Patent ID: 6261634
Filing Date: 2001-07-17
Classification: C23C

Abstract:
An inductive coupled chemical vapor deposition apparatus for forming a film over a flexible substrate comprising:a deposition chamber;a coil for high frequency excitation;a plasma region being formed by applying an induction energy from the coil;an auxiliary electrode for applying an external bias and introducing material ions into the flexible substrate, said material ions being activated in the plasma region;a cylindrical roller for moving the flexible substrate in a first direction of curvature to provide a radius of curvature, wherein a central axis of the radius of curvature is a second direction which is the same as the first direction, said central axis being defined by connecting a center of the curvature with each other,wherein the first and second directions are different from the first direction of curvature, andwherein the flexible substrate curves in a second direction of curvature after deposition to cancel an internal stress of the film provided by the guide roller to thereby reduce warpage of the film.