Importance

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Abstract

Method for producing a hermetically sealed casing, comprising the following steps:

a) supplying a ceramic substrate (20),b) supplying a metal surround (21) and placing it facing the said substrate (20),c) forming a first hermetically sealed joint (22) at the interface between the said substrate (20) and the said metal surround (21), in order to assemble them and form an assembly,d) superposing a cover (23) on the said assembly,e) forming a second hermetically sealed joint (24) between an upper face of the metal surround (21) which is the opposite face to the said interface, and the cover (23), in order to obtain the said casing,characterized in that, during step c), the first hermetically sealed joint (22) is formed on a portion of the said interface and in that prior to step c), the method involves an additional step consisting in placing a ceramic surround (25) on the upper face of the metal surround so as to partially cover the said face of the metal surround, the projected surface of the said ceramic surround in a plane of projection covering the projected surface of the said first joint in this same plane of projection.

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First Claim