The Swatch Group Research and Development Ltd

Asulab S.a.

Giancarlo Poli

Christian Verdon

Gilles Derriey

Stewes Bourban

Rudolf Dinger

Steve Bourban

A transparent substrate made of a transparent material resistant to temperatures higher than 500&#xb0; C., such as sapphire, includes recesses in at least one of its faces and/or a groove machined into its thickness, that are covered with opaque, translucent or transparent enamel depositions that may or may not be colored, depending upon the pigments used in the enamel composition.

Technical or decorative piece associating a transparent material and a silicon based amorphous material and method of manufacturing the same

A transparent substrate () made of a transparent material resistant to temperatures higher than 500&#xb0; C., such as sapphire, includes recesses () in at least one of its faces () and/or a groove () machined into its thickness, that are covered with opaque, translucent or transparent enamel depositions (to) that may or may not be colored, depending upon the pigments used in the enamel composition. The invention is applicable to a dial of a timepiece.

The crystal (), in the inner surface of which contact zones () are structured, includes close to its edge a hollow () machined in one of its faces () or a groove () machined in its thickness and provided with an enamel deposition () for concealing said contact zones () after bonding.

Growing community of inventors

Les Geneveys-sur-Coffrane, Switzerland

Giancarlo Poli