UV Reflective Layer for Laser Substrate Stripping

The patent introduces an ultraviolet reflective layer as an intermediary component between the substrate and the thin film transistor array. This reflective layer mediates the laser stripping process by reflecting excess ultraviolet light away from the film structure, allowing high-energy laser to successfully remove the substrate while protecting the film from damage. The reflective layer acts as a buffer that manages laser energy distribution.

The patent converts the potentially harmful effect of high-energy laser radiation on the film structure into a beneficial process. By designing the ultraviolet reflective layer with specific refractive index characteristics, the harmful excess laser energy is reflected back to assist in substrate removal while the film structure remains protected. The harmful high-energy laser is thus transformed into a useful stripping tool when properly managed by the reflective layer.

The ultraviolet reflective layer serves as a mediator that enables the use of low-energy or moderate-energy lasers for substrate stripping. By reflecting excess ultraviolet light, it concentrates the necessary energy at the substrate interface while preventing energy dissipation that would require higher initial laser power. This intermediary layer makes efficient substrate removal possible with controlled laser energy.

The patent changes the optical parameters of the system by introducing a layer with specific refractive index properties (different from both the substrate and the film layers). This parameter change in the optical path allows for more efficient energy transfer during laser stripping, enabling successful substrate removal with lower laser energy than would be required without the reflective layer.

The ultraviolet reflective layer acts as a protective intermediary that intercepts and reflects excess ultraviolet laser light before it can reach and damage the thin film transistor array and other sensitive components. This intermediary layer allows the ultraviolet laser to successfully strip the substrate while preventing the harmful side effect of laser-induced damage to the display panel structure.

The patent converts the harmful excess ultraviolet light that would normally damage the panel into a beneficial reflected beam. By positioning the reflective layer strategically, the excess laser energy that would cause damage is instead reflected back to assist in the substrate stripping process or safely directed away from sensitive components, turning a harmful factor into a useful or neutral element.