion, the second heat transfer portion and the intermediate portion; and a second heat transfer fin extending away from at least one of the first heat transfer portion, the second heat transfer portion and the intermediate portion, the second heat transfer fin having a second length different than the first length.