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Method of manufacturing mold for diffraction grating light guide plate and method of manufacturing diffraction grating light guide plate

A diffraction grating and light guide plate technology, which is applied in light guides, household appliances, and other household appliances, can solve the problems of thermal deformation of mask film, damage of mold base, and change of mask film, etc.

Active Publication Date: 2022-05-10
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, different mask etching conditions are used to form diffraction grating patterns different in shape from each other, and for this reason, there is a problem that the mask film needs to be changed every time each diffraction grating pattern is formed
[0006] In addition, there is a problem that if the mask film provided on the mold base is thermally deformed during the mask etching process or a sufficient adhesive force is not applied between the mask film and the mold base, the mold base is damaged

Method used

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  • Method of manufacturing mold for diffraction grating light guide plate and method of manufacturing diffraction grating light guide plate
  • Method of manufacturing mold for diffraction grating light guide plate and method of manufacturing diffraction grating light guide plate
  • Method of manufacturing mold for diffraction grating light guide plate and method of manufacturing diffraction grating light guide plate

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Embodiment approach

[0064] According to an exemplary embodiment of the present invention, the ratio of the flow rate of oxygen to the total flow rate of the gas mixture may be 1% or more and 20% or less. Specifically, the ratio of the flow rate of oxygen to the total flow rate of the gas mixture may be 1% or more and 15% or less, 1% or more and 10% or less, or 1% or more and 5% or smaller. When the ratio of the flow rate of oxygen to the total flow rate of the gas mixture is within the above range, the formation of acicular structures during the process of etching the mold base can be further suppressed, and the size of the formed acicular structures can be significantly reduced.

[0065] According to an exemplary embodiment of the present invention, the second to fourth pattern portions may be formed after the first pattern portion is formed on the mold base, or may be formed after the second to fourth pattern portions are formed on the mold base A first pattern portion is formed.

[0066] Her...

Embodiment approach

[0091] Hereinafter, the Examples will be described in detail to specifically describe the present invention. However, the embodiments according to the present invention can be modified in various forms, and should not be construed as limiting the scope of the present invention to the following embodiments. The examples of this specification are provided to further fully explain the present invention to those skilled in the art.

[0092] Preparation of mask film

Embodiment 1

[0093] Embodiment 1_second mask film

[0094] A polyimide (PI) film having a glass transition temperature of about 280° C., a melting point of about 390° C., and a thickness of about 50 μm was prepared as a base. In addition, a silicon-based adhesive film having a thickness of about 6 μm was prepared as an adhesive layer. Thereafter, a mask film was manufactured by attaching an adhesive film to one surface of the PI film. A sample was manufactured by cutting the manufactured mask film into a width of 2.54 cm and a length of 30 cm, and the sample was attached to one surface of stainless steel 304 . Thereafter, based on the ASTM D3330 evaluation method, the force applied when separating the sample from the stainless steel 304 was measured, and the force was about 60 gf / in.

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Abstract

The present invention relates to a method of manufacturing a mold for a diffraction grating light guide plate by using two kinds of mask films, and to a method of manufacturing a diffraction grating light guide plate, the mold having a first pattern portion to a second pattern provided on one surface thereof Four pattern parts.

Description

technical field [0001] This application claims priority and benefit from Korean Patent Application No. 10-2018-0070583 filed with the Korean Intellectual Property Office on June 20, 2018, the entire contents of which are incorporated herein by reference. [0002] The present invention relates to a method of efficiently manufacturing a mold for a diffraction grating light guide plate and a method of manufacturing a diffraction grating light guide plate. Background technique [0003] Recently, as interest in display units for realizing Augmented Reality (AR), Mixed Reality (MR) and Virtual Reality (VR) increases, research on display units has been actively conducted. A display unit for implementing augmented reality, mixed reality, or virtual reality includes a diffraction grating light guide plate utilizing diffraction based on wave characteristics of light. The diffraction grating light guide plate includes a diffraction grating pattern that can internally reflect or totall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/38B29D11/00F21V8/00H01L21/3065
CPCB29D11/00H01L21/3065B29C33/3857B29C2033/3871B29D11/00663G02B6/0036G02B6/0065H01J37/32422H01J37/32651
Inventor 许殷奎章盛皓金忠完辛富建朴正岵尹晶焕秋素英
Owner LG CHEM LTD