Photoelectric encoder and method of manufacturing scales

Details Photoelectric encoder and method of manufacturing scales Photoelectric encoder and method of manufacturing scales

2006-10-31

2006-10-31

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231130

Reexamination Certificate

active

07129475

ABSTRACT:
A first metal layer of tungsten is formed on a substrate in a scale. A second metal layer of chromium is formed on the first metal layer. The second metal layer is selectively removed with a mask of resist and an etching stopper of the first metal layer to form an optical grating.

REFERENCES:
patent: 4708437 (1987-11-01), Kraus
patent: 5004673 (1991-04-01), Vlannes
patent: 5786931 (1998-07-01), Speckbacher et al.
patent: 6445456 (2002-09-01), Speckbacher et al.
patent: 2003/0179453 (2003-09-01), Mori et al.
patent: 2004/0008416 (2004-01-01), Okuno
patent: 2004/0046113 (2004-03-01), Mayer et al.
patent: 2005/0052743 (2005-03-01), Speckbacher et al.
patent: 2244002 (1990-09-01), None
patent: A 04-151220 (1992-05-01), None
patent: A 07-113905 (1995-05-01), None

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