Patent ID: 11967439
Assignee: MOXTEK, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 11:
12. The method of claim 1, wherein:
forming the upper-boron-film and the lower-boron-film is plasma enhanced and the oven has a temperature of between 100° C. and 340° C. during formation of the upper-boron-film and the lower-boron-film; and
etching through the center of the lower-boron-film and etching through the center of the wafer includes using potassium hydroxide, tetramethylammonium hydroxide, cesium hydroxide, ammonium hydroxide, potassium ferricyanide, sodium hydroxide, sodium oxalate, or combinations thereof.