Infrared sensor package

• US 5,391,875 A
• Filed: 07/18/1990
• Issued: 02/21/1995
• Est. Priority Date: 07/18/1990
• Status: Expired due to Fees

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Litchfield, Willard C., Cederberg, Andrew A.
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US07/555,867
• Time in Patent Office: 1,679 Days
• Field of Search: 250/352, 250/338.1
• US Class Current: 250/352
• CPC Class Codes: G01J 2005/0077 Imaging
• CPC Class Codes: G01J 3/36 Investigating two or more bands of a spectrum by separate detectors
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/061 by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
• CPC Class Codes: G01J 5/602 using selective, monochromatic or bandpass filtering
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H04N 23/11 for generating image signals from visible and infrared light wavelengths
• CPC Class Codes: H04N 5/33 Transforming infrared radiation cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20

Abstract

A dual-band infrared sensor package for use in radar system applications is provided. The package includes two detector arrays, an InSb photodiode array sensitive in the mid-wave infrared radiation range and a HgCdTe photodiode array sensitive in the long-wave infrared radiation range. The package further includes integrated circuits which provide electrical control to and data output from the detector arrays. A three dimensional arrangement of the detector arrays, integrated circuits, and ceramic interconnecting substrates is used to provide a relatively small sensor package suitable for radar system applications so that radar signals are not obscured.

Claims

1. An electromagnetic radiation sensor package comprising:

a support member having a first flared end, with a cavity disposed in said first end substantially extending through the length of the member, said member further having a second end with a platform adaptable for supporting an electromagnetic radiation sensor and at least one planar side, said at least one planar side being non-coplanar with said platform, and having a pair of sidewall portions extending above said platform, wherein said platform is substantially perpendicular to the length of the support member and wherein each of the pair of sidewall portions has a ledge portion disposed above the platform.

2. The package recited in claim 1 further comprising a plurality of conductors and a plurality of pins extending from said first flared end, with said conductors being disposed in direct contact with said platform and extending substantially from said platform and terminating at said plurality of pins.

24. The package recited in claim 1 wherein said support member is comprised of glass.

27. The package recited in claim 2 wherein said conductors are integrally formed on said support member.

3. An infrared sensor comprising:

a support member having a first end, with a cavity disposed in said first end substantially extending through the length of the member, said member further having a second end with a platform and at least one side being non-coplanar with said platform, and having a pair of sidewall portions extending above said platform, wherein said platform is disposed substantially perpendicular to the length of said support member;

first means, disposed over the platform of the second end and responsive to electromagnetic infrared radiation having wavelengths within a first range of wavelengths, for providing a first plurality of signals corresponding to intensity of incident electromagnetic infrared radiation having wavelengths within said first range of wavelengths; and

multiplexing means, disposed over the at least one side of the second end and having a plurality of inputs fed by signals provided by the first means, for providing at least one serial data stream corresponding to the signals provided by the first means.

4. The infrared sensor recited in claim 3 wherein each of said pair of sidewall portions has a ledge portion disposed above said platform and wherein the infrared sensor furthers comprises an optical filter supported by said Ledge portions.

5. The infrared sensor recited in claim 3 further comprising at least one interconnecting member disposed over the at least one side, said interconnecting member being electrically coupled to a portion of the first plurality of signals provided by the first means and the plurality of inputs to the multiplexing means.

6. The infrared sensor recited in claim 3 further comprising:

second means, disposed over the platform of the second end and responsive to electromagnetic infrared radiation having wavelengths within a second range of wavelengths, for providing a second plurality of signals corresponding to intensity of incident electromagnetic infrared radiation having wavelengths within said second range of wavelengths, and wherein said multiplexing means has a plurality of inputs provided by the first and second means for providing at least one serial data stream corresponding to the signals provided by the first and second means.

7. The infrared sensor recited in claim 3 wherein the support member has conductors disposed thereon, said conductors extending substantially from said first end to said second end.

8. The infrared sensor recited in claim 7 wherein the conductors are comprised of gold.

9. The infrared sensor recited in claim 3 wherein the first and second means each include a plurality of photodiodes.

10. An infrared sensor comprising:

a support member having a first end, with a cavity disposed in said first end substantially extending through the length of the member, said member further having a second end with a platform and at least one side non-coplanar with said platform;

means disposed over the platform of the second end and responsive to electromagnetic infrared radiation having wavelengths within a first and a second range of wavelengths, for providing a plurality of signals corresponding to intensity of incident electromagnetic infrared radiation having wavelengths with said first and second ranges of wavelengths; and

multiplexing means, disposed over the at least one side of the second end and having a plurality of inputs fed by signals provided by said electromagnetic radiation responsive means, for providing at least one serial data stream corresponding to the signals provided by the electromagnetic infrared radiation responsive means.

11. An infrared sensor comprising:

a support member having a first end, with a cavity disposed in said first end substantially extending through the length of the member, said member further having a second end with a platform and a pair of sides, said sides being non-coplanar with said platform;

first means, disposed over the platform of the second end and responsive to electromagnetic infrared radiation having wavelengths within a first range of wavelengths, for providing a first plurality of signals corresponding to intensity of incident electromagnetic infrared radiation having wavelengths within said first range of wavelengths;

second means, disposed over the platform of the second end and responsive to electromagnetic infrared radiation having wavelengths within a second range of wavelengths, for providing a second plurality of signals-corresponding to intensity of incident electromagnetic infrared radiation having wavelengths within said second range of wavelengths;

first multiplexing means, disposed over the platform of the second end and having a plurality of inputs fed by a first portion of the first plurality of signals provided by the first means for providing a serial data stream corresponding to the first portion of the first plurality of signals provided by the first means;

second multiplexing means, disposed over the platform of the second end and having a plurality of inputs fed by a first portion of the second plurality of signals provided by the second means for providing a serial data stream corresponding to the first portion of the second plurality of signals provided by the second means;

third multiplexing means, disposed over a first one of said pair of sides of the second end and having a plurality of inputs fed by a second, remaining portion of the first plurality of signals provided by the first means for providing a serial data stream corresponding to the second, remaining portion of the first plurality of signals provided by the first means; and

fourth multiplexing means, disposed over the second one of said pair of sides and having a plurality of inputs fed by the second, remaining portion of the plurality of signals provided by the second means for providing a serial data stream corresponding to the second, remaining portion of the second plurality of signals provided.

12. The infrared sensor recited in claim 11 wherein the support member has conductors disposed thereon extending substantially from said first end to said second end.

13. The infrared sensor recited in claim 12 wherein the conductors are comprised of gold.

14. The infrared sensor recited in claim 11 further comprising a plurality of interconnecting members disposed over the platform of said second end with a first interconnecting member electrically coupled to the first portion of the first plurality of signals provided by the first means and the plurality of inputs of the first multiplexing means, and a second interconnecting member electrically coupled to the first portion of the second plurality of signals provided by the second means and the plurality of inputs of the first multiplexing means.

15. The structure recited in claim 14 wherein each of the plurality of interconnecting members includes a plurality of conductors disposed on a single plane.

16. The structure recited in claim 14 wherein each of the plurality of interconnecting members includes a first plurality of conductors disposed on a first plane and a second plurality of conductors disposed on a second, parallel plane.

17. The infrared sensor recited in claim 11 further comprising a plurality of interconnecting members disposed over said pair of sides of said second end, with a first interconnecting member electrically coupled to the second, remaining portion of the first plurality of signals provided by the first means and the plurality of inputs of the third multiplexing means, and a second interconnecting member electrically coupled to the second, remaining portion of the second plurality of signals provided by the second means and the plurality of inputs of the fourth multiplexing means.

18. The structure recited in claim 17 wherein each of the plurality of interconnecting members includes a plurality of conductors disposed on a single plane.

19. The structure recited in claim 17 wherein each of the plurality of interconnecting members includes a first plurality of conductors disposed on a first plane and a second plurality of conductors disposed on a second, parallel plane.

20. The infrared sensor recited in claim 11 wherein said first and second means are comprised of a plurality of photosensitive elements.

21. The infrared sensor recited in claim 20 wherein the plurality of photosensitive elements are photodiodes.

22. The infrared sensor recited in claim 21 wherein the plurality of photodiodes comprising the first means are comprised of indium antimonide and the plurality of photodiodes comprising the second means are comprised of mercury cadmium telluride.

23. The infrared sensor of claim 11 wherein the support member is glass.

28. The infrared sensor recited in claim 11 wherein said platform is disposed substantially perpendicular to the length of the support member and said support member further comprises, at said second end, a pair of curved sidewall portions extending above said platform, wherein each one of said pair of curved sidewall portions has a ledge portion disposed above said platform and wherein the infrared sensor further comprises an optical filter supported by said ledge portions.

25. An infrared sensor package comprising:

a support member for supporting said infrared sensor having a first end, with a cavity disposed in said first end substantially extending through the length of the member, said member further having a second end; and

a platform disposed over said second end, said platform comprising;

(a) a top surface disposed .substantially perpendicular to the length of the support member; and

(b) a pair of curved sidewall portions extending above said top surface.

26. The infrared sensor package recited in claim 25 wherein each one of said pair of curved sidewall portions has a ledge portion disposed above said top surface.