摘要:
A method is provided for forming hermetically sealed cavities (20), e.g. semiconductor cavities comprising fragile devices, MEMS or NEMS devices (12). The method according to embodiments of the present invention allows forming hermetically sealed cavities (20) at a controlled atmosphere and pressure and at low temperatures, preferably at temperatures not exceeding 200°C. The method furthermore allows forming sealed cavities (20) with short release times, for example release times of a few minutes to 30 minutes. The method may for example be used for zero level packaging of MEMS or NEMS devices.
摘要:
The inventive method for closing a vent (9) formed in a microstructure (3) wall (10) under a controlled atmosphere is carried out by an ultrasonic bonding machine comprising a welding electrode (14), a metal wire (13) crossing the electrode (14) and a working table (15). A ball (12) is formed by melting on the end part of the metal wire (13) and is deposited on the end of the vent (9) and a holding plug (11) and is subsequently exposed to compression forces (F) and ultrasonic vibration (Fus) by the electrode (14) in a controlled atmosphere chamber (17).
摘要:
A method of enclosing a micromechanical element formed between a base layer and one or more metallization layers includes forming one or more encapsulating layers over the micromechanical element and providing an encapsulating wall surrounding the element extending between the base layer and the one or more encapsulating layers. An electrical connection is provided between the base layers and the one or more metallization layers formed above the micromechanical element.
摘要:
An integrated lid for micro-electro-mechanical system (MEMS) devices is formed from a nitride layer deposited over a cavity containing movable parts for the device. Pillars are formed through openings within large area movable parts to support the lid over those parts. Slides are formed and moved under large etchant openings through the lid to allow the openings to be sealed by sputtering.
摘要:
The invention relates to a micromechanical component that comprises a substrate (1); a movable sensor structure (6) in a first micromechanical functional layer (5) disposed above said substrate; a first closing layer (8) on the first micromechanical functional layer (5), which is at least partially structured; a second micromechanical functional layer (10) on the first closing layer (8), which has at least one covering function and which is at least partially anchored in the first micromechanical functional layer (5); and a second closing layer (8) on the second micromechanical functional layer (10). The sensor structure (6) is provided with trenches (7) the width of which is not larger than a maximum trench width (66) that can be closed by the first closing layer (8) in the form of plugs (9) that do not reach the trench bottoms.
摘要:
A method is disclosed for manufacturing a sealed cavity comprised in a microelectronic device, comprising forming a sacrificial layer at least at locations where the cavity is to be provided, depositing a membrane layer on top of the sacrificial layer, patterning the membrane layer in at least two separate membrane layer blocks, removing the sacrificial laye through the membrane layer, and sealing the cavity by sealing the membrane layer, wherein patterning the membrane layer is performed after removal of the sacrificial layer; and associated microelectronic devices.
摘要:
A method for packaging a microelectronic device in an hermetically sealed cavity and managing an atmosphere of the cavity with a dedicated hole, including making said cavity between a support and a cap layer such that a sacrificial material and the device are arranged in the cavity; removing the sacrificial material through at least one release hole, and hermetically sealing the release hole; making a portion of wettable material on the cap layer, around a blind hole or a part of said outside surface corresponding to a location of said dedicated hole; making a portion of fuse material on the portion of wettable material; making the dedicated hole by etching the cap layer; and reflowing the portion of fuse material with a controlled atmosphere, forming a bump of fuse material which hermetically plugs said dedicated hole.