USE OF A DISPENSER ATTACHMENT FOR A DEVICE FOR WRITING 3D STRUCTURES BY MEANS OF LASER LITHOGRAPHY, AND DISPENSER ATTACHMENT

1 - 15 . (canceled)

16 . A Use of a dispenser attachment for microscope objective lenses, in a device for writing three-dimensional structures by means of laser lithography in a lithographic fluid, which can be solidified by irradiation with laser light, the device including at least the following: a laser beam source for emitting a writing beam, a substrate for receiving lithographic fluid, an objective lens for forming a focus region of the writing beam in the lithographic fluid, the objective lens including at least an objective-lens housing and an exit lens, and wherein the dispenser attachment including at least a dispenser housing which is designed to be placed onto the objective lens such that a fluid space is formed between the objective-lens housing and dispenser housing and that an output gap is formed between the dispenser housing and the exit lens, and a fluid access into the fluid space, wherein said Use of the dispenser attachment comprising:

providing a lithographic fluid which is coordinated with the laser beam source such that the solidification takes place only in the focus region and by utilizing a multi-photon process;

supplying the lithographic fluid into the fluid space through the fluid access;

applying a volume of lithographic fluid through the output gap; and

introducing the writing beam into the volume of lithographic fluid through the objective lens and causing local solidification of the lithographic fluid in the focus region by means of a multi-photon process for writing the three-dimensional structure.

17 . The Use according to claim 16 , wherein

the applying step is carried out such that the lithographic fluid remains in contact with the exit lens and the writing beam is introduced into the lithographic fluid while the lithographic fluid is in contact with the exit lens.

18 . The Use according to claim 16 , wherein

the applying step is carried out such that the lithographic fluid remains in contact both with the substrate and with the exit lens.

19 . The Use according to claim 16 , wherein

a first lithographic fluid is provided, is supplied into the fluid space through the fluid access and a first volume of the first lithographic fluid is applied through the output gap, and

after that a second lithographic fluid is provided, is supplied into the fluid space through the fluid access and a second volume of the second lithographic fluid is applied through the output gap.

20 . The Use according to claim 19 , wherein

the first lithographic fluid and the second lithographic fluid are different materials having different material properties.

21 . The Use according to claim 19 , wherein

after applying the first lithographic fluid and before applying the second lithographic fluid, at least one step of introducing the writing beam into the volume of first lithographic fluid and locally solidifying the first lithographic fluid is carried out.

22 . The Use according to claim 19 , wherein

the first lithographic fluid is first applied and then the second lithographic fluid is applied, and then the first lithographic fluid and the second lithographic fluid are mixed.

23 . The Use according to claim 16 , wherein

after the step of introducing the writing beam and locally solidifying the lithographic fluid, the following steps are carried out:

providing a developer fluid for exposing and/or curing the written three-dimensional structure;

supplying the developer fluid into the fluid space through the fluid access; and

applying a volume of developer fluid through the output gap.

24 . The Use according to claim 16 , comprising at least the following additional step:

providing and supplying pressurized gas into the fluid space through the fluid access or through an additional access to the fluid space.

25 . The Use according to claim 16 , comprising at least the following additional step:

providing cleaning fluid designed to dissolve non-solidified and solidified lithographic fluid;

supplying the cleaning fluid into the fluid space through the fluid access or through an additional access to the fluid space; and

ejecting cleaning fluid through the output gap.

26 . The Use according to claim 16 , comprising at least the following additional step:

introducing light into the fluid space.

27 . The Use according to claim 16 , wherein

an immersion lens is used as the objective lens.

28 . The Dispenser attachment adapted for mounting on an objective lens, which comprises an objective-lens housing and an exit lens designed for the use according to claim 16 , the dispenser attachment comprising at least the following:

a dispenser housing which is designed to be placed onto the objective lens such that a fluid space is formed between the objective-lens housing and dispenser housing and that an output gap is formed between the dispenser housing and the exit lens, and

a fluid access into the fluid space, wherein

the dispenser housing is designed such that the output gap is an annular gap around the exit lens, the annular gap being delimited by a peripheral edge of the dispenser housing such that the exit lens projects beyond the dispenser housing.

29 . The Dispenser attachment adapted for mounting on an objective lens, which comprises an objective-lens housing and an exit lens designed for the use according to claim 16 , the dispenser attachment comprising at least the following:

a dispenser housing which is designed to be placed onto the objective lens such that a fluid space is formed between the objective-lens housing and dispenser housing and that an output gap is formed between the dispenser housing and the exit lens of the objective lens,

a fluid access into the fluid space, wherein

the dispenser housing has an inner wall and an outer wall surrounding the inner wall, such that the inner wall faces the objective-lens housing, and in that the fluid space is formed between the inner wall and the outer wall, and in that the inner wall has a transmission window that is made of a fluid-tight and optically transparent material and faces the exit lens, the output gap being formed between the transmission window and the outer wall.

30 . The Dispenser attachment adapted for mounting on an objective lens, which comprises an objective-lens housing and an exit lens designed for the use according to claim 16 , the dispenser attachment comprising at least the following:

a dispenser housing which is designed to be placed onto the objective lens such that a fluid space is formed between the objective-lens housing and dispenser housing and that an output gap is formed between the dispenser housing and the exit lens of the objective lens,

a fluid access into the fluid space, wherein

the dispenser housing comprises at least one additional access into the fluid space, the additional access being designed for supplying fluids or light into the fluid space.

31 . The Use according to claim 16 , comprising at least the following additional step:

introducing light into the fluid space, by means of an optical waveguide, which opens into the fluid space.

32 . A Process for and/or Method of Using a dispenser attachment for microscope objective lenses, in a device for writing three-dimensional structures by means of laser lithography in a lithographic fluid, which can be solidified by irradiation with laser light, the device including at least the following:

a laser beam source for emitting a writing beam, a substrate for receiving lithographic fluid, an objective lens for forming a focus region of the writing beam in the lithographic fluid, the objective lens including at least an objective-lens housing and an exit lens, and wherein the dispenser attachment including at least a dispenser housing which is designed to be placed onto the objective lens such that a fluid space is formed between the objective-lens housing and dispenser housing and that an output gap is formed between the dispenser housing and the exit lens, and a fluid access into the fluid space, wherein said Process for and/or Method of Using the dispenser attachment comprising:

providing a lithographic fluid which is coordinated with the laser beam source such that the solidification takes place only in the focus region and by utilizing a multi-photon process;

supplying the lithographic fluid into the fluid space through the fluid access;

applying a volume of lithographic fluid through the output gap; and

introducing the writing beam into the volume of lithographic fluid through the objective lens and causing local solidification of the lithographic fluid in the focus region by means of a multi-photon process for writing the three-dimensional structure.