Photochemically etched plates for synthetic fiber-forming spin p

Details Photochemically etched plates for synthetic fiber-forming spin p Photochemically etched plates for synthetic fiber-forming spin p

1997-03-25

1999-07-13

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having aperture or cut

428683, 428685, 428686, 4251315, 425190, 425463, B29C 4700, B32B 702, B32B 324, B32B 1518

Patent

active

059224770

ABSTRACT:
Relatively thin (e.g., thickness of less than about 2.5 mm, and typically no greater than about 1.0 mm) plates for synthetic fiber-forming spin packs include a first metal layer exhibiting a relatively slow photochemical etching property and a second metal layer exhibiting a relatively fast photochemical etching property which are adhered (laminated) to one another to form a composite substrate structure. The differential etch rates as between the first and second metal layers permit relatively dimensionally larger distribution channels and relatively dimensionally precise through holes to be formed in the composite substrate. In this regard, the second metal layer permits the formation via photochemical etching of dimensionally deeper and/or wider polymer distribution channels. The first metal layer, on the other hand, allows for the formation of relatively dimensionally precise through holes via concurrent (simultaneous) etching with the second metal layer.

REFERENCES:
patent: 5017116 (1991-05-01), Carter et al.
patent: 5162074 (1992-11-01), Hills
patent: 5227109 (1993-07-01), Allen, III et al.
patent: 5344297 (1994-09-01), Hills

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