Patent ID: 6737355
Filing Date: 2004-05-18
Classification: H01L

Abstract:
A method of forming a silicon oxide layer having a thickness ranging from about 3 &mgr;m to about 200 &mgr;m in a silicon containing structure, said method comprising:a) etching a silicon layer to produce a plurality of adjacent trenches separated by a plurality of trench walls, said etched silicon layer including trenches having a nominal trench opening width and a nominal trench height, and trench walls of nominal wall thickness, where said nominal trench opening width is about 2 times said nominal trench wall thickness within said silicon layer; and b) thermally oxidizing said plurality of trench walls within said silicon layer, whereby a thermally oxidized silicon oxide layer having a thickness approximately equal to said trench height and a width or length which is greater than the sum of said trench opening widths is produced.