摘要:
A support sleeve 100 for supporting a high temperature process tube comprises one or more circumferential channels 120, 126, 124, and 122, each channel connected to either a feed for gas or a vacuum exhaust. One circumferential channel 120 opens to the top surface 108 of the sleeve 100, on which the process tube is supported to provide a gas/vacuum seal between the process tube and support sleeve 100. Another circumferential channel 124 is connected to a gas feed 114 and provided with gas injection holes 134, evenly distributed along the inner surface 106 of the support sleeve 100 to provide a cylindrically symmetrical injection of process gas into the process tube. Another circumferential channel 126 is connected to an exhaust 116 for gas and provided with gas exhaust holes 132, evenly distributed along the circumference of the support sleeve 100, to provide a cylindrically symmetric exhaust of process gases from the process tube.
摘要:
A support sleeve 100 for supporting a high temperature process tube comprises one or more circumferential channels 120, 126, 124, and 122, each channel connected to either a feed for gas or a vacuum exhaust. One circumferential channel 120 opens to the top surface 108 of the sleeve 100, on which the process tube is supported to provide a gas/vacuum seal between the process tube and support sleeve 100. Another circumferential channel 124 is connected to a gas feed 114 and provided with gas injection holes 134, evenly distributed along the inner surface 106 of the support sleeve 100 to provide a cylindrically symmetrical injection of process gas into the process tube. Another circumferential channel 126 is connected to an exhaust 116 for gas and provided with gas exhaust holes 132, evenly distributed along the circumference of the support sleeve 100, to provide a cylindrically symmetric exhaust of process gases from the process tube.
摘要:
A pedestal (100) for use in a high temperature vertical fumace for the processing of semiconductor wafers provides a closure and heat insulation for the lower end of the furnace and is a wafer boat support. The pedestal (100), comprising quartz-enveloped insulation material (130, 132), supports a wafer boat at a boat support level (113) and is provided with an upper section (102) disposed above the boat support level (113). The upper section (102) comprises enveloped insulating maferial (130). The envelope of the upper section (102) is also formed of quartz and the insulating material (130) in the upper section (102) has a lower thermal conductance than the insulating material (132) in a lower quartz enveloped section (104).
摘要:
A pedestal (100) for use in a high temperature vertical fumace for the processing of semiconductor wafers provides a closure and heat insulation for the lower end of the furnace and is a wafer boat support. The pedestal (100), comprising quartz-enveloped insulation material (130, 132), supports a wafer boat at a boat support level (113) and is provided with an upper section (102) disposed above the boat support level (113). The upper section (102) comprises enveloped insulating maferial (130). The envelope of the upper section (102) is also formed of quartz and the insulating material (130) in the upper section (102) has a lower thermal conductance than the insulating material (132) in a lower quartz enveloped section (104).
摘要:
A method for forming, by means of water vapor, an oxidation layer on a number of wafers manufactured from semiconducting material, wherein a number of wafers are disposed one above the other and introduced into a vertical process chamber in which a substantially atmospheric pressure prevails and in which the wafers are brought to an increased temperature and maintained at that temperature, wherein for forming the water vapor, a first gas, containing hydrogen, is mixed with a second gas, containing oxygen, the concentration of hydrogen in the first gas and/or the concentration of oxygen in the second gas and/or the ratio of the flow rates of the first and the second gas being such that during mixing of the first and the second gas, explosion of the third gas mixture formed therefrom is impossible. The invention also relates to a wafer processing furnace suitable and intended for performing the above-described method.