SLM filter system

A method for producing a hollow filter element (16) comprising a grid-like wall and a base plate (12), the method comprising:

• performing a generative selective laser melting (SLM) process comprising:
• solidifying a powdered starting material in selective locations, layer by layer at the selective locations (21) of each layer which correspond to the hollow filter element (16), wherein the solidifying comprises applying a focused laser radiation to the powdered starting material at the selective locations (21) of each layer, wherein the hollow filter element (16) comprises an empty space contained within the grid-like wall, and wherein said powdered starting material is selected from the group consisting of metal and ceramic powders;
• and
• producing a support ring (19) in one layer between a bottom layer and a top layer of the hollow filter element (16) by means of the generative SLM process,
• wherein the hollow filter element (16) is constructed on the base plate (12), wherein the base plate (12) has a hole (14) which is associated with the hollow filter element (16), wherein said hole is enclosed by the grid-like wall of the hollow filter element (16) which is adjacent to the base plate (12), and wherein said hole is arranged such that any fluid permeating the hollow filter element flows through said hole.