The present invention provides methods of forming carbamates, ureas, and isocyanates. The flexible display panel includes: a flexible panel including a display region and a non-display region, wherein the display region includes an organic light emitting device; a planarization layer disposed on the flexible panel; and a metal-dielectric layer disposed on the planarization layer and including a metal layer and a dielectric layer. Weak hook areas enable support of light weight papers upon loop surfaces that are not designed for hook and loop fastening. Neither the first ring nor the second ring support the input member or the output member on the other.