Photomask (CCD,DRAM,LCD,MEMS,etc.) irregularity speckle detection inspection SD2000Mk2(Patent:2124747)
Product outline:

The irregularity of the mask can be detected by

nanometer order.

The resolution limit of the optical system by visible

light is decided by numerical aperture NA of the

optical system and the wavelength ă.

In the high resolution microscope that uses NA=0.9

(maximum level of NA) and the wavelength of

purple illuminate 436 nm,

R (resolution)= 0.61ƒÉ / NA = 0.3ƒÊm.

SD2000Mk2 enables the mask irregularity detection

of 10 nm with the optical system for magnification

2 and NA0.035 by the company own super

resolution technology.

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