Shock resistant bearing for a timepiece

A method for manufacturing a shock resistant bearing including an elastic structure and a central portion carried by said elastic structure, said central portion having a blind hole intended to receive a pivot of a rotating wheel set of the timepiece, the elastic structure and the central portion being formed by one single-piece part, said method comprising:

• A) making a single crystal quartz wafer whose two main faces, respectively the first and second faces, are substantially oriented perpendicularly to the optical axis of the crystalline structure of the single crystal quartz;
• B) forming a first initial mask on the first face of the single crystal quartz wafer, said first mask being structured by photolithography so as to define on said first face the contour of said elastic structure but not the contour of said blind hole;
• C) partially machining said elastic structure, defined by the first initial mask, in said single crystal quartz wafer by placing said wafer in a chemical etching bath adapted for an anisotropic etch of single crystal quartz greatly facilitating an etch along said optical axis, said first initial mask being selected to resist the etch of said chemical etching bath;
• D) structuring said first initial mask so as to define the contour of said blind hole and to obtain a first final mask;
• E) final machining of said elastic structure and simultaneous machining of said blind hole, in said single crystal quartz wafer by placing said wafer in said chemical etching bath again.