Patent ID: 7700457

Claim:
A method of sealing two substrates in a microstructure comprising the following steps: depositing a first rim onto a surface of a first substrate, said first rim comprising an upper rim comprising a layer of sealing material that interfuses spontaneously with a material of a second substrate and a lower rim comprising an adhesion material that adheres said first substrate with said sealing material; depositing a second rim onto said second substrate facing said first rim, said second rim comprising a layer of said sealing material; wherein said second rim overlies a surface of at least one protuberance on said second substrate, the at least one protuberance having a plurality of hollows or a meshed structure and adapted to channel the diffusion of said sealing material; bringing said upper rim and said second rim into contact; and heating said sealing material to interfuse said sealing material and said material of said second substrate, wherein the hollows or meshed structure of the at least one protuberance channel the diffusion of said sealing material and substantially prevent the sealing material from lateral discharge.