Display Apparatus Connecting Electrode Protection
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving a balance between size, portability, and performance, particularly with the limitations of cathode ray tube (CRT) displays.
Innovation Solution
A display apparatus is designed with a base substrate featuring a display area and a peripheral area, including a source/drain pattern with a connecting electrode and a thin film transistor electrode, a planarization insulation layer exposing the connecting electrode's top surface, and a driving member connected via a connecting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planarization insulation layer is formed to expose the connecting electrode top surface, then the connection between driving member and connecting electrode is facilitated, but impurity precipitation may occur on the connecting electrode surface
Solution Approach 1:
A protective film is introduced as an intermediary layer between the planarization insulation layer and the connecting electrode. This film prevents direct contact that would cause impurity precipitation while allowing the planarization process to proceed, thus resolving the contradiction between ease of connection and reliability
Solution Approach 2:
The protective film is formed on the connecting electrode before the planarization insulation layer is deposited. This preliminary protective action prevents impurity precipitation during subsequent manufacturing steps while maintaining the ability to expose the top surface for connection
2Ease of operation
If the connecting electrode top surface is exposed by removing insulation layer, then connection to driving member is enabled, but defects due to impurity precipitation increase
Solution Approach 1:
The protective film serves as a mediator that allows the connecting electrode top surface to be exposed for connection while preventing impurity precipitation during the exposure process, thus enabling connection capability without manufacturing defects
Solution Approach 2:
The potential harm of impurity precipitation is converted into a benefit by using the protective film to control the exposure process, allowing precise exposure of the connecting electrode top surface while preventing contamination
Data Source
AI summary
A display apparatus includes a base substrate including a display area in which an image is displayed and a peripheral area adjacent to the display area, a source/drain pattern on the base substrate, the source/drain pattern including a connecting electrode in a pad portion of the peripheral area and a electrode of a thin film transistor in the display area, a planarization insulation layer on the base substrate, the planarization insulation layer contacting a side surface of the connecting electrode and a side surface of the electrode of the thin film transistor, and exposing a top surface of the connecting electrode, a connecting member contacting the connecting electrode, and a driving member including a driving circuit, the driving member being connected to the connecting member.