Abstract:
PURPOSE: A vibrating membrane and a back plate of a capacitance type microphone based on a MEMS(Micro Electro Mechanical System) and a method for manufacturing the same are provided to prevent oxidation due to external humidity by forming an insulating layer on the vibrating membrane and the back plate. CONSTITUTION: A first insulation layer is formed on the upper part of a substrate(101). A vibrating membrane(102) forms a second insulation layer on the top of a first metal layer. A sacrificial layer for an air gap is formed on the upper part of the vibrating membrane. An external surface of the sacrificial layer is patterned by a photolithography process. A third insulation layer is formed on the upper part of the patterned sacrificial layer. A second metal layer is formed on the upper part of the third insulation layer. An upper conductive line is formed on the patterned second metal layer. A fourth insulating layer is formed on the upper part of a second metal layer. A back plate is obtained by the photolithography process. A sound inlet hole and a vibration hole are formed.
Abstract:
PURPOSE: A cooling apparatus for a wafer and a wafer cover using a gas is provided to prevent thermal damage to a wafer by forming a through hole in a tray for mounting a wafer. CONSTITUTION: A through hole (130) is formed in a tray. The tray transfers a low temperature gas to a wafer and a wafer cover. A tray body (110) is formed around a tray central part (120). An O-ring is in contact with the lower part of the wafer cover. An O-ring accommodating groove is formed along the cylindrical surface of the tray body.
Abstract:
PURPOSE: A manufacturing method of a light emitting diode using an imprint stamp is provided to increase light extraction efficiency by forming a concave-convex pattern on the upper part of an n-type semiconductor layer or a p-type semiconductor layer. CONSTITUTION: An n-type semiconductor layer(105) including a concave-convex pattern is formed on the lower side of an n-electrode(106). An active layer(104) emitting light is formed on the lower side of the n-type semiconductor layer. A p-type semiconductor layer(103) is formed on the lower part of the active layer. A combination metal layer(102) reflecting the light generated in the active layer is formed on the lower part of the p-type semiconductor layer. A substrate or a thin film(101) is formed on the lower part of the combination metal layer.