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How to prevent SEE (single event effect)?
In a previous article, as a phenomenon unique to the universe, SEE(Singe Event Effects)and
TID(Total Ionizing Dose effects)two of was introduced.
These are events that may have a negative impact on semiconductors used in satellites launched into space.
What can we do as “countermeasures”?
In this article, we will focus on “SEE” and introduce typical countermeasures from both soft and hard error perspectives.
Protect semiconductor devices from SEE! What is that method?
1. SEE measures against soft errors
SEE is a phenomenon that occurs when a single high-energy particle enters a semiconductor device.
Particles with an order of magnitude higher energy can even penetrate the shield used for TID countermeasures (*), so
SEE countermeasures must be taken within semiconductor devices. * What is TID countermeasure (shield)? Please refer to.
Circuit countermeasures and technology selection are effective for"soft errors" that cause temporary malfunctions.
In addition to physical blocking, the strength of resistance also changes depending on how you choose the product.
▶ Example of “technology selection” (SEE resistance by technology used in FPGA)
2. SEE measures against hard errors
On the other hand, "hard errors" that cause irreversible permanent failures occur when large currents flow to paths that are not desired during normal operation.
"SEE countermeasures" differ depending on the combination of the expected phenomenon and the type of device, but effective countermeasures include selecting the manufacturing process and limiting the applied voltage (Figure 1).
For SEE (single event effect), Macnica!
Did you understand the “SEE countermeasures” introduced this time?
There are several types of SEE Depending on the type of device It is necessary to take each measure. there is. There are various countermeasures, and we cannot introduce them all here, so this time we will introduce them. CountermeasuresI would like to introduce some of them.
At Macnica, we We provide support for SEE resistance, testing, and evaluation of semiconductor devices. doing.
Utilizing the know-how in space business that we have cultivated over many years, we support our customers with QE/FAE specializing in space.
▶ About Macnica 's aerospace-related support