Attachment method using anodic bonding
AssigneeSy & SE SA
InventorsSébastien Brun, Michael Stuer
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Abstract
The invention relates to an anodic bonding method for bonding two elements with an intermediate layer. The invention especially, but not exclusively, relates to an anodic bonding method for between a metallic element and a heterogeneous element, for example a glass, artificial sapphire or ceramic element. The specificity and aim of the present invention is to produce an assembly that is gas-tight and fluid-tight, solderless, brazing- or welder-free and without organic compound (glue). The present method has multiple industrial applications, including making it possible to attach a watch-glass, typically made of mineral glass, sapphire or transparent or translucent ceramics, to a bezel or case middle of a watch case using the anodic bonding technique.
Claims12
An anodic bonding method between a first substrate and a second substrate comprising:
- interposing an intermediate layer between the first and second substrates;
- assembly of the substrates at a determined bonding temperature;
- application of an electric voltage between the first and the second substrate,
- wherein said electric voltage comprises a pulsed or AC component with a frequency greater than 100 Hz, and in that said bonding temperature is less than 300° C.
Dependencies are inferred from the claim text.