Abstract

To develop a low‐stress dielectric thin film, a novel liquid‐phase deposition (LPD) technique utilizing silica‐saturated hydrofluosilicic solution with only added is proposed. Due to fluorine incorporation, the stress in as‐deposited LPD oxide can be as low as 83.3 MPa (tensile). Addition of greatly affects the stresses in as‐deposited LPD oxide: the less added, the lower the stress will be. The stress variations accompanying thermal cycling have also been clarified. Films deposited with a larger quantity of added exhibited larger stress variations (hysteresis). After ex situ annealing at around 600°C, the total stress decreased to near 0 MPa.

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