Patent ID: 6647579
Filing Date: 2003-11-18
Classification: B08B,H01L,Y10S

Abstract:
A semiconductor wafer chemical mechanical processing apparatus comprising:a chuck for holding a semiconductor wafer having a surface to be treated in a in a known position; a head assembly carrying a brush; a motorized mechanism positioning said brush adjacent said wafer surface; a first pressure adjusting device on said head assembly which establishes a first selected pressure between said brush and said wafer surface, and a second pressure adjusting device on said head assembly which can temporarily alter the first selected pressure established between said brush and said wafer surface by said first pressure adjusting device without changing the setting of the said first pressure adjusting device that established the selected first pressure, said second pressure adjusting device being independent of said first pressure adjusting device such that when said second pressure adjusting device is deactivated, the first selected pressure established by said first pressure adjusting device is re-established between said brush and said wafer surface; said head assembly comprising:an extended arm mounted on a post, said extended arm comprising a yoke having bifurcated arms and an elongated bar suspended between said bifurcated arms on a pivot; said elongated bar having a proximal end positioned between said bifurcated arms and a distal end extending beyond said bifurcated arms, wherein said head assembly comprises:an extended arm mounted on a post, said extended arm comprising a yoke having bifurcated arms and an elongated bar suspended between said bifurcated arms on a pivot; said elongated bar having a proximal end positioned between said bifurcated arms and a distal end extending beyond said bifurcated arms.