Microstructured filter

A nebulizer for inhalation therapy, the nebulizer comprising a microstructured filter having an inlet for unfiltered fluid and an outlet for filtered fluid, the filter comprising:

• a substantially flat base plate and a cover plate that is securable thereto,
• a plurality of projections that each comprise an integral component of the base plate and which each project therefrom, the projections being spaced from one another by passages that form a fluid path through the filter from the inlet to the outlet, the cover plate when secured to the base plate covering the projections and the passages;
• wherein the plurality of projections form at least one row which is arranged in a meander configuration in a mutually juxtaposed relationship across the filter;
• and
• wherein the passages have a length of 5 μm to 50 μm, a height of 2.5 μm to 25 μm, and a width of 2.5 μm to 25 μm.