Process method for microstructure hot-pressing of flat glass substrate for high-precision display

Abstract

Theinvention relates to a micro-structure hot pressing method for a flat glass substrate for high-precision display. The method comprises the steps of constructing an NCY grid structure model of glassbased on the principle that the basic constructive element of glass is of a symmetrical tetrahedral structure in a balance state; determining that a relation between accelerated high temperature creep rate epsilon of glass and reciprocal of temperature T as well as inner stress sigma is in accordance with a constitutive equation; setting that states of matters are transformed by equal modulus through viscosity, and constructing a viscosity transfer equation; determining a glass grid viscosity index according to the viscosity transfer equation; determining a fixed constant of a modulus factorxi in a constant change process from solid to liquid to solid due to temperature in glass hot pressing and forming process; establishing a model for glass grid feature size; determining a geometric correction factor zeta being equal to 5.49E-03 according to the constitutive equation and the model for glass grid feature size; determining a temperature rising rate and annealing temperature equalization time of the glass in the micro-structure hot pressing method according to the geometric correction factor.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a process method for microstructure hot pressing of flat glass substrates for high-precision display. Background technique [0002] With the rapid development of optoelectronic communication, optics, and display industries, high-performance optical components, including glass substrates with complex microstructures and optical glasses with complex shapes, are widely used. The manufacturing precision requirements for microstructure glass and aspheric optical glass are also getting higher and higher. The traditional design process production method is to use high-precision machine tools for grinding and laser cutting. The disadvantages are long production cycle, high cost, unstable precision and small production scale. Glass compression molding technology uses precision-sized molds to mold high-precision glass with the required shape. This processing method has short production c...

AI Technical Summary

Problems solved by technology

[0004] The existing glass hot pressing technology generally does not involve micron-scale structural precision and optical dispersion and light transmittance caused by residual stress after forming, and is limited to the process based on the image-only theory used in general industry or civilian use. Repeated trial and error to change the mold size and select the mold type and process parameters to achieve the desired end products of glass molding with general precision, such as lenses, vessels, pipes, flat plates, etc., but cannot produce optical-grade micron with complex structures Grade Glass Structural Parts

The main reason for this situation is that there is no effective and complete system based on chemical physics that is suitable for hot pressing of glass. It is derived from the basic Newtonian mechanical or thermal or quantum mechanical characteristic quantities of the microscopic basic structural units of glass. Correspondingly, there is no complete set of hot pressing technology for guiding the hot pressing production of high-precision microstructure glass.

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