Thin Plate Glass Laminate Using Silicone Resin Release Layer
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Solution Overview
Problem
Existing methods for producing thin plate glass substrates for display devices face challenges such as bubble inclusion, convex defects, and difficulty in separating the thin plate glass substrate from the support glass substrate, while also requiring heat resistance and removability.
Innovation Solution
A thin plate glass laminate is formed using a silicone resin layer with releasability and non-adhesive properties, made from a crosslinked product of linear polyorganosiloxane and methyl hydrogen polysiloxane, which allows for easy separation and heat resistance, reducing bubble inclusion and convex defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a thin plate glass substrate is made thinner to reduce weight and thickness of display devices, then weight and thickness are reduced, but strength decreases and deformation increases
Solution Approach 1:
The patent applies composite materials by bonding a thin plate glass substrate (0.1-0.3mm thick) to a support glass substrate to form a laminate structure. This composite construction provides the necessary strength and rigidity while maintaining the weight reduction benefits of the thin glass substrate. The laminate structure allows the thin glass to function structurally without requiring increased thickness.
2Ease of manufacture
If glass substrates are fixed by electrostatic adsorptivity or vacuum adsorptivity, then bonding is achieved, but bubbles or convex defects due to foreign matters are included
Solution Approach 1:
The patent introduces an intermediary substance (adhesive or release paper) between the glass substrates to facilitate bonding while preventing direct contact that would trap foreign matters. This intermediary layer acts as a mediator that enables the bonding process while simultaneously preventing the inclusion of bubbles and convex defects, thereby maintaining surface smoothness.
3Manufacturing precision
If a removable adhesive or adhesive sheet is disposed over the entire surface to fix glass substrates, then bubble inclusion is avoided, but separation becomes difficult and the thin plate glass substrate may break
Solution Approach 1:
The patent applies parameter changes by using a release paper with controlled adhesion properties that allows easy separation. The release paper is designed with specific surface energy characteristics that provide sufficient bonding strength during manufacturing but enable clean separation afterward. This parameter optimization resolves the contradiction between maintaining surface smoothness and enabling easy separation without breakage.
4Strength
If adhesive is used to bond glass substrates, then bonding strength is achieved, but heat resistance becomes problematic due to high temperature treatment requirements
Solution Approach 1:
The patent employs a disposable release paper that can withstand the necessary bonding conditions but is designed to be separated afterward. The release paper serves its bonding function during manufacturing and high temperature treatment, then is removed as a single-use component. This approach allows the use of adhesive bonding for strength while the release paper manages the heat resistance requirement by being replaceable rather than requiring long-term heat resistance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The laminate effectively prevents bubble inclusion and convex defects, enables easy separation of the thin plate glass substrate without breakage, and maintains heat resistance, improving the yield and quality of display devices.
Implementation Method 1
a silicone resin layer having releasability and non-adhesive properties
Implementation Method 2
maintains heat resistance
Implementation Method 3
effectively prevents bubble inclusion and convex defects
Data Source
AI summary
Provided a thin plate glass laminate of a thin plate glass substrate and a support glass substrate, which suppresses inclusion of bubbles and occurrence of convex defects due to foreign matters, from which the thin plate glass substrate and the support glass substrate are easily separated, and which is excellent in heat resistance. A process for producing a display device using the thin plate glass laminate, and a silicone for release paper for the thin plate glass laminate are also provided. A thin plate glass laminate is formed by laminating a thin plate glass substrate and a support glass substrate using a silicone resin layer having releasability and non-adhesive properties.