This thesis was performed to determine if low intensity reciprocity law -failure (RLF) exists in Kodak Micro Positive Resist B09 (KMPR 809) . At exposure irradiances at or below .44 mw/sq cm, it was observed that solublization of the photopolymer was incomplete, indicating that low-intensity RLF of the photosolubilization does exist. RLF was indicated by the formation of a "scum" layer over the exposed areas of the resist, the thickness of which increased with decreased irradiance. Mechanisms have been identified which may explain the RLF of the photoreaction. Confirmation of the proposed mechanisms could be the subject of another study. The RLF was expected to lead to proportional changes in the line width of the resist patterns, due to intensity differences in the shadow areas of the mask. Line width was found to be independent of irradiance and time of exposure, and the RLF was within the experimental error.
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Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Middel, Jutta C., "Determination of the existence or non-existence of low-intensity reciprocity law failure in Kodak Micro Positive Resist 809" (1984). Thesis. Rochester Institute of Technology. Accessed from
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