Patent ID: 7492040

Claim:
Gas-tight package containing electronic or electrooptic components, comprising a substrate supporting the said components, a glass encapsulation lid applied to the substrate supporting the electronic or electrooptic components, and a seal placed at least around the periphery of the glass encapsulation lid and of the said substrate, so as to hermetically join the glass encapsulation lid to the substrate and to isolate the said components from the gas of the atmosphere, wherein the said lid comprises at least two glass layers of different compositions, a first layer called the bottom layer, which is continuous, and at least a second layer, which is discontinuous and designed so as to define cavities or anfractuosities in the said lid and inside the said package, designed also to form a peripheral glass projection, the said first layer forming the bottom of the said cavities or anfractuosities made in the said second layer, and wherein the said seal is applied to a top surface of the peripheral projection, and is made of an organic material and has a mean thickness less than 100 μm.