Laminate for forming capacitor layer and method for...

Details Laminate for forming capacitor layer and method for... Laminate for forming capacitor layer and method for...

2005-01-04

2005-01-04

Thomas, Eric (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S322000

Reexamination Certificate

active

06839219

ABSTRACT:
An object of the present invention is to provide a laminate for forming a capacitor layer for a printed wiring board which is capable of ensuring a higher capacitance and an inner layer core material using the laminate for example. In order to achieve this object, a material for forming a capacitor layer comprising a three-layered structure of an aluminum layer2/a modified alumina barrier layer3/an electrode copper layer4is used, such as a laminate1afor forming a capacitor layer in which the above described modified alumina barrier layer3is obtained through subjecting one side of an aluminum plate or aluminum foil to an anodic treatment to form an alumina barrier layer as a uniform oxide layer and then subjecting the alumina material with the above described alumina barrier layer formed thereon to a boiling and modifying treatment in water and the above described modified aluminum barrier layer3is used as a dielectric layer.

REFERENCES:
patent: 6433993 (2002-08-01), Hunt et al.
patent: 1100295 (2001-05-01), None
patent: 51-40563 (1976-04-01), None
patent: 55-8054 (1980-01-01), None
patent: 59-171112 (1984-09-01), None
patent: 8-269799 (1996-10-01), None

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