Production of two superposed elements within an integrated electronic circuit
A first circuit element, which is reflective, is formed. A first layer, which is attenuating, is formed. above the first circuit element. A second layer, which is transparent, is formed above the first layer to fill an aperture in the first layer. An overlying lithography resist layer is then expose...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
15.06.2010
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Subjects | |
Online Access | Get full text |
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Summary: | A first circuit element, which is reflective, is formed. A first layer, which is attenuating, is formed. above the first circuit element. A second layer, which is transparent, is formed above the first layer to fill an aperture in the first layer. An overlying lithography resist layer is then exposed to a radiation flux level below a development threshold but high enough that a sum of the radiation flux level and a reflected secondary radiation flux level exceeds the development threshold. The lithography resist layer is developed so as to obtain a mask having an opening through which the first and second layers are removed to form a second aperture which is filled to form a second circuit element. |
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Bibliography: | Application Number: US20060442703 |