Method for Forming a Pellicle

Patent metadata

Field	Value
Publication number	US-2018329291-A1
Application number	US-201815979827-A
Country	US
Kind code	A1
Filing date	May 15, 2018
Priority date	May 15, 2017
Publication date	Nov 15, 2018
Grant date	—

Abstract

The present disclosure relates to a method for forming a pellicle for extreme ultraviolet lithography, the method comprising: forming a coating of a first material on a peripheral region of a main surface of a carbon nanotube pellicle membrane, the membrane including a carbon nanotube film, arranging the carbon nanotube pellicle membrane on a pellicle frame with the peripheral region facing a support surface of the pellicle frame, wherein the support surface of the pellicle frame is formed by a second material, and bonding together the coating of the carbon nanotube pellicle membrane and the pellicle support surface by pressing the carbon nanotube pellicle membrane and the pellicle support surface against each other. The present disclosure relates also relates to a method for forming a reticle system for extreme ultraviolet lithography.

First claim

What is claimed is:

1 . A method for forming a pellicle for extreme ultraviolet lithography, the method comprising:
forming a coating of a first material on at least a peripheral region of a main surface of a carbon nanotube pellicle membrane, the membrane including a carbon nanotube film; arranging the carbon nanotube pellicle membrane on a pellicle frame with the peripheral region of the main surface of the carbon nanotube pellicle membrane facing a support surface of the pellicle frame, wherein the support surface of the pellicle frame is formed by a second material; and bonding together the coating of the carbon nanotube pellicle membrane and the support surface of the pellicle frame by pressing the carbon nanotube pellicle membrane and the support surface of the pellicle frame against each other.

2 . The method according to claim 1 , wherein the step of bonding includes applying a vacuum having a pressure below 1 mbar to the carbon nanotube pellicle membrane and the pellicle frame.

3 . The method according to claim 1 ,
wherein the support surface of the pellicle frame is formed by a first material and the coating is formed by a second material, wherein the first material is a metal or a semiconductor, and wherein the second material is a metal or a semiconductor.

4 . The method according to claim 1 , wherein the first material and the second material are selected from the group consisting of: Zr, Mo Ru, Pd, Nb, Ge, and Si.

5 . The method according to claim 1 , wherein the first material and the second material are the same materials.

6 . The method according to claim 1 , the method further comprising heating the carbon nanotube pellicle membrane and the pellicle frame while applying pressure.

7 . The method according to claim 1 , wherein the step of bonding includes pressing the carbon nanotube pellicle membrane and the support surface of the pellicle frame together by means of a mechanical pressure while applying a vacuum having a pressure below 1 mbar to the carbon nanotube pellicle membrane and the pellicle frame.

8 . The method according to claim 7 , wherein the pressing the carbon nanotube pellicle membrane includes applying a pressure of 0.1 kPa to 30 MPa.

9 . The method according to claim 1 , further comprising increasing a tensile stress in the carbon nanotube pellicle membrane prior to arranging the carbon nanotube pellicle membrane on the pellicle frame.

10 . The method according to claim 1 , the method further comprising stretching the carbon nanotube pellicle membrane in a lateral direction prior to arranging the carbon nanotube pellicle membrane on the pellicle frame.

11 . The method according to claim 1 , wherein the pellicle frame comprises a frame body of a third material which is different from the second material.

12 . The method according to claim 11 , wherein the frame body is permeable to air.

13 . The method according to claim 1 , wherein the pellicle frame is formed by Si, SiN, SiO 2 , or quartz.

14 . The method according to claim 1 , wherein the coating is formed to cover an entire main surface of the carbon nanotube pellicle membrane.

15 . A method for forming a reticle system for extreme ultraviolet lithography, the method comprising:
forming a pellicle according to claim 1 ; and mounting the pellicle on a reticle.

16 . A reticle system for extreme ultraviolet lithography, formed according to the method of claim 15 .

17 . A pellicle for extreme ultraviolet lithography, the pellicle comprising:
a pellicle frame having a support surface; and a carbon nanotube pellicle membrane including at least one carbon nanotube film,
wherein a coating of a first material is provided on at least a peripheral region of a main surface of the carbon nanotube pellicle membrane,
wherein the support surface of the pellicle frame is formed by a second material, and
wherein the peripheral region of the carbon nanotube pellicle membrane is attached to the support surface of the pellicle frame.

18 . The pellicle according to claim 17 , wherein the pellicle frame and the carbon nanotube pellicle membrane are bonded together.

19 . The pellicle according to claim 17 , wherein the first material and the second material are selected from the group consisting of: Zr, Mo Ru, Pd, Nb, Ge, and Si.

20 . The pellicle according to claim 17 , wherein first material and the second material are the same materials.

Assignees

• Imec Vzw
• Imec USA Nanoelectronics Design Center

Inventors

• Timmermans Marina
• Gallagher Emily
• Pollentier Ivan
• Adelmann Hanns Christoph
• Huyghebaert Cedric
• Lee Jae Uk

Classifications

• H10P14/00 Primary

  Formation of materials, e.g. in the shape of layers or pillars · CPC title

• G03F1/64 Primary

  characterised by the frames, e.g. structure or material, including bonding means therefor · CPC title

• G03F1/62 Primary

  Pellicles, e.g. pellicle assemblies, e.g. having membrane on support frame; Preparation thereof · CPC title