摘要:
A reflective EUV mask and a method of manufacturing the same, the reflective EUV mask including a mask substrate having an exposing region and a peripheral region, the mask substrate including a light scattering crystalline portion that scatters light incident to the peripheral region and that decreases reflectivity of the peripheral region; a reflective layer on an upper surface of the mask substrate, the reflective layer having a first opening that exposes the crystalline portion; and an absorbing layer pattern on an upper surface of the reflective layer, the absorbing layer pattern having a second opening in fluidic communication with the first opening.
摘要:
A method for inspecting a uniformity of CD (CD) of a photo mask pattern increases a production yield. The method obtains a CD by precisely measuring a photo mask by using, an electron microscope. Then, a measurement image having, a plurality of patterns formed in the photo mask is obtained by photographing the photo mask at a high speed through an optical microscope. A gray level based on the CD is calculated by capturing just a pattern area in the measurement image, and an estimated value and a correlation coefficient is obtained, when an open density of the measurement image is relatively low. Accordingly, a uniformity of CD can be confirmed more clearly in a measurement of high speed for a measurement image having a relatively low open density.
摘要:
A method for inspecting a uniformity of CD (CD) of a photo mask pattern increases a production yield. The method obtains a CD by precisely measuring a photo mask by using, an electron microscope. Then, a measurement image having, a plurality of patterns formed in the photo mask is obtained by photographing the photo mask at a high speed through an optical microscope. A gray level based on the CD is calculated by capturing just a pattern area in the measurement image, and an estimated value and a correlation coefficient is obtained, when an open density of the measurement image is relatively low. Accordingly, a uniformity of CD can be confirmed more clearly in a measurement of high speed for a measurement image having a relatively low open density.
摘要:
A method of manufacturing a photomask includes: providing a photomask; exposing the photomask to obtain an aerial image of the photomask and evaluating the photomask using the aerial image; and altering an optical parameter of the photomask associated with the aerial image according to the result of evaluation.
摘要:
A photomask or equivalent optical component includes a scattering element in the medium of a substrate, which actively modifies (adjusts/filters the intensity, shape, and/or components of) light that propagates through the substrate. The substrate has a front surface and a back surface and is transparent to exposure light of a photolithography process, i.e., light of given wavelength, at least one mask pattern at the front surface of the substrate and the image of which is to be transferred to an electronic device substrate in a photolithographic process using the photomask, a blind pattern at the front surface of the substrate and opaque to the exposure light, and the scattering element. The scattering element, in addition to being formed in the medium of the substrate, is situated below the blind pattern as juxtaposed with the blind pattern in the direction of the thickness of the substrate. Also, a section of the photomask substrate is irradiated with energy which does not melt and/or vaporize the medium of the photomask substrate to form the scattering element. To this end, a femtosecond laser may be used.
摘要:
A method of manufacturing a photomask includes: providing a photomask; exposing the photomask to obtain an aerial image of the photomask and evaluating the photomask using the aerial image; and altering an optical parameter of the photomask associated with the aerial image according to the result of evaluation.
摘要:
A reflective EUV mask and a method of manufacturing the same, the reflective EUV mask including a mask substrate having an exposing region and a peripheral region, the mask substrate including a light scattering crystalline portion that scatters light incident to the peripheral region and that decreases reflectivity of the peripheral region; a reflective layer on an upper surface of the mask substrate, the reflective layer having a first opening that exposes the crystalline portion; and an absorbing layer pattern on an upper surface of the reflective layer, the absorbing layer pattern having a second opening in fluidic communication with the first opening.
摘要:
A photomask or equivalent optical component includes a scattering element in the medium of a substrate, which actively modifies (adjusts/filters the intensity, shape, and/or components of) light that propagates through the substrate. The substrate has a front surface and a back surface and is transparent to exposure light of a photolithography process, i.e., light of given wavelength, at least one mask pattern at the front surface of the substrate and the image of which is to be transferred to an electronic device substrate in a photolithographic process using the photomask, a blind pattern at the front surface of the substrate and opaque to the exposure light, and the scattering element. The scattering element, in addition to being formed in the medium of the substrate, is situated below the blind pattern as juxtaposed with the blind pattern in the direction of the thickness of the substrate. Also, a section of the photomask substrate is irradiated with energy which does not melt and/or vaporize the medium of the photomask substrate to form the scattering element. To this end, a femtosecond laser may be used.