Working on the developing of a European standard for DD testing

Goal of the study

• Propose a DD test standard

• Should be available by the end of the year after ESA and Components

Technology Board (CTB)/Radiation Working group (RWG) comments

• Goal of this presentation

⇒ Not a draft of the future guidelines, but:

• Remind the physical processes responsible of the displacement damages

• Remind the electrical effects

• List the main parameters that should be taken into account

Speaker:

Thierry Nuns. Senior Engineer at Space Environment Group at ONERA.

Working on the developing of a European standard for DD testing

Energy transfer from particle to matter

Particle slowed down by transfering energy to the matter.
Main part of the deposited energy is ionisation (interaction with the electrons), the rest is atomic displacements (interaction with the nuclei).
Fraction depends on particle type and energy, target material.
Fraction decreases when the energy increases.
Displacement damage: degradation in the bulk of the device.

Particle matter interaction for DD

3 main interaction types, different energy transfers:
• Coulombian
• Nuclear elastic
• Nuclear inelastic

Increasing transfered energy to the Primary Knock-on Atom and cascade size

Consequence
• Single displaced atom or interaction cascade
• Creation of Frenkel pairs (vacancy-interstitial pairs) or more complex lattice defects (high concentration of deposited energy)
• Reorganisation of these pairs into stable defects. Phase of “annealing”
• Introduction of levels in the gap that modify the electrical properties of semiconducto