Appeal No. 1999-2576 Application 08/836,960 preventing direct contact between the PSG film 103 and the polysilicon layers 108a and 108b: Figures 2(a)-(c) show the steps involved in forming this silicon nitride layer.: - 9 -Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 NextLast modified: November 3, 2007