Total internal reflection holography method and apparatus for li

Details Total internal reflection holography method and apparatus for li Total internal reflection holography method and apparatus for li

1998-06-15

1999-09-07

Spyrou, Cassandra

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 28, G03H 102

Patent

active

059495570

ABSTRACT:
A photolithograhic method and apparatus for exposure of a spherical shaped semiconductor substrate according to a mask pattern of a primary spherical object mask in the manufacture of a spherical semiconductor device is disclosed. A secondary mask is provided, the secondary mask having stored therein a hologram recorded from the primary spherical object mask and containing spherical mask pattern information. The spherical shaped semiconductor substrate is then positioned with respect to the secondary mask in preparation for a photolithographic exposure. Lastly, a reference beam is directed upon the secondary mask for enabling inverse scattering of the hologram to produce an inverse scattered holographic image photolithographic exposure of the spherical shaped semiconductor substrate.

REFERENCES:
patent: 4339168 (1982-07-01), Haines
patent: 4966428 (1990-10-01), Phillips
patent: 5640257 (1997-06-01), Clube

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