Patent ID: 6362098
Filing Date: 2002-03-26
Classification: C23C,H01L

Abstract:
A chemical vapor deposition (CVD) method to fill a trench at a surface of a semiconductor substrate, with the steps of generating a plasma with a plasma generator, applying said plasma above the surface of said semiconductor substrate, and filling said trench by dielectric material that originates from ions in said plasma, said method further characterized by forcing said ions to move towards said substrate in a direction that is substantially perpendicular to the surface of said semiconductor substrate by coupling a first voltage terminal to the semiconductor substrate and coupling a second voltage terminal to the plasma generator and applying a voltage having only a single polarity, the voltage being applied during a first interval and substantially not applying the voltage during a second interval wherein the first interval and the second interval are repeated periodically, the trench being filled during both the first interval and the second interval.