Patent ID: 7226862

Claim:
A method of producing a fluid device with a fluid structure having an active height, said method comprising the following steps: providing a basic wafer comprising a supporting substrate, an intermediate layer on the supporting substrate and a to be patterned layer on the supporting substrate, the thickness of the to be patterned layer determining the active height of the fluid structure, said intermediate layer being of such a material that it is essentially not impaired by a patterning step to pattern the to be patterned layer; p 1 patterning the to be patterned layer so as to obtain a patterned layer and to produce the fluid structure of the fluid device, the fluid structure extending from a first surface of the patterned layer to the intermediate layer; attaching a first transparent wafer so that the fluid structure is covered; removing the supporting substrate and the intermediate layer so that the fluid structure is exposed at a second surface of the patterned layer; and attaching a second transparent wafer so that the fluid structure is covered.