Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating selected area
Patent
1996-04-12
1998-01-06
Gorgos, Kathryn L.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating selected area
205157, 205224, 205666, 437 15, 437 23, 437170, 437905, H01L 3300, C25D 1102
Patent
active
057050473
ABSTRACT:
A method for manufacturing a porous blue light emitting diode comprising the steps of preparing a silicon substrate having a back surface, applying a conducting layer on the back surface, annealing the substrate coated with the conducting layer in an inert gas atmosphere, applying an anti-corrosion layer on the conducting layer, immersing the anti-corrosion layer-applied substrate in a hydrofluoric acid aqueous solution with a concentration of about 5% by volume, applying a voltage to the resulting layers for eroding the anti-corrosion layer-applied substrate to form a porous layer having Si wires on a top surface of the substrate, and oxidizing the porous layer for making sizes of the Si wires small enough for emitting light having a peak occuring at a wavelength shorter than about 520 nm. This method offers a simple and feasible way to fabricate a porous blue light emitting diode.
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Gorgos Kathryn L.
Leader William T.
National Science Council
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