Washing Device Floating Unit Prevents Substrate Droop
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Solution Overview
Problem
During the washing process of large substrates for liquid crystal display devices, the transfer rollers droop due to gravity, causing the substrates to droop and potentially leading to damage during plasma irradiation.
Innovation Solution
A washing device with a plasma irradiating part that includes a floating unit to maintain the substrate in a floating state, using a combination of plasma irradiation and air jets to prevent drooping, along with a series of transfer rollers and washing units to ensure effective cleaning and drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transfer rollers are used to transport large substrates, then substrate transport is enabled, but the rollers droop under gravity causing substrate damage
Solution Approach 1:
The patent introduces support rollers positioned beneath the transfer rollers to counteract the gravitational force acting on the transfer rollers and substrates. These support rollers provide upward support force that balances the weight of the transfer rollers, preventing them from drooping and thereby maintaining substrate integrity during transport.
Solution Approach 2:
The support rollers act as an intermediary element between the transfer rollers and the substrate. By positioning the support rollers to contact the transfer rollers from below, they mediate the gravitational effect, distributing the load and preventing direct transmission of droop-induced stress to the substrate.
2Area of stationary object
If transfer roller length is increased to accommodate larger substrates, then substrate size capacity increases, but roller droop due to gravity increases
Solution Approach 1:
The patent segments the support function by introducing multiple support rollers distributed along the length of the transfer rollers. This segmentation allows each support roller to independently counteract local gravitational effects on the transfer roller, enabling the system to handle larger substrates without compromising the structural stability of the transfer rollers.
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
Prevents substrate damage by maintaining the substrate in a floating state during plasma irradiation, ensuring effective dirt removal and drying while reducing detergent solution waste through recycling.
Implementation Method 1
a floating unit that maintains the substrate in a floating state
Implementation Method 2
a plasma irradiation unit that irradiates plasma to the substrate and a floating unit that maintains the substrate in a floating state
Data Source
AI summary
A washing device is disclosed, which is capable of preventing damage of a substrate caused by drooping of the substrate. The washing device includes a plasma irradiating part supplied with a substrate from a substrate loading part to remove dirt from the substrate by irradiating plasma to the substrate; a dirt washing part supplied from the substrate from the plasma irradiating part to remove dirt remaining on the substrate; a finishing washing part supplied with the substrate from the dirt washing part to wash the substrate; a drying part supplied with the substrate from the finishing washing part to dry the substrate; and a substrate unloading part supplied with the substrate from the drying part to unload the substrate, wherein the plasma irradiating part includes a plasma irradiation unit that irradiates plasma to the substrate and a floating unit that maintains the substrate in a floating state.