Photosensitive polyimide adhesive sheet
Positive tone Photosensitive Polyimide B-stage sheet which was composed of transparent soluble polyimide, naphthoquinone diazide compound, thermal cross linker and solvent, was developed. We designed new polyimide structure and cross linker suitable for photosensitive polyimide sheet. The photosensitive sheet shows fine pattern formation capability as well as good thermal stability and mechanical properties. It is quite easy to obtain flat surface on topological surface to laminate the photosensitive sheet.
Fine Resolution Photosensitive Polyimide Dry Film with High Resistance to Electromigration under HAST condition
Abstract We investigated the effects of photosensitive system (positive and negative) and polymer structures on Cu migration under bias HAST test. The HAST condition is 130C for 85% RH. Bias condition is 2MV/m. We found that there is polyimide structure shows big effect is big effect of no big difference between negative photosensitivity and positive photosensitivity in photo sensensitive polyimides. Polyimide structure effects significant difference on Cu migration under bias HAST condition. Cu migration of soft polyimide seems better than that of rigid polyimide. From these results, we developed good reliable photosensitive polyimide B-sheet having fine pattern capability successfully.
Fragment Rotational State Distributions From The Dissociation Of NeIBr: Experimental And Theoretical Results
The IBr fragment rotational state distributions that result when the NeIBr van der Waals molecule undergoes vibrational predissociation have been measured in a pump–probe laser‐induced fluorescence experiment. Independent of initial vibrational state and the number of quanta of vibrational energy lost from the I–Br coordinate, the rotational distributions extend over the full range of energetically accessible states. From the observation of energetic constraints on the rotational distribution, the dissociation energy (D0) is calculated to be 65.5±1.2 cm−1 for the A electronic state, v=16. For the X electronic state, v=0, D0=71.8±1.2 cm−1. Quantum mechanical bound state calculations carried out on a model A electronic state potential energy surface are in quantitative agreement with this result. The rotational distributions are broader than that predicted by either a Franck–Condon or classical impulsive model for the dissociation. The distributions are qualitatively in accord with classical trajectory calc...