Patent ID: 8999058
Filing Date: 2015-04-07
Classification: C25D,C25F,H01L,Y02E

Abstract:
1. An apparatus for producing a layer of porous semiconductor on a plurality of semiconductor wafers, comprising: a first electrode and a second electrode for producing an electrical current, wherein said first electrode and said second electrode are operable to alternate or modulate current and voltage polarity at least one cycle after a predetermined period of time; a plurality of semiconductor wafers in a stacked arrangement, wherein each said semiconductor wafer is held in place by a perimeter wafer seal disposed around a perimeter of said semiconductor wafer, and wherein said stacked arrangement may be at any angle relative to vertical; an electrolyte supply for providing an electrolyte to said apparatus; and a plurality of electrolyte channels or electrolyte compartments disposed between each of said plurality of semiconductor wafers for providing said electrolyte to at least a surface of each said semiconductor wafer and for removing a gas from said surface.