Ultrashort pulse laser-based AMOLED TV non-thermal repair technology and repair device

 

Client / Market

• Companies interested in non-thermal repair machining technology of large size AMOLED panel

 

Necessity of this Technology

• Non-thermal repair process is necessary, and a system for large size processing needs to be established.
• Repair process using nanosecond laser inevitably causes thermal damage to the object.
• In case of processing an organic matter that is very sensitive to the processing temperature, unnecessary damages are caused from heat around the processing unit.
• When defect or error occurs during large size AMOLED panel manufacturing, the entire quantity is discarded. From the production yield perspective, this is a serious downside, therefore a repair technology is needed.

 

Technical Differentiation

• Ultrashort pulse laser has relatively short pulse width compared to nanosecond laser and can be used for non-thermal processing to minimize damage from heat on the object.
• With the ultrashort laser machining system using a gantry, a large size AMOLED panel can be repaired.
• The beam size can be adjusted with the motorized slit to adjust the beam shape in the light path of the ultrashort pulse laser-based machining system, and with the square-shaped beam, machining of area requiring repair can be executed with the minimum line width of 500 nm.
• Using the gantry established for this system, the defective area of the large size AMOLED panel is detected and is quickly repaired using the ultrashort pulse laser.

 

Excellence of Technology

• The process irradiates the femtosecond laser beam to the target layer and processes the desired area. It is utilized for partial repair of a specific defective area.
• For this, the beam shape and the machining size is adjusted through the slit.
• It is the blueprint that roughly shows the active organic self-illuminator TV’s femtosecond laser repair system. For large area repair, the gantry system is used to adjust the laser beam location, not the target for repair, for machining.
• The repair target is fixed with the vacuum chuck of the stage to minimize the elevation difference error.
• The head researcher for this technology has over 10 years of research experience in ultrashort femtosecond laser-applied superprecision micro machining field.

 

Current Intellectual Property Right Status

PATENT

• Non-thermal Repair Method and Device for Full HD High Resolution Mobile Active Organic Self-illuminator (KR1477005)
• Non-thermal Repair Method and Device for Active Organic Self-illuminator Using Selective Pulse Width Tunable Laser (KR1450767)
• Thermal and Non-thermal Converged Repair Device for Active Organic Selfilluminator (KR1387996)
• Non-thermal Repair Method and Device for Transparent Active Organic Selfilluminator Using Ultrashort Pulse Laser (KR2012-0042367)
• Non-thermal Repair Method and Device for Large Size Active Organic Selfilluminator Using Ultrashort Pulse Laser (KR2012-0056576)
• Non-thermal Repair Method and Device for Active Organic Self-illuminator Using Ultrashort Pulse Laser (KR2012-0016303)
• Non-thermal Repair Method and Device for Flexible Active Organic Self-illuminator Using Ultrashort Pulse Laser (KR2012-0016139)