Abstract:
Disclosed is a method enabling cavities (7) having an optically transparent wall to be produced in a component (10) using standard microsystem engineering methods in a simple and economical manner. Firstly, a silicon area which is surrounded on all sides by an optically transparent outer layer is produced. At least one opening (6) is subsequently produced in the outer layer. Said opening (6) is used to dissolve out the silicon surrounded by the outer layer in order to create a cavity (7) inside the outer layer. The outer layer acts as a layer which stops etching.
Abstract:
A microelectromechanical (MEMS) device and a method of fabricating a MEMS device are provided. The method of fabricating the MEMS device includes the steps of: etching a die release trench in a primary handle layer of a wafer having the handle layer, an etch-stop layer disposed on the primary handle layer, and a device layer disposed on the etch-stop layer; patterning a release trench in the device layer disposed on the etch-stop layer; patterning a release trench in the device layer that is aligned with the release trench in the primary handle layer; temporarily attaching an additional handle layer to the primary handle layer; etching the device layer to define a structure in the device layer; removing the etch-stop layer; and removing the additional handle layer to release the die.
Abstract:
A microelectromechanical system is fabricated from a substrate having a handle layer, a silicon sacrificial layer and a device layer. A micromechanical structure is etched in the device layer and the underlying silicon sacrificial layer is etched away to release the micromechanical structure for movement. One particular micromechanical structure described is a micromirror.
Abstract:
A method of forming a membrane with nanometer scale pores includes forming a sacrificial etch stop layer on a substrate. A base layer is constructed on the sacrificial etch stop layer. Micrometer scale pores are formed within the base layer. A sacrificial base layer is built on the base layer. The sacrificial base layer is removed from selected regions of the base layer to define nanometer scale pores within the base layer. The resultant membrane has sub-fifty nanometer pores formed within it.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing a structure which includes an active part comprising at least two zones of different thicknesses and in which at least one of these zones is composed of a single-crystal semiconductor material and reducing cost and having no drawback.SOLUTION: There is provided the method of producing the structure comprising the active part including first and second suspended zone of thicknesses different from that of a first substrate. The method includes steps of (a) demarcating the contour in the horizontal direction of at least one first suspended zone with first thickness thinner than that of the first substrate by processing the front face of the first substrate, (b) forming an etch stop layer of the first suspended zone of a lower part of a suspended zone, this is carried out before a step of removing a semiconductor material arranged at the lower part of the first suspended zone, (c) forming a sacrifice layer on the front face of the first substrate, (d) releasing the sacrifice layer by processing from the back face of the first substrate, forming at least one second suspended zone, and making it reach the stop layer of the first suspended zone, and (e) releasing the first and second suspended zones.
Abstract:
PROBLEM TO BE SOLVED: To provide a capacitor microphone and pressure sensor, which can incease the degree of freedom in the structure of a parallel plate electrode, designing of a mountable circuit by eliminating the restriction in a producing process. SOLUTION: The capacitor microphone and pressure sensor 100 is formed by etching a bonded substrate 400 having an etch stop layer 220 on one surface of a vibration film substrate 210, and obtained by inserting a bonding film 320 to be used for bonding the vibration film substrate 210 and a rear surface plate substrate 310 between the etch stop layer 220 and the rear surface plate substrate 310 to bond them. The bonding film 320 contains the same impurity as the boron doped for forming the etch stop layer 220, the density of the impurity contained in the bonding film 320 equal to or higher than that of the impurity doped in the etch stop layer 220, impurity diffusion for forming the etch stop layer 220 is performed at ≤1200°C, and heat processing after this is performed at ≥900°C and equal to or lower than the temperature of the impurity diffusion. COPYRIGHT: (C)2003,JPO