5.
    发明专利
    未知

    公开(公告)号:FR2376413A1

    公开(公告)日:1978-07-28

    申请号:FR7735650

    申请日:1977-11-18

    Applicant: IBM

    Abstract: A method is described for the quantitative analysis of a solution in which the solvent produces a nuclear magnetic resonant (NMR) spectral peak that dominates the system. A first spectrum containing the peak is made by operation of a nuclear magnetic resonant spectrometer at a first gain setting. The NMR apparatus is a pulse-modulated, Fourier-transform type spectrometer. A second spectrum is produced in which a 180 DEG pulse is applied to invert the spectral component magnetization followed after a period of time by a 90 DEG pulse. The period of time is sufficient to allow the solvent or component producing the unwanted peak to relax from the inverted state to a point where there is minimum magnetization along the longitudinal axis. At this point, in many solutions the other components have completely relaxed so that the 90 DEG pulse produces a free induction decay signal which, after undergoing the Fourier-transformation, yields a spectrum that does not include any significant peak due to the solvent. Thereafter, the quantitative analysis is performed by measuring the areas under the respective component peaks and simultaneously solving a series of equations in which the weight of the various components is proportional to the respective areas under the peaks and to the gain settings of the spectrometer.

    PROCESS FOR PLANARIZING A SUBSTRATE

    公开(公告)号:CA1223782A

    公开(公告)日:1987-07-07

    申请号:CA508355

    申请日:1986-05-05

    Applicant: IBM

    Abstract: PROCESS FOR PLANARIZING A SUBSTRATE A surface coating of high glass temperature and superior mechanical properties along with excellent planarization and gap filling is used to coat substrates. The coating comprises a polyamide alkyl ester from a pyromellitic alkyl diester and a para-linked aromatic diamine dissolved in a solvent containing at least 10% of a co-solvent boiling above 220.degree.C.

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