Abstract: A high frequency induction heater built in an injection mold. The high frequency induction heater has a metal or silicon mold-insert, at least a heating module and at least a thermometer detector. The elements are reasonably fit with the mold-insert utilizing well-defined MEMS technology and UV-LIGA process. The high frequency induction heater is employed to apply a local heat for a microstructure of mold-insert during the micro molding process. By using the high frequency induction heater a fluid mold flow and high aspect ratio replication is achieved.

Abstract: First, a substrate is provided, and a half-tone mask is employed to perform an exposing and developing process for forming a plurality of photoresist patterns having different thickness. Then, a flow process is performed to heat the photoresist patterns so that each photoresist pattern has a microlens surface. Following that, a metal plate is formed on the substrate for obtaining a plurality of patterns, which are opposite to the plurality of photoresist patterns, on the bottom surface. Finally, the metal plate is removed from the substrate, and combined with an insert mold.

Abstract: An optical recording medium having a scratch-off material layer includes a transparent substrate, a reflective layer formed on the transparent substrate, a protective layer formed on the reflective layer, information formed on a surface of the protective layer, and at least one opaque scratch-off material layer formed on the protective layer for disguising the information.