Patent ID: 7059186

Claim:
An integrated flow sensor for determining a fluid flow, comprising: a first function layer; a second function layer applied to the first function layer and being electrically connected thereto, wherein: a fluid channel is situated in the first function layer and the second function layer to conduct a fluid flow, at least one heating region and at least one measuring region are provided adjacent to the fluid channel, the first function layer is one of not covered by the second function layer in the at least one heating region and in the at least one measuring region and is insulated from the second function layer, one of the first function layer and the second function layer has an increased resistance at least in the at least one heating region, the flow sensor can be connected in such a way that the flow sensor at least one of: conducts a heating current through one of the first function layer and the second function layer of the at least one heating region, and measures a resistance value of one of the first function layer and the second function layer in the at least one measuring region, and the fluid flow can be determined as a function of one of the measured resistance value at a constant heat output and a required heat output at a predefined resistance value.