The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2008
Filed:
Aug. 09, 2006
Sangkyun Kang, Seongnam-Si, KR;
Yong-il Park, Kyungbuk, KR;
Friedrich B. Prinz, Woodside, CA (US);
Suk-won Cha, Stanford, CA (US);
Yuji Saito, Tokyo, JP;
Ali Farvid, Palo Alto, CA (US);
Pei-chen Su, Stanford, CA (US);
Sangkyun Kang, Seongnam-Si, KR;
Yong-Il Park, Kyungbuk, KR;
Friedrich B. Prinz, Woodside, CA (US);
Suk-Won Cha, Stanford, CA (US);
Yuji Saito, Tokyo, JP;
Ali Farvid, Palo Alto, CA (US);
Pei-Chen Su, Stanford, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Honda Motor Co., Ltd, Tokyo, JP;
Abstract
An improved two-step replication process for fabrication of porous metallic membranes is provided. A negative of a porous non-metallic template is made by infiltration of a liquid precursor into the template, curing the precursor to form a solid negative, and removing the template to expose the negative. Metal is deposited to surround the exposed negative. Removal of the negative provides a porous metallic membrane having pores which replicate the pores of the original template membrane. The negative is kept immersed in a liquid at all times between removing the template and depositing the metal. This immersion eliminates damage to the negative that would be incurred in drying the negative out between these processing steps. Another aspect of the invention is metallic membranes prepared according to the preceding method. For example, metallic membranes having pores smaller on one side than on the other side of the membrane are provided.