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IC and Component Selection for Space Sy stems – Presented by Kenneth A . LaBel 15 Flight Program: T ypical Radiation Hardness Assurance (RHA) Flow Environment Definition Project Requirements and Specifications T echnolog…

IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel

Radiation and Traditional IC Reliability:

Are the two related?

• The short answer is yes

– Radiation MTTF conditions can accelerate reliability

wearout mechanisms either by eroding electrical signal

margins or material damage

– Radiation MTBF conditions also can impact long-term

reliability

• A single energetic particle, for example, can cause device

failure instantaneously (such as with a gate rupture) or at a

later time due to material damage.

• The methods of coupling the radiation-induced impacts

into reliability calculations are limited

– NEPP Program has a new effort to explore this coupling on

state-of-the-art commercial Flash memories that are highly

sought by flight programs

Latent damage from a single particle

IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel

Flight Program:

Typical Radiation Hardness Assurance (RHA) Flow

Environment

Definition

Project

Requirements

and

Specifications

Technology Hardness

Spacecraft or

Component

Mechanical

Modeling –

3D ray trace,

Monte Carlo,

NOVICE, etc.

Flight Program RHA Managed via Lead Radiation Engineer

Design Margins

External Environment

Environment in

the presence of

the spacecraft

Box/system Level

In-Flight

Evaluation

Technology

Performance

Anomaly

Resolution

Lessons

Learned

Design

Evaluation

Parts List Screening

Radiation

Characterizations,

Instrument

Calibration,

and Performance

Predictions

Mitigation

Approaches

and Design

Reliability

Iteration over project development cycle

Cradle to Grave!

IC and Component Selection for Space Systems – Presented by Kenneth A. LaBel

Radiation Perspective on IC Selection

• From the radiation perspective, ICs can be viewed

as one of four categories.

– Guaranteed hardness

• Radiation-hardened by process (RHBP)

• Radiation-hardened by design (RHBD)

– Historical ground-based radiation data

• Lot acceptance criteria

– Historical flight usage

• Statistical significance

– Unknown assurance

• New device or one with no data or guarantee

RHBD Voting Approach

http://www.aero.org/publications/crosslink/summer2003/06.html