Broken wafer in Ch.B. Also heavy resist build-up in the chamber. Wet cleaned the chamber and adjusted the wafer hand-off position. Still having a problem with the current reading on one of the magnet's 3 power supply line. One of the current reading drops to "0" when the RF turns on. Continuing to troubleshoot.
Ch.A - ordered two new chamber interconnect cables to replace the ones that has signs of corrosion.
Ch.C- ran OK. cycled 10 wafers with no problems. Will continue to exercise the chamber tomorrow.
Located at least one source of the water leak. Will attempt to repair tomorrow.
Wednesday, April 30, 2008
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