Patent ID: 7132721

Claim:
A Micro-Electro-Mechanical System (MEMS) comprising in combination: a substrate comprising a base; a micro-machine coupled to the substrate; and a cover coupled to the substrate, the cover mounted over the micro-machine, wherein the cover and the micro-machine are coupled to the substrate by forming at least one bond between the cover and the substrate and between the micro-machine and the substrate, wherein the cover, the micro-machine, and the substrate each have mating surfaces at which the at least one bond is formed, and wherein the at least one bond is formed by: depositing a first layer of mating material on a first mating surface; depositing a first layer of bonding material on the first layer of mating material, wherein the first layer of bonding material is selected from the group consisting of gold and tin; depositing a second layer of mating material on a second mating surface; depositing a second layer of bonding material on the second layer of mating material, wherein the second layer of bonding material is selected from the group consisting of indium and lead; and pressing the first layer of bonding material to the second layer of bonding material, thereby forming an alloy to serve as the at least one bond between the mating surfaces of the cover and the substrate and between the mating surfaces of the micro-machine and the substrate.