Decorative panels are manufactured by cutting out profiled shaped-pieces, using a numerically-controlled water-jet cutting machine. The mask no longer needs to be defined with a width sufficiently large to account for the overlay of two distinct and relatively critical masks. A variety of material deposition, layering, etching and cleaning techniques are used to micromachine this lab-on-chip device. The pair of third shape portions come into engagement with the engagement arms when the component positioned between the pair of second shape portions is rotated through a predetermined angle.