Specific Process Knowledge/Thermal Process/C1 Furnace Anneal-oxide

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Anneal-oxide furnace (C1)

C1 Anneal-oxide furnace. Positioned in cleanroom 2

The Anneal-oxide furnace (C1) is a Tempress horizontal furnace for oxidation and annealing of silicon wafers, e.g with layers of oxide, polysilicon or BPSG glass (from PECVD1). Both 100 mm and 150 mm wafers can be processed in the furnace.

The Anneal-oxide furnace is the upper furnace tube in the furnace C-stack positioned in cleanroom 2. In this furnace it is allowed to process wafers that comes directly from PECVD1, all other wafers have to the RCA cleaned. Check the cross contamination chart.

The user manual, technical information and contact information can be found in LabManager:

Anneal-oxide furnace (C1)

Process knowledge

• Oxidation: look at the Oxidation page
• Annealing: look at the Annealing page

Overview of the performance of Anneal Oxide furnace and some process related parameters

Purpose	Oxidation and annealing	Oxidation: Dry Wet: with bubbler (water steam + N2)
Performance	Film thickness	Dry SiO2: 50Å to ~2000Å (takes too long to make it thicker) Wet SiO2: 50Å to ~5µm ((takes too long to make it thicker)
Process parameter range	Process Temperature	800-1150 oC
	Process pressure	1 atm
	Gas flows	Annealing: N2:5 sccm Dry oxidation: O2:5 sccm Wet oxidation: N2:5 sccm
Substrates	Batch size	1-30 4" and 6" wafer (or 2" wafers) per run
	Substrate material allowed	Silicon wafers (new from the box or RCA cleaned) Silicon wafers with layers of silicon oxide or silicon (oxy)nitride (RCA cleaned) Quartz wafers (RCA cleaned) From PECVD1 directly (assuming they fulfilled the above before entering the PECVD1)