A layer-forming antireflective composition is proposed which contains as a base polymer poly or polybenzoxazole and as dye component at least one dye from the classes of the methine dyes, methine dye derivatives, azomethine dyes, azomethine dye derivatives, coumarin dyes, coumarin dye derivatives, triphenylmethane dyes, triphenylmethane dye derivatives andor an azo dye. The suspension includes a proximal actuator mounting region, a rigid beam region, and a spring region or spring legs between the actuator mounting and beam regions. An insulating layer is formed on the electrode, as well as the support board or solder resist layer, and a wiring portion connected to the electrode at the insulating layer is also formed. , silicon nitride, above a silicon substrate, providing an opening in the oxidation barrier region and in any underlying regions deposited on the silicon, providing a trench in the silicon substrate at the opening, depositing a dielectric material such as silicon dioxide in the trench, typically planarizing the trench silicon dioxide, and subsequently performing an oxidation step. Portions being locked 18b are provided in the fuse casing 18 to engage the locking-portions 11d and 16b on the upper and lower casing members 11 and 16. In particular, there is provided a method and system for tuning the shape of the power profile of an output optical signal and its position with respect to a channel bit clock of an optical recording system.