Abstract:
PURPOSE: A method for modifying a photomask and the photomask which is modified using the same are provided to enable a damaged part to be transparent to pattern transfer wavelengths by making a hardened part have a light transmission rate and a refractive index same as a glass substrate and to prevent diffused reflection on the damaged part. CONSTITUTION: A method for modifying a photomask comprises a step of spreading liquid glass(3) on a damaged part(1a) of the photomask(1) which is manufactured using a glass substrate and a step of hardening the liquid glass. The liquid glass is tetraethyl orthosilicate or a spin on glass material. The liquid glass is hardened using heat or ultraviolet ray(4). The liquid glass is spread on a concave part after forming the concave part by eliminating the damaged part of the photomask.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for correcting defects of a photomask which stably and reliably corrects various types of defects caused by foreign substances, based on materials, shapes, sizes and adhesive degrees. SOLUTION: The defect correction method for a photomask includes removing a foreign matter defect on a photomask by use of a plurality of probes. That is, a foreign substance defect on a photomask is removed and corrected by preparing a plurality of probes, simultaneously bringing at least two probes into contact with a foreign substance on a photomask surface, holding the foreign substance at least at three different positions, and parting the foreign substance away from the photomask surface. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of correcting a photomask, in which diffuse reflection in a flaw portion on the backside can be prevented in an exposure process and even a flaw portion can be changed into transparent to the wavelength in a transfer process. SOLUTION: The method of correcting the photomask includes steps of: applying a liquid glass 3 on a flaw 1a present on the backside of a photomask 1, the liquid glass to become a glass having a light transmittance of ≥70% and a refractive index of at least 1.4 after cured; and curing the liquid glass 3. COPYRIGHT: (C)2010,JPO&INPIT