Patent ID: 6232167
Filing Date: 2001-05-15
Classification: H01L

Abstract:
A method of producing a ferroelectric thin film coated substrate which includes a substrate, a crystalline thin film formed on the substrate at a first substrate temperature at which crystal grows, and a ferroelectric thin film formed on the crystalline thin film at a second substrate temperature, said method comprising the steps of:a first step of forming a crystalline thin film on a substrate at a first substrate temperature at which crystals grow; anda second step of forming a ferroelectric thin film on said crystalline thin film at a second substrate temperature which is lower than the first substrate temperature,wherein, in order to encourage growth of crystals of the ferroelectric thin film and ensure a sufficiently small particle diameter of crystal grains composing the ferroelectric thin film, a particle diameter of crystal grains composing the crystalline thin film is smaller than a particle diameter of crystal grains composing the ferroelectric thin film.