Patent · US Expired

Method for producing a self-supporting metal film

US6632341B1 · kind B1 · utility

0Cited by

9References

2Claims

0Family size

Assignee

Bolta-Werke GmbH · DE

Inventors

Axel Schafer · Bad Soden, DE
Oswald Beetz · Wendelstein, DE
Jürgen Hacke&racute;t · Winnweiler, DE

Key dates

Filing date	Feb 27, 2002
Grant date	Oct 14, 2003
Priority date	—
Expiry date	Feb 27, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH05K2203/0723
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Described is a process for producing a self-supporting metal foil (40), in particular copper foil, which by virtue of its constitution has a low shearing strength and which can be structured in a sharp-edged configuration. In this case a base layer of the metal foil (40) is galvanically deposited on a roller cathode (22). A cauliflower structure (60) comprising the metal is deposited in firmly adhering relationship on the metal base layer (58) by means of an additional anode (32) provided between the roller cathode (22) and the anode cage (24). The metal foil (40) comprising the metal base layer (58) and the cauliflower structure (60) is detached from the roller cathode (22), rinsed and dried. The dried foil (40) comprising the metal base layer (58) provided with the cauliflower structure (60) is moved through a black oxide bath (46). There then follows a rinsing operation and a drying operation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.