Patent ID: 6341935
Filing Date: 2002-01-29
Classification: H01L,Y10S

Abstract:
A wafer boat for holding wafers during processing in a vertical furnace comprising:a top plate and a bottom plate connected together by four spaced-apart vertically extending support parts, said four spaced-apart support posts are arranged in a circumference and consist of two outer support posts positioned juxtaposed to an inlet of said wafer boat and two inner support posts positioned away from said inlet of said wafer boat, a plurality of cavities horizontally disposed each for receiving a wafer therein, each of said plurality of cavities being formed by a horizontal notch in one of said two inner support posts facing a center of said wafer boat, and a horizontal ridge integrally formed with one of said two outer support posts extending radially inwardly toward a center of said wafer boat and circumferentially outwardly toward said inlet of the wafer boat, and a raised portion extending upwardly from a top surface of each of said horizontal ridges adjacent to said inlet of said wafer boat for preventing a wafer from sliding out of one of said plurality of cavities.