1 April 1991 Waveguiding characteristics in polyimide films with different chemistry of formation
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Abstract
We have compared the optical loss characteristics of polyimide waveguides derived from three different polyimide samples. We observed significant differences in the waveguiding characteristics (at 0. 8 Rm) of these samples. The photosensitive preimidized samples exhibited the best waveguiding characteristics with losses below the detection limit (0. 5 dB/cm) in some instances. Various processing conditions such as the curing affected all three samples but to a different extent. The photosensitive polyamic acid ester based samples exhibited the maximum sensitivity to the curing temperature and the heating rate. Optical losses in the preimidized photosensitive polyimide films remained low (less than 1. 0 dB/cm) even after a 350 C baking step.
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Kishore K. Chakravorty, Chung-Ping Chien, "Waveguiding characteristics in polyimide films with different chemistry of formation", Proc. SPIE 1389, Microelectronic Interconnects and Packages: Optical and Electrical Technologies, (1 April 1991); doi: 10.1117/12.25556; https://doi.org/10.1117/12.25556
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