Micromachined acceleration activated mechanical switch and electromagnetic sensor
US6262463A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A micro-sensor having have a flexible monocrystalline structure that is moved by an external force. In one embodiment, one or more pole tips are mounted on the monocrystalline structure. The monocrystalline structure is suspended over one or more planar coils such that each pole tip is suspended over a corresponding planar coil. As the monocrystalline structure moves in response to the external force, the pole tips are moved in the coils, thereby changing the inductance or inducing a voltage in the coils. In another variation, a micro-switch includes a lower structural member having a pattern of raised spacer pads that laterally surround a plurality of contact pads. The lower structural member is joined to an upper structural member that includes a frame, a platform located in the frame and a plurality of spring elements which connect the frame to the platform. The upper structural member has a conductive layer formed on its planar lower surface. The lower surface of the frame is affixed to the spacer pads, such that the platform is suspended over the contact pads. An external force applied to the resulting structure causes the spring elements to flex, such that the platform moves …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.