The method for manufacturing a timepiece component (10) having at least one first portion with at least one functional flank, for transmitting energy to another component or dissipating energy from another component, and at least one second portion with a guide surface,

includes carrying out a first micro-injection (E1) forming a blank (10) of the timepiece component, the blank having the at least one first portion and the at least one functional flank and a blank of the second portion,
then a second machining (E2), particularly a second laser machining, in particular femtosecond laser machining, of at least part of the blank of the timepiece component, this part including the blank of the second portion for forming the second portion with the guide surface.

The present disclosure relates to a case assembly for a ceramic timepiece. The case assembly is configured to accommodate a movement which includes a first groove, defining an inner periphery of a first side of the casing. The first groove accommodates a glass of the timepiece, within a thickness of the casing. Further one or more provisions are provided in a second side of the casing, where each of the one or more provisions is configured to receive an adapter. Each of the adapter receives a fastening member, for securing a back plate of the timepiece within the height of the casing. A dial including a pair of projections extending outwardly from two opposing portions of an outer periphery of the casing is provided to receive a strap of the timepiece. The configuration of the dial helps in reducing the thickness of the timepiece.

A method for heat treating a horological component includes the following steps: heating of the component by irradiation, using a laser beam, of at least 80% or at least 90% of the projected surface of the component parallel to the direction of the laser beam, and cooling of the component in a gas stream.

A method for fabrication of a piece including, superposing an electrically insulating layer including a first orifice, an additional layer including a first aperture, an intermediate layer including a first hole, and a base layer surmounted by a base motif, depositing a metal layer, so that at the end of this step, the metal layer forms a shell covering electrically conductive walls of the base motif, of the first orifice, of the first aperture and of the first hole, and includes a lateral area resting on the insulating layer, dissolving the insulating layer, coating the metal or alloy layer with a volume formed by a base material of the piece, so that the volume conforms to the shapes of the metal layer.

The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.

The method for manufacturing a timepiece movement component (1) having at least a first portion comprising a surface (11), in particular an upper surface, includes etching (E3) the surface (11) of the timepiece movement component (1) or of a blank (1a) of the timepiece movement component (1) in order to form at least one cavity (7); and depositing a material (E4) in the at least one cavity (7).

A component for the internal parts or the movement for a timepiece or a piece of jewellery including a substrate partially coated with a black layer and decorated with at least one stone, the black layer including carbon nanotubes or aluminium oxide, the substrate being at least devoid of the black layer on the portion facing the stone. It also relates to the method for manufacturing this component for the timepiece or the piece of jewellery.

Timepiece component based on a micromachinable material, including at least one micromachinable-material surface portion that is smoothed at least by hydrogen smoothing. The at least one micromachinable-material surface portion includes an oxide layer of thickness larger than 1 micron in order to increase its mechanical strength. In a particular embodiment the micromachinable material can be silicon and the oxide layer silicon oxide.

A method for decorating a dial includes deeply digging and forming a first groove by repeatedly scanning, in a predetermined scanning direction, a place where laser light is applied to a base material. In the scanning, a depth of the first groove is controlled by the number of irradiation times that the laser light is applied. An area where a depth of the first groove is shallow and an area where a depth of the first groove is deep are present according to the number of irradiation times.

A balance-spring intended to equip a balance of an horological movement, comprising a core made of NbTi made from an alloy consisting of: niobium: balance to 100% by weight, titanium: between 5 and 95% by weight, traces of elements chosen from the group consisting of O, H, C, Fe, Ta, N, Ni, Si, Cu, Al, each of said elements being present in a quantity between 0 and 1600 ppm by weight, the total quantity formed by all of said elements being between 0% and 0.3% by weight, wherein the core made of NbTi is coated with a layer of niobium, said layer of niobium having a thickness between 20 nm and 10 ?m.