Rapid thermal process for silicon sheet capable of obtaining denuded zone and product thereof
A technology of rapid heat treatment and process method, applied in the direction of electrical components, semiconductor/solid-state device manufacturing, circuits, etc., can solve the problems that cannot reach 10μm, clean area thickness, etc.
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[0041] In H 2 / NH 3 Under / Ar atmosphere, use different cooling rates to perform RTA treatment on silicon wafers. During the experiment, except for the different holding time, other process conditions are the same. After RTA treatment, the density of COP was measured. A heat treatment process of heat preservation at 700°C for 4 hours and heat preservation at 900°C for 16 hours generates oxygen precipitation and obtains a clean area. The specific process parameters and experimental results are shown in Table 1.
[0042] It can be seen from Table 1 that the thickness of the clean zone becomes thinner as the holding time increases, and the oxygen precipitation density decreases as the holding time increases. The COP density decreases as the holding time increases, but it will not decrease all the time. 30s holding time is enough to eliminate COP, Figure 4 The clean area obtained for 15S insulation, such as Figure 4 As shown, Figure 4 The symbols in are respectivel...
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