Processes and apparatuses for producing porous materials

Details Processes and apparatuses for producing porous materials Processes and apparatuses for producing porous materials

2007-06-18

2010-11-16

Culbert, Roberts (Department: 1716)

Etching a substrate: processes

Etching to produce porous or perforated article

C216S090000, C216S091000, C438S753000

Reexamination Certificate

active

07833428

ABSTRACT:
Processes and apparatuses for producing a porous material, such as nano-porous silicon (npSi) media suitable for storage and retrieval of elemental hydrogen. Processes of this invention generally entail applying a magnetic field to a substrate that contains charge carriers and is in contact with an etchant, and then etching the substrate with the etchant while relative movement occurs between the substrate and the magnetic field. During etching, the charge carriers move relative to the substrate and the magnetic field, and porosity forms at surfaces of the substrate contacting the etchant.

REFERENCES:
patent: 08335578 (1996-12-01), None

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