Photolithographic etching process for fabricating wire screen di

Details Photolithographic etching process for fabricating wire screen di Photolithographic etching process for fabricating wire screen di

1992-11-03

1994-02-15

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156630, 156634, 156644, 156656, 156664, B44C 122, C23F 100

Patent

active

052863450

ABSTRACT:
A photolithographic etching process for accurately and uniformly fabricating wire screen disks of varying complex geometries for cryogenic cooler regenerators. The photolithographic etching process includes the steps of applying a photoresist to a sheet of wire screen, developing the photoresist in the form of one or more desired disk shapes, and then etching the developed sheet of wire screen to form the wire screen disks. The etching process of the present invention produces wire screen disks with solid edges, thus ensuring that the wire screen disks fit properly in the regenerator. Also, these edges have no loose or bent wires which can break off and potentially damage the compressor and other moving parts of the cryogenic cooler. The etching process of the present invention can be used to fabricate wire screen disks with varying complex geometries, thus allowing for the construction of cryogenic coolers having complex, but more efficient, configurations.

REFERENCES:
patent: 3352729 (1967-11-01), Kling et al.
patent: 3614822 (1971-10-01), Brown

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