Patent ID: 7420648

Claim:
A method of manufacturing at least one device defining a volume for retaining a fluid or a sensitive material that is capable of changing its physical properties, particularly its optical properties, via the application of a voltage, or its electrical properties via stress or radiation, said device including at least a first front substrate and at least a second back substrate maintained at a constant distance from each other, these two substrates being joined by a sealing joint which defines the volume for retaining the sensitive medium or fluid, wherein said method includes the following steps in the sequence set forth: structuring on one of the substrates, at least one filling channel defined by an inner wall and an outer wall, which extend at a distance from each other, the inner wall defining via its inner lateral face the volume for retaining the sensitive medium or fluid, wherein the outer wall surrounds the inner wall; joining the second substrate to the first substrate; introducing a sealing material capable of flowing into the filling channel until the entire volume of said filling channel is occupied, and solidifying the sealing material so that the latter forms the sealing joint.