Low temperature load and bake

Details Low temperature load and bake Low temperature load and bake

2006-09-19

2006-09-19

Kunemund, Robert (Department: 1722)

Single-crystal, oriented-crystal, and epitaxy growth processes;

Forming from vapor or gaseous state

With decomposition of a precursor

C117S090000, C117S094000, C117S106000

Reexamination Certificate

active

07108748

ABSTRACT:
Methods are provided for low temperature, rapid baking to remove impurities from a semiconductor surface prior to in-situ deposition. Advantageously, a short, low temperature process consumes very little of the thermal budget, such that the process is suitable for advanced, high density circuits with shallow junctions. Furthermore, throughput is greatly improved by the low temperature bake, particularly in combination with low temperature plasma cleaning and low temperature wafer loading prior to the bake, and deposition after the bake at temperatures lower than conventional epitaxial deposition. The process enables epitaxial deposition of silicon-containing layers over semiconductor surfaces, particularly enabling epitaxial deposition over a silicon germanium base layer. By use of a low-temperature bake, the silicon germanium base layer can be cleaned to facilitate further epitaxial deposition without relaxing the strained crystal structure of the silicon germanium.

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