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Iridium Technologies, LLC has successfully produced a radiation hardened digital library in Jazz 0.18um process under the SHARE program.

Iridium Technologies, LLC was the only company participating in the SHARE program to successfully produce strategic hardened integrated circuits (>1 Mrad).

The SHARE Program

Iridium Technologies initial first-pass design success of a radiation-hardened standard cell digital library, and radiation-hardened digital gate array, was supported by The United States Air Force Research Laboratories (AFRL) Space Vehicles Directorate at Kirtland, Air Force Base through their Systematic Hierarchal Approach for Radiation Hardened Electronics (SHARE) Program.

 

SHARE's objective was to deliver affordable EDA tools, matched with design kits, to facilitate access to onshore foundries.

 

The prime contractor for the SHARE effort was L-3 Communications Electromagnetics & Electronics Division (San Diego, CA).

Some Results

 

Workbench at Iridium Technologies, LLC

 

The following figures show the results of a chain of inverters, used to extract individual gate timing. Stimulus curves are ORANGE, and resulting curves are BLUE.

 

The "notch" seen in the ORANGE curve was due to reflection, which was an artifact of the test setup.

 

Inverter Rise Time Post 100 KradsInverter Test Circuit - Rise Time - Post 100Krads

 

Inverter Fall Time Post 100 KradsInverter Test Circuit - Fall Time - Post 100Krads

 

Inverter Test Circuit - Rise Time - Post 300Krads

 

 

Inverter Test Circuit - Fall Time - Post 300Krads

 

 

Inverter Test Circuit - Rise Time - Post 1Mrad

 

 

Inverter Test Circuit - Fall Time - Post 1Mrad

 

 

 

Pre

10k

50k

100K

300K

500K

1M

RISE (ns)

23.5

17.1

20.5

18.5

19.9

22

29

FALL(ns)

37

33.5

33

29

24.7

32

27.8

PROP R(ns)

28.5

27.9

30

29.5

31.4

30

32.2

PROP F(ns)

33.5

31.3

34.5

33

30

32.5

30.6

V high (V)

3.28

3.28

3.28

3.28

3.28

3.28

3.28

V low (V)

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Inverter Test Circuit - Average - Post Total-Dose Results

 

 

Inverter Test Circuit - Average - Post Total-Dose Results

 

 

Additionally

Iridium Technologies, LLC's contribution to the SHARE program was in providing the ONLY integrated circuitry, manufactured under the SHARE program, to EXCEED 1Mrad of total-dose Cobalt60 gamma radiation.

 

 

A complete total-dose test report of Iridium Technologies, LLC's radiation-hardened digital library may be made available to qualified persons and entities.

 

Going Where No Aerospace Company Has Ever Gone ...

Iridium Technologies, LLC not only focuses on creating radiation-hardened integrated circuits, but is also working on producing high reliability and radiation-hardened integrated circuits capable of normal, predictable, and reliable operation at Cryogenic temperatures and sub-threshold regions.



Cryogenic temperature operation enables integrated circuit operation in extremely cold environments, such as deep space, without having to worry about temperature extremes.

Sub-threshold operation will provide High Reliability and Radiation-Hardened integrated circuits that can operate using the least amount of power possible.

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