Environment-resistant module, micropackage and methods of manufacturing same
View Patent ↗An environment-resistant module which provides both thermal and vibration isolation for a packaged micromachined or MEMS device is disclosed. A microplatform and a support structure for the microplatform provide the thermal and vibration isolation. The package is both hermetic and vacuum compatible and provides vertical feedthroughs for signal transfer. A micromachined or MEMS device transfer method is also disclosed that can handle a wide variety of individual micromachined or MEMS dies or wafers, in either a hybrid or integrated fashion. The module simultaneously provides both thermal and vibration isolation for the MEMS device using the microplatform and the support structure which may be fabricated from a thin glass wafer that is patterned to create crab-leg shaped suspension tethers or beams.
1. An environment-resistant module including a packaged device, the module comprising:
a device;
a package having an inner surface which forms a cavity and an outer surface which communicates with the environment;
a microplatform located within the cavity, the device being supported on the microplatform; and
a flexible, thermally isolating support structure to support the microplatform and the device within the cavity wherein the microplatform and support structure provide both thermal and vibration isolation of the device wherein both the microplatform and the support structure are substantially planar in a lateral direction and are at least partially defined by a single wafer and wherein the package has a relatively low profile.
2. The module as claimed in claim 1 , wherein the package includes a substrate and a capsule connected to the substrate at a bonding area to at least partially form the cavity.
3. The module as claimed in claim 1 , wherein the package completely encases the microplatform and the device to allow hermetic or vacuum encapsulation of the microplatform and the device.
4. The module as claimed in claim 1 , further comprising electrical interconnections coupled to the device and at least one feedthrough through the package to electrically connect the device to the environment.
5. The module as claimed in claim 4 , wherein the at least one feedthrough includes a vertical feedthrough.
6. The module as claimed in claim 4 , wherein the at least one feedthrough includes a horizontal feedthrough.
7. The module as claimed in claim 5 , wherein the vertical feedthrough extends through the substrate.
8. The module as claimed in claim 5 , wherein the vertical feedthrough extends through the capsule.
9. The module as claimed in claim 1 , wherein the support structure and the microplatform are defined by a layer of a wafer.
10. The module as claimed in claim 9 , wherein the wafer is a glass wafer.
11. The module as claimed in claim 2 , wherein the substrate includes a wafer.
12. The module as claimed in claim 11 , wherein the wafer is a semiconductor wafer.
13. The module as claimed in claim 1 , wherein the support structure includes a plurality of isolation suspension beams or tethers.
14. The module as claimed in claim 1 further comprising a heater and a temperature sensor supported on the microplatform.
15. The module as claimed in claim 1 further comprising at least one shock absorption layer formed inside the package.
16. The module as claimed in claim 1 further comprising at least one anti-radiation shield formed inside the package.
17. The module as claimed in claim 1 further comprising a getter layer formed inside the package.
18. The module as claimed in claim 1 , wherein at least a portion of the package is optically transparent.
19. The module as claimed in claim 1 , wherein at least a portion of the package is open to the environment.
20. The module as claimed in claim 1 , wherein the support structure and the microplatform are at least partially defined by a single layer.
21. The module as claimed in claim 1 , wherein the support structure is at least partially defined by a film.
22. The module as claimed in claim 1 , wherein the wafer is a glass wafer.
23. The module as claimed in claim 1 , wherein the microplatform and the support structure are made of the same material.
24. The module as claimed in claim 1 , wherein the microplatform and the support structure are substantially coplanar.
25. The module as claimed in claim 1 , wherein the wafer is a silicon wafer.
26. The module as claimed in claim 1 , wherein the device is an accelerometer.
27. The module as claimed in claim 1 , wherein the device is a gyroscope.