Patent ID: 7365981

Claim:
A fluid-cooled electronic system comprising: a base including a fluid inlet and a fluid outlet; an electronic device connected to said base between said fluid inlet and said fluid outlet, said electronic device including a plurality of microchannels extending substantially parallel to a fluid line between said fluid inlet and said fluid outlet; a cap attached to said base about said electronic device, said fluid inlet, and said fluid outlet to form a fluid containment chamber that receives cooling fluid through said fluid inlet for cooling said electronic device and exhausts said cooling fluid through said fluid outlet, said cap being peripherally spaced from said electronic device to define a fluid inlet volume between said fluid inlet and an inlet of said microchannels, a fluid outlet volume between said fluid outlet and an outlet of said microchannels, side gaps between said cap and each side of said electronic device, and a top gap between said cap and a top surface of said electronic device; and a first baffle material disposed in said top gap, said first baffle material having a contracted state when not exposed to said cooling fluid and a swollen state when exposed to said cooling fluid for restricting a flow of said cooling fluid through said top gap and thereby increasing a proportion of said cooling fluid that flows through said microchannels.