Zaporro :
Using national security again as excuse to discriminate other companies and countries...
Wow. Can of worms = open.
This sort of muddles together three different issues.
First, there's the issue of industrial espionage. If true, then it's certainly in the aggrieved country's right to seek remediation and injunctions against the perpetrator. Now, the normal way to do this would probably be to bring a court case through the WTO, which basically exists as a sort of trade-related dispute resolution mechanism. However, that takes time and Micron might not feel they have quite the level of evidence needed to win such a case.
Second, there's the issue of economic protectionism. As @stdragon says, it's within any country's right to control its trade with other countries (or entities therein), for any reason. However, actions on this front have the potential to jeopardize trading relationships. IMO, the important thing is to have clear policies and behave consistently. That can build trust to the point that others are willing to build trading relationships with you.
Finally, there's the issue of using national security as the pretext for taking these actions. I think it's a stretch to equate economic well-being with national security, but the likely reason for acting under this rubric is due to details of current US law constraining what the Executive branch can do on its own.
I don't think there's a single "right" answer, as to what should be done. It's very much a matter of political and economic philosophy. The one thing we can say for sure is that it's well accepted that China has long practiced industrial espionage and doesn't appear to be changing its ways.
I just doubt they're so dependent on US suppliers that this embargo will slow them down for long.
I wonder if a better approach would be to form a large coalition, with other developed countries, and all sanction Chinese trade until they drop state sponsored industrial espionage and start prosecuting non-state perpetrators of it.