Joachim Stohr from Menlo Park, CA

Resumes

Joachim Stohr

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Publications

Us Patents

Method For Forming A Multi-Domain Alignment Layer For A Liquid Crystal Display Device

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US Patent:

63138964, Nov 6, 2001

Filed:

Aug 31, 1999

Appl. No.:

9/387215

Inventors:

Mahesh Govind Samant - San Jose CA
Joachim Stohr - Woodside CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G02F 11337

US Classification:

349124

Abstract:

A method for producing a multi-domain alignment layer, as well as multi-domain alignment layers produced thereby and liquid crystal displays comprising the same, are provided. In the subject method, an alignment layer is produced on an alignment surface by directing an ion beam or ion beams at the surface at an angle not equal to 90. degree. , so that the ions contact the surface at non-normal incidence. The substrate may be rotated or the ion beam(s) re-directed or the ion beam source moved so that the surface may be bombarded from different directions in different regions resulting in multiple alignment layer domains with differing alignment. In an alternative embodiment, two ion beams with different angles of incidence may be directed at the surface simultaneously or sequentially, thereby creating multiple alignment layer domains without need for rotation of the substrate. The resultant multi-domain alignment layers find use in liquid crystal display devices.

Method Of Producing A Multi-Domain Alignment Layer By Bombarding Ions Of Normal Incidence

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US Patent:

60611154, May 9, 2000

Filed:

Nov 3, 1998

Appl. No.:

9/185234

Inventors:

Mahesh Govind Samant - San Jose CA
Joachim Stohr - Woodside CA

Assignee:

International Business Machines Incorporation - Armonk NY

International Classification:

G02F 11337
C07C 100

US Classification:

349129

Abstract:

Methods for producing a multi-domain alignment layer, as well as the multi-domain alignment layers produced thereby and liquid crystal displays comprising the same, are provided. In the subject methods, a surface of an alignment film, usually present on a substrate such a planar component of a polarized material, is bombarded with ions initially at normal incidence in the presence of an electric field in a manner sufficient such that the ions contact the surface of the alignment film at non-normal incidence. In a preferred embodiment, the electric field is produced by an array of conducting means associated with the surface of the alignment film, at least two of which means are differentially biased, e. g. alternately biased. The resultant alignment layers find use in liquid crystal display devices.