Method of making a microceramic electromagnetic light shutter
US5881449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of making a microceramic electromagnetic light shutter, includes forming a micromolded bottom ceramic portion in the green state with a sacrificial fiber having a first and second end portion and being shaped in the form of a coil, mounted on its surface; forming a micromolded top ceramic portion in the green state having surface features that include a pair of bearing structures, at least one stop structure, and a first and second through-hole; assembling the top and bottom micromolded ceramic portions with the first and second ends of the sacrificial fiber being drawn through the first and second through-holes, respectively, and sintering such assembled structure to form a unitary ceramic body; etching through the first and second through-holes to etch away the sacrificial fiber to thereby provide an embedded coil receiving cavity. The method further includes filling the coil receiving cavity with a conductive material to form an embedded coil; providing a light aperture through the unitary ceramic body and a first and second recess in the unitary ceramic body; mounting a ferromagnetic element in the first recess; and mounting a shutter drive mechanism, having a shutter …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.