Method to make LCOS oxide alignment layer by offset print

Patent metadata

Field	Value
Publication number	US-10317733-B2
Application number	US-201615334488-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 26, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

An alignment layer for a liquid crystal on silicon (LCOS) display includes a nano-particle layer. In a particular embodiment the nano-particle layer includes a lower nano-layer and an upper nano-layer, each formed onto oxide layers of the LCOS display. In a more particular embodiment, the lower nano-layer and the upper nano-layer are offset printed onto the oxide layers.

First claim

We claim:

1. A method of manufacturing a liquid crystal display, said method comprising:
providing a substrate of said liquid crystal display;
applying a liquid crystal alignment pattern to said substrate using a lithography process; and
assembling said substrate into said liquid crystal display with said liquid crystal alignment pattern of said substrate adjacent a liquid crystal layer of said liquid crystal display; and wherein
said liquid crystal alignment pattern is formed from Germanium-containing nano-particles;
said liquid crystal display is a liquid crystal on silicon (LCOS) device;
said substrate is a reflective backplane of said LCOS device; and
said lithography process is a nano offset printing including
providing a template;
patterning a nano-pattern onto said template, said nano-pattern including a plurality of parallel lines having a pitch no greater than 20 nm;
adhering said nano-particles onto said nano-pattern on said template; and
transferring said nano-particles to said substrate to form said liquid crystal alignment pattern on said substrate, said liquid crystal alignment pattern corresponding to said nano-pattern.

2. The method of claim 1 , further comprising:
providing a second substrate of said liquid crystal display;
applying a liquid crystal alignment pattern to said second substrate using a lithography process; and
assembling said second substrate into said liquid crystal display with said liquid crystal alignment pattern of said second substrate adjacent said liquid crystal layer of said liquid crystal display.

3. The method of claim 2 , wherein:
said second substrate is a transparent electrode of said liquid crystal display.

4. The method of claim 1 , wherein said nano-particles are made from materials having a dielectric constant greater than the dielectric constant of polyimide.

5. The method of claim 1 , wherein said nano-particles are made from materials having a dielectric constant greater than or equal to 7.

6. The method of claim 1 , wherein said liquid crystal alignment pattern is formed from nano-particles including at least one of Germanium, Germanium Oxide and Silicon-Germanium alloy.

7. The method of claim 1 , wherein said liquid crystal alignment pattern is formed from nano-particles including at least one of Silicon-Carbon alloy and Germanium-Carbon alloy.

Assignees

• Omnivision Tech Inc

Inventors

• Zhang Ming
• Qian Yin
• Weng Libo
• Cellek Oray Orkun
• Tai Dyson Hsin-Chih
• Liu Lequn
• Massetti Dominic

Classifications

• G02F1/1303

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• G02F2202/105

  single crystal Si · CPC title

• G02F1/1337 Primary

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title