Invention Grant
- Patent Title: Method for forming an alignment layer of a liquid crystal display device and display device manufactured thereby
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Application No.: US14995548Application Date: 2016-01-14
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Publication No.: US09921442B2Publication Date: 2018-03-20
- Inventor: Yin Qian , Dyson Hsin-Chih Tai , Ming Zhang , Chia-Chun Miao
- Applicant: OmniVision Technologies, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: OmniVision Technologies, Inc.
- Current Assignee: OmniVision Technologies, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Henneman & Associates, PLC
- Agent Larry E. Henneman, Jr.; Gregory P. Gibson
- Main IPC: G02F1/1337
- IPC: G02F1/1337 ; G02F1/136

Abstract:
A novel method of forming an alignment layer of a liquid crystal display device includes the steps of providing a substrate (e.g., a processed silicon wafer, etc.) having an alignment layer material deposited thereon and applying a series of pulses from a pulse laser to anneal portions of the alignment layer material and alter its surface morphology. The method can include the step of depositing the alignment layer material (e.g., a spin-on dielectric including SiO2) over the substrate using a spin-on process prior to laser annealing. Applying the series of laser pulses creates a repetitive pattern of features that facilitate alignment of liquid crystals according to a laser scan trace. Liquid crystal display devices with laser-annealed alignment layer(s) are also disclosed. The alignment layers of the invention are quickly and inexpensively applied and are very robust under prolonged, high-intensity light stress.
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