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Cleaning the Reaction Tube Prior to Open Tube Diffusions Disclosure Number: IPCOM000060143D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08

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Malin, K Schellinger, T Schmitt, A [+details]


During the scavenging and heating-up cycle prior to open tube diffusion for doping semiconductor substrates, the conventionally used carrier gas is mixed with chlorine containing substances, such as HCl, Cl2, CCl4, CHCl3 or C2H3Cl3 . These substances form volatile compounds with dopant-containing residues precipitated during the preceding diffusion step on the wall of the reaction tube.