Method of forming apertures into thin metallic foils

Details Method of forming apertures into thin metallic foils Method of forming apertures into thin metallic foils

1992-03-02

1994-10-04

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430396, 430323, 430327, 1566591, 1566611, 156664, 205 75, C23F 100

Patent

active

053525655

ABSTRACT:
A device for shielding composite material surfaces of aircraft from the destructive forces associated with lightning strikes and for protecting avionics from electromagnetic interference (EMI) and radio frequency interference (RFI), is provided, consisting of a thin metallic foil having uniformly spaced polygonal apertures formed therein. The polygonal apertures are so shaped as to provide at least one axis along which the shield material can expand or lengthen, permitting the shield material to better fit the irregular or compound curved surfaces found on aircraft. The foil shield can also be used to protect the filler material used between joints and to repair breaks and openings formed in the aircraft surface. When fashioned out of aluminum and applied to a composite material, such as graphite epoxy, the shield may be plated with nickel to prevent galvanic corrosion caused by the contact between dissimilar materials. When manufactured from copper the shield provides a solderable surface. A method for manufacturing such a shield is also provided where photolithographic techniques are used to mask, expose, and etch apertures into metallic sheets.

REFERENCES:
patent: 3329541 (1967-07-01), Mears
patent: 4282311 (1981-08-01), DiNardo, Jr.
patent: 4362595 (1982-12-01), Skog
patent: 4755257 (1988-07-01), Yamamoto et al.
patent: 4755904 (1988-07-01), Brick
patent: 4902607 (1990-02-01), Lee

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