Mechanical wristwatch components manufactured using the UV-LIGA technology
The figure shows mechanical wristwatch components manufactured using the UV-LIGA technology. The new technology more than doubles dimensional accuracy over traditional machining processes. It also enables fine through-hole pattern forming to reduce weight. The surface roughness of the sidewall of UV-LIGA parts is less than 1/5 that of parts manufactured using traditional machining, producing an extreme smoothness that improves energy efficiency. Enhanced processing accuracy and micro-fabrication techniques improve basic functions, including time keeping accuracy and service life. The new technology also makes it possible to form complex mechanisms, including tourbillons.*
*Tourbillon: An escapement mechanism developed to overcome timekeeping errors caused by changes in the orientation of a mechanical wristwatch.
