LCD Substrate Bonding Apparatus with Segmented Venting
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Solution Overview
Problem
Conventional substrate bonding apparatuses for LCD panels experience non-uniform venting, leading to poor bonding quality due to gaps and air bubbles between substrates, which affects the overall image quality and reliability of the displays.
Innovation Solution
A substrate bonding apparatus with an upper chucking plate featuring a plurality of blocks, each containing a main venting hole and sub-venting holes, which enhances the uniformity of the venting process by allowing controlled gas injection through main and sub-venting lines, ensuring precise alignment and contact between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single venting hole is used in the upper chucking plate, then the structure is simple, but the venting uniformity is poor causing gaps and air bubbles between substrates
Solution Approach 1:
The single venting hole is divided into multiple sub-venting holes arranged in a matrix pattern. This segmentation allows gas to be introduced at multiple locations simultaneously, creating more uniform venting across the substrate surface and preventing localized gaps and air bubbles during bonding.
Solution Approach 2:
Different regions of the upper chucking plate are provided with sub-venting holes at optimized locations. The local distribution of venting holes is designed to match the specific venting requirements of different areas, ensuring uniform gas distribution and preventing localized bonding defects.
2Reliability
If the upper substrate is released without controlled venting, then the process is fast, but poor bonding quality occurs due to non-uniform venting
Solution Approach 1:
Gas is introduced into the upper chucking plate through the network of sub-venting holes before the upper substrate is fully released. This preliminary venting action ensures that uniform pressure is established across the bonding interface, preventing air bubbles and gaps from forming during the critical bonding moment.
Solution Approach 2:
A gas distribution system is implemented using the sub-venting hole network to deliver pressurized gas uniformly across the venting surface. This pneumatic system enables controlled and simultaneous venting at multiple locations, ensuring reliable bonding quality while maintaining efficient processing speed.
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 apparatus achieves improved bonding uniformity, preventing air bubbles and enhancing the quality of substrate bonding, while also reducing processing time and improving productivity by ensuring uniform venting and precise substrate alignment.
Implementation Method 1
allowing controlled gas injection through main and sub-venting lines
Data Source
AI summary
A substrate bonding apparatus for a liquid crystal display (LCD) panel is disclosed that subdivides its venting holes, thereby achieving an enhancement in uniformity of venting. The substrate bonding apparatus that bonds a first substrate and a second substrate using a venting process, includes a lower chucking plate which chucks the second substrate, and an upper chucking plate which includes a plurality of blocks each including a main venting hole, wherein the upper chucking plate chucks the first substrate in accordance with a chucking operation of the blocks, and subsequently releases the chucked first substrate such that the first substrate falls down toward the second substrate.