Process and apparatus for making a metal structured foil
US4968388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1989 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Sep 26, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The continuous process for making a metal structured foil, especially a flat conductor line, a flexible circuit board and a heating foil, by chemically and electrochemically metallizing a nonconductor foil, comprises the steps of: PA0 a. chemically metallizing both sides of the nonconductor foil to form a metal layer on both sides, PA0 b. coating an activated surface which is not to be metallized, PA0 c. electrolytically removing the metal layer on edge regions of the rear side of the foil and from a plurality of surfaces not to be reinforced electrochemically on the front side(operating side) or on both sides, and PA0 d. cathodically polarizing the front side(operating side) of the foil by a current-carrying roller and simultaneously performing an electrochemical bath metallization, whereby chemical dissolution of the metal layers on the rear side and electrochemical reinforcement of the chemically metallized surfaces on a free portion of the front side(operating side) or both sides occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.